JP3720221B2 - Dental practice method using a reconstructed image, dental practice system, recording medium recording a program realizing the method, dental display system using a reconstructed image, and recording medium recording a program realizing the system - Google Patents

Dental practice method using a reconstructed image, dental practice system, recording medium recording a program realizing the method, dental display system using a reconstructed image, and recording medium recording a program realizing the system Download PDF

Info

Publication number
JP3720221B2
JP3720221B2 JP22647499A JP22647499A JP3720221B2 JP 3720221 B2 JP3720221 B2 JP 3720221B2 JP 22647499 A JP22647499 A JP 22647499A JP 22647499 A JP22647499 A JP 22647499A JP 3720221 B2 JP3720221 B2 JP 3720221B2
Authority
JP
Japan
Prior art keywords
image
tooth
reconstructed image
jaw
dental
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
JP22647499A
Other languages
Japanese (ja)
Other versions
JP2001051593A (en
Inventor
照二 中井
征人 宮原
昭文 橘
一成 的場
正和 鈴木
Original Assignee
株式会社モリタ製作所
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社モリタ製作所 filed Critical 株式会社モリタ製作所
Priority to JP22647499A priority Critical patent/JP3720221B2/en
Publication of JP2001051593A publication Critical patent/JP2001051593A/en
Application granted granted Critical
Publication of JP3720221B2 publication Critical patent/JP3720221B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention realizes a dental practice method, a dental practice system, and a method using a reconstructed image, that is, a cross-sectional or perspective image of a tooth model reconstructed based on three-dimensional data prepared in advance. A recording medium on which a program is recorded, and a reconstructed image, that is, a dental display system using a reconstructed tooth cross-section or perspective image based on three-dimensional data prepared in advance, and realize this system The present invention relates to a recording medium on which a program is recorded.
[0002]
[Prior art]
Conventionally, in dental treatment, an operator holds a treatment instrument in his hand and performs treatment such as cutting on a treatment site of a dental jaw in the oral cavity while observing the treatment site from outside the oral cavity. However, since the treatment site is in the oral cavity, it is often impossible to see the site from the direction where it can be easily treated. For this reason, a device for eliminating so-called blind spots, such as a dental mirror used in the oral cavity, has been made. But it was not perfect.
[0003]
Also, in dental treatment, it is customary to remove the carious portion such as a tooth that is a rigid body by cutting and embed an alternative filling material. In this case, however, how much of the treatment instrument is used in the treatment site. It is very difficult to detect whether or not the material has been removed, and based on changes in the cutting sound, etc., the current situation is that it is determined by the operator's long-standing intuition and experience. It was not possible to grasp quantitatively and accurately.
[0004]
Further, since the shape of the cut portion cannot be accurately grasped, when making a prosthesis, it is indispensable to perform a mold making operation to copy the shape of the cut portion again after cutting.
[0005]
This situation occurs when implant treatment is performed, it is not possible to accurately grasp the state of drilling for the implant, it is difficult to select an appropriate implant, and the state of the prosthesis attached by the implant is grasped in advance. It was in common with the situation where it was impossible.
[0006]
In addition, the fact that the surgeon cannot clearly see or visualize the treatment status has meant that the status cannot be shown to others and advice cannot be sought. Furthermore, the fact that the treatment status cannot be grasped or cannot be converted into data requires extra means to communicate to others, and there is also a problem in terms of evaluation and accumulation of treatment results.
[0007]
Further, such various problems occur in the same way even in the case of dental practice for acquiring dental treatment.
[0008]
[Problems to be solved by the invention]
The present invention is intended to solve the above-described problem, and a dental practice method, a dental practice system, and a dental practice system based on a reconstructed image that can clearly display, grasp, and convert the state of dental practice to be stored and reused. Recording medium for recording program for realizing method, dental display system by reconstructed image that can clearly display, grasp and convert dental treatment status, and can be saved and reused, and program for realizing this system An object of the present invention is to provide a recording medium on which is recorded.
[0009]
[Means for Solving the Problems]
The teeth and jaws that are the subject of dental treatment have distinctive features compared to other medical treatment subjects. It is the only rigid body that can be exposed to the outside of the human body, and therefore preserves the results of cutting, etc. as it is, and when it grows up to a certain state, it is hard to deform after that, and therefore once damaged And cannot be restored and must rely on alternatives such as fillings, prostheses, or dentures, and so forth. However, conventional dental treatments have not fully considered such characteristics of the teeth and jaws to be treated. This situation is the same in dental practice.
[0010]
The present invention proposes a dental training method, a dental display system, and the like that fundamentally recaptures the features of the above-mentioned tooth and jaws, and its basic philosophy is engineering for dental treatment. It is a point using the technique. In other words, the tooth jaw is grasped as a rigid body, while the treatment instrument is also a rigid body. Therefore, the position and inclination are always tracked, and the three-dimensional relationship between the two is displayed by superimposing the respective reconstructed images. Thus, it is characterized by using a CAM (Computer-Aided Manufacturing) method of treating while viewing the display.
[0011]
Specifically, using a reconstructed image is a basic feature. Here, the reconstructed image refers to an image of an arbitrary cross section and perspective view reconstructed from three-dimensional data of a prepared tooth jaw model, a treatment instrument, and a tooth jaw. This three-dimensional data refers to digitized data of the three-dimensional position and composition of an arbitrary part such as a tooth model, and the tooth model and the treatment instrument are obtained from the drawings for the production. In addition, the tooth and jaw can be obtained by calculation from CT images that have recently advanced. If there is such three-dimensional data, an arbitrary cross-section such as the tooth jaw model and a perspective image from an arbitrary point can be reconstructed by calculation.
[0012]
Using such a reconstructed image, an image of a tooth jaw and a treatment instrument that cannot be seen from the position of a normal operator, for example, an image viewed from the inside of a human body, a cross-sectional image of a tooth jaw or a treatment instrument, for example, It is possible to obtain an image obtained by superimposing a longitudinal section of a treatment instrument and an image of a section of a tooth jaw on the same plane as the longitudinal section, so that the state of dental treatment or practice can be clearly grasped. Moreover, since both are rigid bodies, the locus of the cutting part of the treatment instrument on the image can be grasped as the cutting part, and the data can be recorded and saved and reused.
[0013]
In this way, by using an engineering method for dental treatment, it is possible to perform treatment suitable for the characteristics of the tooth and jaw as a treatment target, and it is also possible to realize treatment with more emphasis on human beings. The dental treatment here includes oral surgery.
[0014]
Specifically, in claims 1 to 7, a dental practice method using a reconstructed image that solves the above-described problems, in claims 8 to 14 a dental practice system using a reconstructed image, and in claims 15 to 21, this method is realized. According to claims 22 to 35, a dental display system using a reconstructed image that solves the above-mentioned problems is provided. In claims 36 to 49, a recording medium that records a program for realizing the system is provided. is suggesting. The dental training method using the reconstructed image according to claim 1 is a dental training method in which a predetermined position marker is placed on each of the dental jaw model and treatment instrument, and an arbitrary cross section of the dental jaw model from the three-dimensional data of the dental jaw model. Alternatively, by generating a perspective reconstruction image and detecting the position marker with image reconstruction means for generating an arbitrary cross-sectional or perspective reconstruction image of the treatment instrument from the three-dimensional data of the treatment instrument Position measuring means for measuring the three-dimensional position and inclination of the dental jaw model and the treatment instrument, and a three-dimensional relative relationship between the tooth jaw model and the treatment instrument calculated from the data obtained by the position measurement means. According to the relationship, using the image display means for superimposing and displaying the reconstructed image of the denture model and the reconstructed image of the treatment instrument, the image display means, Changes in the state of the treatment instrument and the jaw model during dental practice, always tracking their position and inclination, and displaying the three-dimensional relationship between them by superimposing their respective reconstructed images, Practice while viewing the reconstructed image It is characterized by that.
[0015]
This dental practice method is the embodiment of the present invention having the above features embodied in the dental practice method. Since the practice is performed while viewing the reconstructed image of the tooth model and the treatment instrument displayed in a superimposed manner, the so-called blind spot is provided. There is no, and it is possible to practice accurately while observing the cross section and perspective image suitable for the practice.
[0016]
The dental training method using the reconstructed image according to claim 2 is the dental training method according to claim 1, and can further select a cross-section or a perspective view of the dental jaw model and the treatment instrument to be displayed on the image display means according to the training purpose. Image selection means, wherein the image display means superimposes and displays a reconstructed image of the dental jaw model and the treatment instrument according to the cross-section or perspective selected by the image selection means, To do.
[0117]
This dental practice method is characterized by image selection means. For example, when this image selection means displays an image obtained by superimposing a longitudinal section of a treatment instrument and an image of a section of a dental jaw model on the same plane as the longitudinal section, practical training in the vertical direction on the dental jaw model by the treatment instrument is performed. It is convenient for grasping the situation, and displaying the superimposed image of the cross section of the cutting part of the treatment instrument is convenient for grasping the training situation in the horizontal direction on the tooth jaw by the treatment instrument.
[0018]
The dental practice method using the reconstructed image according to claim 3 is the dental training method according to claim 1 or 2, wherein the position measuring means is an imaging means fixed at a predetermined position, and the imaging means is obtained from the imaging means. It is characterized by comprising the tooth jaw model and position calculating means for sequentially calculating the three-dimensional position and inclination of the treatment instrument from the position marker data.
[0019]
In this dental practice method, the position measuring means is more specifically defined. Here, a method comprising an imaging means and a position calculating means is proposed, and the position measuring means can be easily configured.
[0020]
Note that the position measuring means is not limited to this, and various ones are possible. For example, with regard to the denture model, there are those that measure by fixing the contact placed at the tip of the free arm at a predetermined position of the denture model, and those that read the position marker by reflection of laser light, etc. With regard to, there are those in which the treatment instrument itself is installed on a three-dimensional table-like object and the position and inclination thereof are measured, and those in the same manner as the tooth jaw model.
[0021]
The dental training method using the reconstructed image according to claim 4 is the dental training method according to any one of claims 1 to 3, wherein the image display means is calculated from the data obtained by the position measuring means. From the three-dimensional relative relationship, the superposed portion of the three-dimensional data of the dental jaw model and the treatment instrument is regarded as the treated portion, the treated portion is displayed, and recorded and stored as treatment data. To do.
[0022]
This dental practice method assumes that the tooth jaw can be grasped as a rigid body and regards the overlapping part of the locus of the treatment instrument and the tooth jaw model as the part cut by the cutting part of the treatment instrument, that is, the treated part. , Displayed and recorded as treatment data. Therefore, the treated part can be clearly grasped, and the treatment data can be used and reused.
[0023]
The dental training method using the reconstructed image according to claim 5 is the dental training method according to claim 4, wherein the treatment target shape of the tooth is given in advance as three-dimensional treatment target data, and the image display means The data, the treated portion, and the difference between them are displayed, and the dental practice is evaluated and a warning is issued according to the mode of the difference.
[0024]
This dental practice method further utilizes the features of claim 4 to give a treatment target shape as three-dimensional data, displays this, the treated part, and the difference part between them, and also uses this difference part to display the dental part. It is suitable for dental practice because it evaluates the practice and issues a warning.
[0025]
The dental training method using a reconstructed image according to claim 6 is the dental practice method according to any one of claims 1 to 3, wherein the image reconstructing means further includes an implant selected from three-dimensional data of an implant prepared in advance. A reconstructed image having an arbitrary cross-section or perspective view can be generated, and the image display means reconstructs the reconstructed image of the denture and jaw model so as to simulate the planting state of the implant on the denture and jaw model. The reconstructed image of the implant is movably superimposed and displayed on the screen.
[0026]
In this dental practice method, the reconstructed image is applied to an implant planting practice, and this practice can be performed more accurately.
[0027]
The dental training method using the reconstructed image according to claim 7 is the method according to claim 6, wherein the image reconstructing means is further provided on the implant prepared in advance. About the prosthesis to be worn A reconstructed image having an arbitrary cross-section or perspective view of the implant and the prosthesis can be generated, and the image display means can determine whether the implant is installed in the tooth model and the prosthesis is mounted. As can be seen in a simulated manner, the reconstructed image of the tooth and jaw model is displayed so that the reconstructed image of the implant and the prosthesis is movably superimposed and displayed. Data for production Is generated.
[0028]
This dental practice method is a reconstructed image applied to a prosthesis installation practice using an implant.This practice can be carried out accurately, and an appropriate prosthesis can be obtained without separate molding. Can be produced. The dental training system using a reconstructed image according to claim 8, wherein a predetermined position marker is provided with a tooth model, a treatment instrument, and an arbitrary cross section of the tooth model from the three-dimensional data of the tooth model. Alternatively, a perspective reconstruction image is generated, and image reconstruction means for generating an arbitrary cross-sectional or perspective reconstruction image of the treatment instrument from the three-dimensional data of the treatment instrument, and the tooth by detecting the position marker. The position measuring means for measuring the three-dimensional position and inclination of the jaw model and the treatment instrument, and the three-dimensional relative relationship between the tooth jaw model and the treatment instrument calculated from the data obtained by the position measurement means. Therefore, using the image display means that superimposes and displays the reconstructed image of the denture model and the reconstructed image of the treatment instrument, the image display means comprises: Changes in the state of the treatment instrument and the jaw model during dental practice, always tracking their position and inclination, and displaying the three-dimensional relationship between them by superimposing their respective reconstructed images, Practice while viewing the reconstructed image It is characterized by that.
[0029]
This dental training system realizes the dental training method of claim 1 and exhibits the same effect as that method. In addition, the dental training system of the following Claims 9-14 implement | achieves the dental training method of Claims 2-7, respectively, and exhibits the effect similar to those methods.
[0030]
The dental training system with a reconstructed image according to claim 9, according to claim 8,
Furthermore, the image display means includes an image selection means capable of selecting a cross-section or a perspective view of the dental jaw model to be displayed on the image display means and the treatment instrument according to a training item, and the image display means is selected by the image selection means. According to a cross-section or a perspective view, the reconstructed image of the above-described denture model and the treatment instrument is superimposed and displayed.
[0031]
The dental training system using a reconstructed image according to claim 10 is the dental training system according to claim 8, wherein the position measuring means is an imaging means fixed at a predetermined position, and the imaging means obtained from the imaging means. It is characterized by comprising the tooth jaw model and position calculating means for sequentially calculating the three-dimensional position and inclination of the treatment instrument from the position marker data.
[0032]
The dental training system using a reconstructed image according to claim 11, wherein the image display means is the tooth model and treatment instrument calculated from the data obtained by the position measuring means. From the three-dimensional relative relationship, the superposed portion of the three-dimensional data of the dental jaw model and the treatment instrument is regarded as the treated portion, the treated portion is displayed, and recorded and stored as treatment data. To do.
[0033]
The dental training system using a reconstructed image according to claim 12 is the dental training system according to claim 11, wherein a treatment target shape of a tooth is given in advance as three-dimensional treatment target data, and the image display means The data, the treated portion, and the difference between them are displayed, and the dental practice is evaluated and a warning is issued according to the mode of the difference.
[0034]
The dental training system using a reconstructed image according to claim 13 is the dental training system according to any one of claims 8 to 10, wherein the image reconstructing means further includes an implant selected from three-dimensional data of an implant prepared in advance. A reconstructed image having an arbitrary cross-section or perspective view can be generated, and the image display means reconstructs the reconstructed image of the denture and jaw model so as to simulate the planting state of the implant on the denture and jaw model. The reconstructed image of the implant is movably superimposed and displayed on the screen.
[0035]
The dental training system using a reconstructed image according to claim 14 is the dental training system according to claim 13, wherein the image reconstructing means is further applied to the implant prepared in advance. About the prosthesis to be worn A reconstructed image having an arbitrary cross-section or perspective view of the implant and the prosthesis can be generated, and the image display means can determine whether the implant is installed in the tooth model and the prosthesis is mounted. As can be seen in a simulated manner, the reconstruction image of the tooth and jaw model is displayed in such a manner that the reconstruction image of the implant and the prosthesis is movably superimposed and displayed. Data for production Is generated.
The recording medium according to claim 15 is provided with a predetermined position marker, a reconstructed image of an arbitrary cross-section or perspective view of the denture model, and a predetermined position marker from the three-dimensional data of the respective denture model. An image reconstruction step for generating a reconstructed image of an arbitrary cross-section or perspective view of the treatment device from the three-dimensional data of the treatment device, and a three-dimensional view of the tooth model and the treatment device by detecting the position marker. A reconstructed image of the tooth jaw model according to a three-dimensional relative relationship between the tooth jaw model and the treatment instrument calculated from the position measurement step for measuring the correct position and inclination, and the data obtained by the position measurement step And an image display step for displaying the reconstructed image of the treatment instrument in a superimposed manner. In the image display step, Changes in the state of the treatment instrument and the jaw model during dental practice, always tracking their position and inclination, and displaying the three-dimensional relationship between them by superimposing their respective reconstructed images, Realize a dental practice method using reconstructed images, which is characterized by performing practice while viewing the reconstructed images It is a recording of the program.
[0036]
This recording medium records a program for realizing the dental practice method of claim 1, and when this system is read and executed by a system equipped with a recording medium reader, the same effect as that method is exhibited. Can be made. In addition, the recording media of the following claims 16 to 21 are recorded with a program for realizing the dental practice method of claims 2 to 7, respectively, and this is read by a system including a recording media reader, By executing it, the same effect as that method can be exhibited.
[0037]
The recording medium according to claim 16 further includes an image selection step according to claim 15, further comprising a step of selecting a cross section or a perspective view of the dental jaw model to be displayed on the image display means and the treatment instrument in accordance with a practical purpose. In the image display step, the dental practice using the reconstructed image is characterized in that the reconstructed image of the tooth jaw model and the treatment instrument is superimposed and displayed in accordance with the cross section or the perspective view selected in the image selecting step. A program that implements the method is recorded.
[0038]
The recording medium according to claim 17 is the recording medium according to claim 15 or 16, wherein the position measurement step is based on the position marker data obtained from the imaging means fixed at a predetermined position. The program which implement | achieves the dental training method by the reconstructed image characterized by calculating sequentially the three-dimensional position and inclination of this is recorded.
[0039]
The recording medium according to claim 18 is the recording medium according to any one of claims 15 to 17, wherein the image display step is a three-dimensional view of the tooth and jaw model calculated from the data obtained by the position measurement step and the treatment instrument. Based on a reconstructed image characterized in that, from the relative relationship, the superposed portion of the three-dimensional data of the dental jaw model and the treatment instrument is regarded as a treated portion, the treated portion is displayed, and recorded and stored as treatment data This is a record of the program that implements the dental practice method.
[0040]
The recording medium according to claim 19 is the recording medium according to claim 18, wherein the treatment target shape of the tooth is given in advance as three-dimensional treatment target data, and the image display step includes the treatment target data and the treatment target data. Realized a dental practice method using a reconstructed image characterized by displaying the completed part and the difference part between them, and evaluating the dental practice and issuing a warning according to the mode of the difference part. The program to be recorded is recorded.
[0041]
A recording medium according to claim 20 is any one of claims 15 to 17,
The image reconstruction step may further generate a reconstruction image of an arbitrary cross section or perspective view of the implant selected from the three-dimensional data of the implant prepared in advance, and the image display step includes the tooth jaw The reconstructed image of the implant is movably superimposed and displayed on the reconstructed image of the tooth and jaw model so as to simulate the planting state of the implant on the model. A program for realizing a dental practice method using a composition image is recorded.
[0042]
The recording medium according to claim 21 is the recording medium according to claim 20, wherein the image reconstruction step is further performed on the implant prepared in advance. About the prosthesis to be worn A reconstructed image of an arbitrary cross-section or perspective view of the implant and the prosthesis can be generated, and the image display step includes a state in which the implant is installed in the tooth model and a state in which the prosthesis is mounted. As can be seen in a simulated manner, the reconstruction image of the tooth and jaw model is displayed in such a manner that the reconstruction image of the implant and the prosthesis is movably superimposed and displayed. Data for production The program which implement | achieves the dental practical training method by the reconstructed image characterized by having made it produce | generate is recorded.
The dental display system using a reconstructed image according to claim 22 generates a reconstructed image of an arbitrary cross section or perspective view of a tooth and jaw from three-dimensional data of the tooth and jaw obtained from a CT image, and provides a three-dimensional image of the treatment instrument. An image reconstruction unit that generates a reconstructed image of an arbitrary cross section or perspective view of the treatment instrument from the data, and a predetermined position marker is installed on each of the tooth jaw and the treatment instrument, and the position marker is detected In accordance with the three-dimensional relative relationship between the tooth jaw and the treatment instrument calculated from the data obtained by the position measurement means, the position measurement means for measuring the three-dimensional position and inclination of the tooth jaw and the treatment instrument. Using the image display means for superimposing and displaying the reconstructed image of the tooth and jaw model and the reconstructed image of the treatment instrument, the treatment by the image display means Changes in the state of the treatment instrument and the jaw and jaw model over time, always tracking their position and inclination, and displaying the three-dimensional relationship between them superimposed on their respective reconstructed images It is characterized by that.
[0043]
This dental display system is a system that replaces the tooth jaw model of the dental practice method according to claim 1 with a tooth jaw and displays a reconstructed image of the tooth jaw being treated and a treatment instrument. Therefore, the same effect as that of the dental practice method of claim 1 is exhibited even when the tooth jaw is a treatment target.
[0044]
In this case, the three-dimensional data of the tooth and jaw is obtained by analyzing the CT image, but may be three-dimensional data obtained by a method not based on this.
[0045]
The dental display system using a reconstructed image according to claim 23 is the image according to claim 22, wherein the cross section or the perspective view of the tooth jaw and the treatment instrument to be displayed on the image display means can be selected according to the treatment purpose. The image display unit includes a selection unit, and displays the reconstructed image of the tooth jaw and the treatment instrument in a superimposed manner according to the cross section or the perspective view selected by the image selection unit.
[0046]
This dental display system is characterized by image selection means as in the second aspect. Therefore, accurate treatment can be performed with the optimal screen for treatment.
[0047]
The dental display system using a reconstructed image according to claim 24 is the dental display system according to claim 22 or 23, wherein the position measuring means is an imaging means fixed at a predetermined position, and the imaging means is obtained from the imaging means. It is characterized by comprising position calculating means for sequentially calculating the three-dimensional position and inclination of the tooth jaw and the treatment instrument from the position marker data.
[004]
In this dental display system, as in the third aspect, the position measuring means is more specifically defined, and the position measuring means can be easily configured. Further, as in the third aspect, the position measuring means is not limited to this, and various ones are possible.
[004]
The dental display system using a reconstructed image according to claim 25, in any one of claims 22 to 24, wherein the image display means includes the tooth jaw and the treatment instrument calculated from the data obtained by the position measurement means. From the three-dimensional relative relationship, the superposed portion of the three-dimensional data of the tooth jaw and the treatment instrument is regarded as the treated portion, and the treated portion is displayed and recorded and stored as treatment data.
[005]
In this dental display system, similarly to claim 4, on the premise that the tooth jaw can be grasped as a rigid body, the locus of the treatment instrument and the overlapping portion of the tooth jaw are cut by the cutting portion of the treatment instrument, that is, It is regarded as a treated part, displayed, and recorded and saved as treatment data. Therefore, the treated part can be clearly grasped, and the treatment data can be used and reused.
[0051]
The dental display system using a reconstructed image according to claim 26 is the dental display system according to claim 25, wherein a treatment target shape of a tooth is given as three-dimensional treatment target data in advance, and the image display means The data, the treated part, and the difference part between them are displayed, and the treatment result is evaluated and a warning is issued according to the form of the difference part.
[005]
Similarly to claim 5, this dental display system gives the treatment target shape as three-dimensional data by further utilizing the features of claim 25, displays this, the treated part, and the difference part between them, and This difference is used to evaluate dental treatment and issue a warning, and is suitable for dental treatment.
[0053]
The dental display system with a reconstructed image according to claim 27, in any one of claims 22 to 24, the image reconstructing means further includes a three-dimensional data of an implant prepared in advance. A reconstructed image having an arbitrary cross-section or perspective view can be generated, and the image display means adds the reconstructed image of the tooth jaw to the reconstructed image of the tooth jaw so as to simulate the planting state of the implant on the tooth jaw. The reconstructed image of the implant is superimposed and displayed so as to be movable.
[0054]
This dental display system is similar to claim 6 and applies the reconstructed image to the display of the implant planting state, and helps to perform this treatment more accurately.
[0055]
The dental display system using a reconstructed image according to claim 28, in claim 27, the image reconstructing means is further provided on the implant. About the prosthesis to be worn A reconstructed image having an arbitrary cross-section or perspective view of the implant and the prosthesis can be generated, and the image display means includes a state in which the implant is implanted in the tooth jaw, a state in which the prosthesis is mounted, and an upper jaw The reconstructed image of the implant and the prosthesis are superimposed and displayed on the reconstructed image of the tooth and jaw so that the occlusal state of the lower jaw and the lower jaw are simulated.
[0056]
This dental display system, like the seventh aspect, applies the reconstructed image to the display of the wearing state of the prosthesis using the implant, and helps to perform this treatment more accurately. However, the correction of the prosthesis is a separate item.
[0057]
The dental display system using a reconstructed image according to claim 29 is the dental display system according to claim 28, wherein the implanting state of the implant and the mounting state of the prosthesis on the tooth jaw, and the upper jaw and the lower jaw are bitten by the image display means. The three-dimensional data for producing the prosthesis is generated by superimposing and displaying the reconstructed image of the implant and the prosthesis so that the combined state can be simulated. Features.
[0058]
The dental display system applies the reconstructed image to the display of the mounting state of the prosthesis using the implant, and corrects the prosthesis while observing the meshing state. Only the point at which the prosthesis is manufactured using the data is described as a separate item. Therefore, an appropriate prosthesis can be manufactured without taking a separate mold.
[0059]
A dental display system using a reconstructed image according to claim 30, in any one of claims 22 to 24, wherein the image reconstructing means further includes a three-dimensional image obtained from a CT image of a tooth constituting the tooth jaw. A reconstructed image of an arbitrary cross-section or perspective can be generated from the data, and the image display means can reconstruct the reconstructed image of the tooth jaw so that the removal state of the tooth from the tooth jaw can be simulated. From the above, the reconstructed image of the tooth is erased and displayed.
[0060]
This dental display system uses a reconstructed image to indicate the removal state of a tooth. Therefore, it is effective for pre-treatment check of tooth extraction treatment.
[0061]
The dental display system using a reconstructed image according to claim 31 is the dental display system according to any one of claims 22 to 30, wherein the position measuring means sets predetermined position markers on the upper jaw and the lower jaw of the tooth jaw, By detecting the position marker, the three-dimensional position and inclination of the upper jaw and the lower jaw are measured, and the image display means is configured to calculate the upper jaw and the lower jaw 3 calculated from the data obtained by the position measurement means. According to a dimensional relative relationship, the reconstruction image of the upper jaw and the reconstruction image of the lower jaw are superimposed and displayed, and the movement of the lower jaw with respect to the upper jaw is further displayed by the image display means. It is characterized by.
[0062]
This dental display system uses a reconstructed image to display mandibular movement. Therefore, accurate mandibular movement can be grasped without invading the patient.
[0063]
A dental display system using a reconstructed image according to claim 32, in any one of claims 22 to 30, wherein the image reconstructing means is configured to arbitrarily select a tooth from a three-dimensional data of a tooth obtained from a CT image. Generating a reconstructed image of a cross section or a perspective view of the tooth, and generating a reconstructed image of an arbitrary part of the tooth jaw from two-dimensional image data of a tooth or face obtained by using an oral camera. The means superimposes the reconstructed image of the tooth jaw and the reconstructed image of the treatment instrument while correlating the arbitrary cross section or perspective view of the tooth jaw with any portion of the tooth or face. It is configured to display, and the image display means displays a cross-sectional or perspective image of the tooth jaw and an image of the tooth or face portion.
[0064]
In this dental display system, the reconstructed image is also applied to two-dimensional image data of a tooth or a face obtained using an oral camera. Therefore, by superimposing the image of the oral camera closer to the human visual image, it is possible to obtain an image that is easier to grasp sensuously.
[0065]
The dental display system using a reconstructed image according to claim 33, wherein the image display means enlarges a reconstructed image of a cross-section or a perspective view of the tooth jaw and a reconstructed image of the tooth or face. The display is characterized in that it can be reduced or / and rotated.
[0066]
In this dental display system, a reconstructed image superimposed with an image of an oral camera is displayed so that it can be enlarged or reduced, rotated, or enlarged and reduced and rotated. Therefore, the reconstructed image can be viewed from a size and position appropriate for treatment.
[0067]
The dental display system with a reconstruction screen according to claim 34, in claims 22 to 33, the image display means further calculates and displays a distance between any two points on the reconstruction screen of the tooth and jaw. It was made to do.
[0068]
Therefore, the distance necessary for treatment can be easily obtained.
[0069]
The dental display system using a reconstructed image according to claim 35 transmits the reconstructed image data displayed by the image display means in claims 22 to 34 and uses the reconstructed image data at a remote place. And / or the reconstructed image can be displayed.
[0070]
This dental display system uses the fact that reconstructed image data including treatment data can be recorded, stored, and transmitted / received, and actively transmits this for use and display at remote locations. , Or both. Therefore, it is possible to perform treatment while receiving advice from an experienced operator at a remote place. At this time, the transmission method may be any of real time, non-real time, online, and offline.
The recording medium according to claim 36 generates a reconstructed image of an arbitrary cross-section or perspective view of a tooth from a three-dimensional data of a tooth obtained from a CT image, and the treatment instrument from the three-dimensional data of the treatment instrument. An image reconstruction step for generating a reconstructed image of an arbitrary cross-section or perspective view, and a predetermined position marker placed on each of the tooth jaw and the treatment instrument, and detecting the position marker to treat the tooth jaw and the treatment According to the position measuring step for measuring the three-dimensional position and inclination of the instrument, and the three-dimensional relative relationship between the tooth jaw and the treatment instrument calculated from the data obtained by the position measuring means, It comprises an image display step for displaying the reconstructed image and the reconstructed image of the treatment instrument in a superimposed manner. In the image display step, The position and inclination of the treatment instrument and the jaw model at the time of treatment are always tracked, and the three-dimensional relationship between the two is displayed with each reconstructed image superimposed. The program which implement | achieves the dental display system by the reconstructed image characterized by this is recorded.
[0071]
This recording medium records a program for realizing the dental display system according to claim 22. When the recording medium is read and executed by a system including a recording medium reading device, the same effect as that system is exhibited. Can be made. In addition, the recording media of the following claims 37 to 49 are recorded with a program for realizing the dental display system of claims 23 to 35, respectively, and this is read by a system including a recording medium reader. By executing it, the same effect as that system can be exhibited.
[0072]
The recording medium according to claim 37, further comprising an image selection step according to claim 36, further comprising a step of selecting a cross section or a perspective view of the tooth jaw and the treatment instrument to be displayed in the image display step according to a treatment purpose. In the image display step, a reconstructed image based dental display system characterized in that the reconstructed image of the tooth jaw and the treatment instrument is superimposed and displayed according to the cross-section or strabismus selected in the image selecting step. A program to be realized is recorded.
[0073]
A recording medium according to a thirty-eighth aspect is the recording medium according to any one of the thirty-sixth and thirty-seventh aspects, wherein the position measuring step is performed by using the position marker data obtained from imaging means fixed at a predetermined position and treating the tooth and jaw. A program for realizing a dental display system based on a reconstructed image, characterized by sequentially calculating the three-dimensional position and inclination of an appliance.
[0074]
A recording medium according to a thirty-ninth aspect is the recording medium according to any one of the thirty-sixth to thirty-eighth aspects, wherein the image display step includes a three-dimensional relative relationship between the tooth jaw and the treatment instrument calculated from the data obtained by the position measurement step. From this relationship, the superimposition portion of the three-dimensional data of the tooth jaw and the treatment instrument is regarded as the treated portion, the treated portion is displayed, and recorded and stored as the treatment data. This is a record of the program that implements the system.
The recording medium according to claim 40 is the recording medium according to claim 39, wherein the treatment target shape of the tooth is given as three-dimensional treatment target data in advance, and the image display step includes the treatment target data and The dental display by the reconstructed image is characterized in that the treated part and the difference part between the two are displayed, and the result of the treatment is evaluated and a warning is issued according to the mode of the difference part. This is a record of the program that implements the system.
[0076]
The recording medium according to claim 41, according to any one of claims 36 to 38, wherein the image reconstruction step further includes an arbitrary cross section or perspective view of an implant selected from three-dimensional data of an implant prepared in advance. In the image display step, the reconstructed image of the implant is added to the reconstructed image of the tooth jaw so that the planting state of the implant on the tooth jaw is simulated. The program which implement | achieves the dental display system by the reconfigure | reconstructed image characterized by having superimposed and displayed so that movement was possible was recorded.
[0077]
The recording medium according to claim 42 is the recording medium according to claim 41, wherein the image reconstruction step is further performed on the implant. About the prosthesis to be worn A reconstructed image of an arbitrary cross-section or perspective view of the implant and prosthesis can be generated, and the image display step includes the planting state of the implant on the tooth jaw, the mounting state of the prosthesis, and the upper jaw A reconstructed image-based dental display system that superimposes and displays the reconstructed image of the implant and prosthesis on the reconstructed image of the tooth and jaw so that the state of meshing of the lower jaw and the lower jaw is simulated A program to be realized is recorded.
[0078]
The recording medium according to claim 43 is a recording medium according to claim 42, wherein, in the image display step, the planting state of the implant on the tooth jaw, the mounting state of the prosthesis, and the meshing state of the upper jaw and the lower jaw are simulated. As can be understood from the above, the reconstruction image of the tooth and jaw is displayed so as to be movable and superimposed on the reconstructed image of the tooth and jaws, and three-dimensional data for producing the prosthesis is generated. The program which implement | achieves the dental display system by a reconstructed image is recorded.
[0079]
A recording medium according to a forty-fourth aspect of the present invention is the recording medium according to any one of the thirty-sixth to thirty-eighth aspects, wherein the image reconstruction step further includes an arbitrary one of three-dimensional data obtained from a CT image of a tooth constituting the tooth jaw. A reconstructed image of a cross-section or a perspective view can be generated, and the image display step can reconstruct the tooth from the reconstructed image of the tooth jaw so that the removal state of the tooth from the tooth jaw is simulated. A program for realizing a dental display system based on a reconstructed image, which is characterized in that a constituent image is erased and displayed, is recorded.
[0080]
According to a 45th aspect of the present invention, in the recording medium according to any one of the 36th to 44th aspects, in the position measuring step, a predetermined position marker is set on each of the upper jaw and the lower jaw of the tooth jaw, and the position marker is detected. Thus, the three-dimensional position and inclination of the upper jaw and the lower jaw are measured, and in the image display step, the three-dimensional relative relationship between the upper jaw and the lower jaw calculated from the data obtained in the position measurement step is obtained. Therefore, a dental display system using a reconstructed image is realized, wherein the reconstructed image of the upper jaw and the reconstructed image of the lower jaw are displayed in a superimposed manner to display the movement of the lower jaw relative to the upper jaw. It is a recording of the program.
[0081]
The recording medium according to claim 46 is the recording medium according to any one of claims 36 to 44, wherein in the image reconstruction step, an arbitrary cross-section or perspective view of the tooth jaw is obtained from the three-dimensional data of the tooth jaw obtained from the CT image. A reconstructed image is generated, and a reconstructed image of an arbitrary part is generated from two-dimensional image data of a tooth or a face obtained using an oral camera. In the image display step, an arbitrary cross section of the tooth or jaw A cross-section of the tooth jaw or the above by displaying the reconstructed image of the tooth jaw and the reconstructed image of the treatment instrument while superimposing the perspective view and a corresponding relationship between the tooth or an arbitrary part of the face. A program for realizing a dental display system with a reconstructed image, characterized by displaying a perspective image and an image of the tooth or face portion.
[0082]
47. The recording medium according to claim 47, wherein the image display step is capable of enlarging or reducing the reconstructed image of the cross section or perspective of the tooth and the reconstructed image of the tooth or face, or The program which implement | achieves the dental display system by the reconstructed image characterized by displaying so that it can rotate is recorded.
[0083]
A recording medium according to a 48th aspect of the present invention is the recording medium according to the 36th to 47th aspects, wherein the image display step further calculates and displays a distance between any two points on the reconstructed screen of the tooth and jaw. The program which implement | achieves the dental display system by the reconstruction screen characterized by this is recorded.
[0084]
A recording medium according to a 49th aspect is the recording medium according to the 36th to 48th aspects, wherein the reconstructed image data displayed by the image display step is transmitted and the reconstructed image data is used at a remote place, and / or A program for realizing a dental display system using a reconstructed image, which is characterized in that the reconstructed image can be displayed, is recorded.
[0085]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
[0086]
FIG. 1 is an overall configuration diagram conceptually illustrating an example of a dental training system according to the present invention.
[0087]
The dental training system 10 includes a tooth model 2 with a predetermined position marker 1, a treatment instrument 4 with a similar position marker 3, and an arbitrary model of the tooth model 2 from the three-dimensional data of the tooth model 2. A reconstructed image of the cross section or strabismus, and an image reconstructing means 5 for generating a reconstructed image of an arbitrary cross section or strabismus of the treatment instrument 4 from the three-dimensional data of the treatment instrument 4; The position measuring means 6 for measuring the three-dimensional position and inclination of the tooth jaw model 2 and the treatment instrument 4 by detecting the position, the tooth jaw model 2 calculated from the data obtained by the position measuring means 6 and the treatment According to the three-dimensional relative relationship with the instrument 4, the reconstructed image of the denture model 2 and the reconstructed image of the treatment instrument 4 are superimposed and displayed on the display unit 7a by the image display means 7 and the position measuring means 6. From the obtained data Image selection means for selecting a cross section or a perspective view of the dental jaw model 2 and the treatment instrument 4 to be displayed in accordance with the purpose of dental practice according to the three-dimensional relative relationship between the extracted tooth jaw model 2 and the treatment instrument 4 7A, an image recording means 7B for recording and storing the reconstructed image generated by the image reconstruction means 5 and superimposed and displayed by the image display means 7, an image reconstruction means 5, a position measurement means 6, an image selection means 7A, an image Related means such as a CPU (Central Processing Unit) 7C, these means 5-7B, CPU 7C, and a recording medium reading / writing means (not shown) connected to the recording means 7B and controlling these means are provided. The processing unit 9 is housed.
[0088]
Although the details of the position markers 1 and 3 will be described later, those that can be easily identified by the position measuring means 6 are used, and the position marker 1 installed on the tooth jaw model 2 and the position marker installed on the treatment instrument 4 3 may be of the same type, but the difference needs to be identified by the position measuring means 6.
[0089]
The tooth jaw model 2 is composed of an upper jaw model 2U and a lower jaw model 2L, and is designed and manufactured so as to become an average tooth jaw model from statistical data on the tooth jaws of the human body, and the three-dimensional data is already known. Here, the position marker 1 for the tooth jaw model 2 is installed only on the lower jaw model 2L. However, this depends on the purpose of the training, and only the upper jaw model 2U or, if necessary, It is necessary to install both the upper jaw model 2U and the lower jaw model 2L.
[0090]
In addition, the tooth of the model installed in the tooth jaw model 2 is expressed as S1, S2,... S8 from the front tooth according to the notation method of the tooth in usual dentistry. The case where the treatment site | part, what is called a tooth decay has generate | occur | produced is shown. This notation method for teeth is also used in the case of the human jaw described later.
[0091]
Although the treatment instrument 4 has a cutting part 4a at the tip, the meaning of this cutting part is not limited to the one that performs cutting, and dental treatment such as one that performs polishing and one that removes scales. It includes a processing unit or a processing unit for any treatment method used in the above. Moreover, this therapeutic instrument 4 is manufactured based on a design drawing, and of course, the three-dimensional data is already known. In the following, a case where cutting is performed with the treatment instrument 4 will be described.
[0092]
The position measuring means 6 includes an imaging means 6a fixed at a predetermined position, and the three-dimensional positions and inclinations of the tooth jaw model 2 and the treatment instrument 4 from the data of the position markers 1 and 3 obtained from the imaging means 6a. Is composed of position calculating means 6b for sequentially calculating. Here, the imaging means 6a is provided in two places. However, this is because both images are taken of the same position markers 1 and 3, and the difference between the images of the left and right imaging means 6a is determined. This is for calculating a three-dimensional position. Here, the two types of position markers 1 and 3 are imaged by a common set of imaging means 6 a, but different imaging means may be used for each of the position markers 1 and 3. Details of the position calculating means 6b will be described later with reference to FIG.
[0093]
For example, as shown in the display unit 7a of the image display unit 7, the image selection unit 7A overlaps the perspective of the relevant part of the treatment instrument 4 and the lower jaw model 2L until the treatment site of the lower jaw model 2L is reached. After the selected reconstructed image is selected, the treatment instrument 4 reaches the treatment site. As shown in FIG. 2, the cutting section 4a of the treatment instrument 4 has a longitudinal section and the longitudinal section thereof is flush with the longitudinal section. Selecting and displaying an image in which a cross-sectional image of the tooth S7 at the treatment site is superimposed is convenient for grasping the treatment status in the direction perpendicular to the tooth jaw by the treatment instrument. On the other hand, although not shown here, displaying a superimposed image of the cross section of the cutting portion 4a of the treatment instrument 4 is convenient for grasping the treatment status in the horizontal direction on the tooth S7 by the treatment instrument 4.
[0094]
When performing dental training using this dental training system 10, the trainee does not look at the treatment site of the treatment instrument 4 or the tooth jaw model 2, but selects an appropriate reconstructed image with the image selection means 7A. Practice is performed while viewing images of the treatment instrument 4 and the treatment site shown on the display unit 7a of the image display means 7, for example, an image as shown in the figure. Therefore, it is possible to perform the practice accurately while seeing a so-called blind spot, a cross-section suitable for the practice, and a perspective image.
[0095]
In addition, the dental training system 10 includes a recording medium 8 that can be stored separately. Using the recording medium reading / writing means, the stored reconstructed image data and treatment data can be backed up and stored. And can be copied for data use. Further, when the program that controls the overall processing steps of the system 10 is damaged, the recording medium 8 that records and stores the program for operating the system 10 is read and installed, so that the system 10 Can be recovered.
[0096]
2A to 2F are views of reconstructed images exemplarily showing the state of dental practice displayed by the image display means of the dental practice system of FIG. The state of the dental practice using the reconstructed image will be described in more detail and specifically with reference to FIG. In the following description, the same parts as those already described are denoted by the same reference numerals, and redundant description is omitted.
[0097]
The tooth S7 shown in FIG. 2A is obtained by superimposing the cross section of the tooth 7 of FIG. 1 on the same plane as the central vertical cross section of the cutting portion 4a of the treatment instrument 4. In the tooth S7, C is a treatment site, that is, a caries portion, and CA is determined empirically according to the treatment target shape, that is, the shape of the treatment site C, and is ideally given in advance as treatment target data. This is a typical cutting target shape.
[0098]
The tooth S7 is the hardest enamel Sa in the human body composition covering the upper outer side of the tooth 7, the dentin Sb being the hardest next to the enamel Sa and being the structure of the tooth 7, It is a cavity inside the dentin, and is composed of a dental pulp Sc in which blood vessels, nerves, and the like are running. The enamel Sa and the dentin Sb do not grow and regenerate in principle. Once a caries or the like is generated, a prosthetic treatment is performed such as cutting and removing the portion and filling an alternative. Here, an example of such a prosthetic treatment will be described.
[0099]
FIGS. 2A to 2F shown here do not particularly show a screen frame, but both are reconstructed images displayed on the display unit 7a of the image display means 7 of FIG. It does not represent an actual tooth. However, the present inventor has a problem in the treatment of the teeth and jaws even if the treatment result on the reconstructed image is reflected in the actual treatment result or the practice result because of the characteristic as a rigid body. It focuses on the point that there is no.
[0100]
When the treatment instrument 4 is cut from the state of FIG. 2A to the states of (b) and (c) while viewing the display on the display part 7a, the locus of the cutting part 4a of the treatment instrument 4 and the tooth 7 An overlapping portion of the image is generated. The system 10 regards the overlapping portion as the treated portion CB, sequentially records and saves it as treatment data, and displays it as shown in FIG. The system 10 calculates a difference portion between the treatment target shape CA and the treated portion CB and displays it as a difference portion CS. If the cutting is insufficient according to the mode of the difference portion, further cutting is performed by an appropriate signal. When the treatment target shape CA is likely to be exceeded, a warning is issued. The dental practice results can also be evaluated in consideration of the entire treatment process and the time required.
[0101]
Further, the result of cutting to the target shape CA while viewing the display on the display unit 7a is shown in FIG. 2 (e), and the state where the treated portion CB is filled with the filling CD is shown in FIG. 2 (f). ). It has already been explained that the training result by such a reconstructed image corresponds to the cutting result of the actual tooth jaw model 2 to the tooth 7.
[0102]
In this way, the trainee can perform the practice more accurately while clearly grasping the practice state while viewing the reconstructed image. In addition, the data of the treated part on the reconstruction screen corresponding to the actual cutting result is recorded and saved as treatment data, and can be used, reused, etc., and effectively used as a dental training history can do.
[0103]
FIG. 3 shows an example of a tooth jaw model used in the dental training system of FIG. 1, (a) is a side view with the lower jaw closed, (b) is a side view with the lower jaw opened, (c) is a front view of the state in which the denture model is incorporated in the head model and the front surface is covered with a buccal membrane, and (d) is a side view.
[0104]
As already described with reference to FIG. 1, the tooth jaw model 2 is manufactured according to the statistical average value of the human tooth jaw model, so that three-dimensional data is known and there are various types.
[0105]
Further, the connecting portion 2a between the upper jaw model 2U and the lower jaw model 2L has a structure that simulates the mandibular movement of the human body, and draws a jaw path as shown by the dotted line in FIG. Exercise. The head model A imitates the head of a human body, and the jaw model 2 can be attached to the head model A with one touch. A cheek mask 2b provided with an oral opening is attached to a portion corresponding to the upper part of the cheekbone of the head model A, and the cheek and lips of the human head are reproduced.
[0106]
Thus, dental practice can be performed with a sensation closer to the sensation of the actual human body by the head model including the tooth jaw model 2.
[0107]
4 is an external perspective view showing an example of a treatment instrument in which a position marker used in the dental training system of FIG. 1 is installed.
[0108]
The position marker 3 installed on the treatment instrument 4 includes three targets 3a, 3b, and 3c arranged in a triangular shape in space, and three arms 3d that fix these targets 3a, 3b, and 3c to the tip. 3e, 3f, and these three arms 3d, 3e, 3f are each composed of a ring 3g which is erected so as to be orthogonal to each other, and this ring 3g is fitted to an appropriate portion of the treatment instrument 4 from the outside. It is designed to be fixed and used.
[0109]
Such targets 3a, 3b, and 3c are imaged by a set of imaging means 6a, and the obtained digital image is binarized by the position calculation means 6b to calculate the respective three-dimensional positions. And based on these, the position and inclination of the whole treatment instrument 4 held by the operator's hand Jh can be obtained. In this case, the targets 3a, 3b, and 3c may be colored in different colors so that they can be easily identified and distinguished. This method can be applied to the case of the tooth jaw model 2 and the case of the tooth jaw described later.
[0110]
In addition to such a method, as shown in Japanese Patent Publication No. 50-5508 (“Mandibular Movement Detection Device”), a reflector is used as a target, and the target is irradiated with a laser beam to reflect the reflected light. A method for detecting the position and inclination of the tooth jaw by measuring, and installed at the tip of the free arm disclosed in Japanese Patent Application Laid-Open No. 60-119922 (“Method for Reproducing Mandibular Movement and Detection Device Used for the Method”) It is also possible to use a method of measuring by fixing the contactor thus fixed at a predetermined position of the tooth and jaw model.
[0111]
FIG. 5 is an external front view showing the overall configuration of the dental training system of FIG.
[0112]
The head model A provided with the dental jaw model 2 constituting the dental training system 10, the treatment instrument 4 provided with the position marker 3, the imaging means 6a, the image display means 7, and the arithmetic processing device 9 are already shown in FIG. explained.
[0113]
6c is an illumination lamp that illuminates the part imaged by the imaging means 6a, the oral cavity of the tooth jaw model 2, 10a is a prosthetic device such as a handpiece for prosthetic training, and 10b is a drawer that accommodates a cutting tool for prosthesis. 10c is a foot switch for driving the prosthetic device 10a, 10d is a vacuum mouse used for prosthetic practice, 10e is a foot switch for driving the treatment device 4, and 10f is an illumination lamp for the entire system 10 It is.
[0114]
As described above, the dental training system 10 includes the devices necessary for the dental training in addition to the devices for displaying the reconfiguration screen described above, and faces the front and back, and continuously from side to side. Since it can be installed, it is suitable for dental practice, especially for those with many people.
[0115]
FIG. 6 is an overall configuration diagram conceptually illustrating an example of the dental display system of the present invention.
[0116]
The main part of the dental display system 20 is substantially the same as the main part of the dental training system 10 of FIG. 1 except that the tooth jaw R of the human body is a treatment target instead of the tooth jaw model 2. It is. Therefore, in FIG. 1, only the differences are indicated by the reference numerals in parentheses. Among these, RU indicates the upper jaw and RL indicates the lower jaw.
[0117]
Since the entire structure of the dental display system 20 is for the human body, unlike the dental training system 10, the holding table 20a that can hold the patient in the supine position, the holding table 20a can be moved up and down, and can be rotated. The pedestal 20b and the surgeon's chair 20c are provided, and the surgeon J reconstructs the perspective of the tooth jaw R and the treatment instrument 4 on the display 7a of the image display means 7 in the same manner as described in FIG. Images can be displayed, and, as described in FIG. 2, the reconstructed images of the cross section of the tooth and the treatment instrument can be displayed, and the dental treatment can be performed accurately while viewing the display. The treatment result can also be recorded and stored as treatment data. When the human jaw is the target, unlike the tooth model, the 3D data varies from person to person, and even if the same person has a long period of time, both the deciduous and permanent tooth periods, and the permanent tooth period. Is different. Therefore, it is often necessary to obtain new three-dimensional data, and when there is no three-dimensional data, such as in the case of a new patient, it is necessary to obtain this in advance. A method for obtaining this three-dimensional data will now be described.
[0118]
FIG. 7 shows a conventional so-called X-ray CT imaging method. This conventional X-ray CT imaging method can be used as a CT image imaging method for obtaining three-dimensional data of the teeth and jaws used in the dental display system of FIG.
[0119]
The so-called CT of the so-called X-ray CT imaging means Computed Tomography, which is a fan-shaped X-ray beam 11b radiated from the X-ray generator 11 rotating around the subject 30 while changing the angle regularly. An X-ray detection element group 40 provided in a ring shape that scans across the subject 30 and keeps facing the X-ray generator 11 across the subject 30 while turning about one axis Pc. The intensity of the X-ray transmitted through the subject 30 is measured, and this is input to a computer to calculate the X-ray absorption coefficient of the pixel on the tomographic plane to be obtained, and an image of the subject 30 is created with a density proportional to the absorption coefficient. It is already widely used in medicine.
[0120]
As shown in FIG. 7, by this CT imaging method, imaging of the head HD including the dental arch S of the human body can obtain three-dimensional data of the tooth and jaw.
[0121]
FIG. 8 is an explanatory diagram of another example of a CT image capturing method for obtaining three-dimensional data of the teeth and jaws used in the dental display system of FIG.
[0122]
This imaging method is called a local irradiation X-ray CT imaging method, and an X-ray generator 11 and a two-dimensional X-ray image sensor 12 provided at both ends of a turning arm (not shown) rotating around a predetermined central axis. And the tooth desired for three-dimensional data, here, the center of the swivel arm is made to coincide with the center Pa of the tooth S8, and the swivel arm is rotated by a predetermined angle from the X-ray generator 11 in the vicinity of the tooth S8. The X-ray cone beam 11a having a very small irradiation range for irradiating the local part P is irradiated, the transmission image is captured as a digital image by the two-dimensional X-ray image sensor 12, and the digital transmission image is back-projected. By processing, the three-dimensional X-ray transmission coefficient of the local part including the tooth S8, that is, three-dimensional data can be obtained.
[0123]
This method is superior to the above-described conventional so-called X-ray CT imaging method in that three-dimensional data of only a limited local region can be obtained with a very small amount of X-ray irradiation. Here, an aggregate of the teeth S1 to S8 is indicated as a dental arch S.
[0124]
FIG. 9 shows an example of an image reconstructed by the image reconstruction means used in the dental display system of FIG. 6, and (a) shows a three-dimensional perspective view of a tooth and a reconstruction showing a specified cross section of the tooth. FIG. 5B is a diagram of a display unit that displays a reconstructed image showing a three-dimensional image of a tooth and jaws developed in a plane along the longitudinal tomographic plane of the dental arch S. FIG.
[0125]
Given the three-dimensional data of the teeth and jaws, various images can be obtained by the image reconstruction means 5 of the present invention. FIG. 9A is displayed on the display unit 7a of the image display means 7, and the left side is reconstructed based on the three-dimensional data of the tooth S7 obtained by the method of FIG. 7 or FIG. A three-dimensional perspective reconstruction image of the tooth S7 is shown.
[0126]
In this three-dimensional perspective image, as shown in the figure, if the cross section B1 is appropriately designated, the cross section image is displayed on the right side of the display unit 7a. As the cross section B1 is sequentially moved and rotated on the left side of the display unit 7a, the right cross section is displayed correspondingly. In this way, it is possible to obtain and display a reconstructed image of the desired tooth, jaw cross-section, and perspective view very conveniently. In the right part, Ra is an alveolar bone that supports the tooth S7, and Rb is a gingiva that covers the alveolar bone Ra.
[0127]
In the right cross-sectional view, as shown in the figure, when a point P1 and a point P2 are appropriately selected and a predetermined button is operated, the distance between the two points P1 and P2 is calculated and displayed. . Thus, for example, the distance between the tops of the dental pulp Sc can be easily known, which is convenient.
[0128]
The diagram of FIG. 9B is developed in a plane along the longitudinal slice plane of the dental arch S reconstructed based on the three-dimensional data of the dental arch S obtained by the method of FIG. 7 or FIG. The display part 7a which displays the reconstruction image which shows the three-dimensional image of a tooth jaw is shown.
[0129]
FIG. 10A is a diagram of a reconstructed image showing an example of an implant state displayed by the image display means of the dental display system of FIG. 6, and FIG. 10B is a bite with a prosthesis attached to the implant. It is a figure of the reconstruction image which shows a matching state.
[0130]
FIG. 10A shows the reconstructed image of the lower jaw RL and several types of implants I to be planted on the lower jaw RL on the display unit 7a. Since the teeth 6 of the lower jaw RL have been extracted, it is necessary to select the implant I and examine the optimum planting state when planting a denture here.
[0131]
In this case, the implant I is selected as appropriate, and an appropriate portion of the tooth 6 is determined and an angle is determined and the plant is simulated. When the planting state is inconvenient as indicated by a dotted line in the figure, the system 20 displays a warning or emits a warning sound. When planted at an appropriate position and angle, an OK sign is issued. When there is an OK sign, the system records and stores the data of the planting hole corresponding to the implant I as data of the treatment target shape, and uses it when drilling the hole for the implant.
[0132]
Thus, when the reconstructed image is used, the implant planting treatment can be performed accurately. At this time, if not only the image viewed from the side of the tooth 6 shown in the figure but also the image viewed from the front or the rear is displayed together, the planting state from the front and rear and the left and right directions should be examined simultaneously. Can do.
FIG. 10 (b) shows a case where an appropriate implant I is selected as shown in FIG. 10 (a), and then a prosthesis H serving as a substitute for the extracted tooth 6 is mounted, and then the upper RU and A situation where the patient is caused to engage with the lower jaw RL and the position measuring means 6 reads the movement and reconstructs the movement so that the upper jaw RU and lower jaw RL are engaged on the display unit 7a. Show.
[0134]
Thus, the prosthesis H is corrected while checking the meshing state, and when the proper meshing state is obtained, the data of the modified prosthesis H is recorded and stored and provided to the dental technician. Thus, the prosthesis can be manufactured without taking a mold for creating the prosthesis.
[0135]
In addition, the wearing state of the prosthesis H can be accurately determined. For example, if the difference in meshing contact degree between the prosthesis H and other teeth is digitized and displayed, it becomes easier to correct the prosthesis.
[0136]
In the above description, an example in which the reconstructed image is used for filling treatment and implant treatment has been described, but since the internal structure of the tooth can be viewed as a reconstructed image at the same time as the cutting portion of the treatment instrument, Conventionally, this system is very effective for root canal treatment, which has been carried out almost by groping, based on experience and intuition.
[0137]
FIG. 11 is a diagram of a reconstructed image showing an example of a tooth removal state and mandibular movement displayed by the image display means of the dental display system of FIG.
[0138]
If the upper jaw RU is attached with the upper jaw position marker 3U and the lower jaw RL with the lower jaw position marker 3L and measured by the position measuring means 6, even if the upper jaw RU moves, as shown in the figure, the upper jaw RU is moved. The movement of the lower jaw RL can be displayed on the display unit 7a as a reconstructed image, which can be used for treatment of jaw movement failure and the like.
[0139]
Further, as described with reference to FIG. 9A, since the shape of one tooth can be separated and displayed, as shown in the figure, the extracted tooth S6 is used as a reconstructed image. It can be displayed on the display unit 7a and is useful for tooth extraction treatment.
[0140]
12A is a reconstructed image showing an example of the superposition state of the camera image of the head and the X-ray image displayed by the image display means of the dental display system of FIG. 6, and FIG. It is a figure of the reconstructed image which shows an example of the superimposition state of the X-ray image of a part, and the reference line used for the analysis of a craniofacial skull, and a reference plane.
[0141]
FIG. 12A shows an image of a normal camera that captures secondary image data of the appearance of the human jaw and a skull image obtained by the Cephalo X-ray imaging method, similar to the oral camera. The image reconstructing means is used to superimpose and display on the display unit 7a.
[0142]
In this way, the relationship between the skull and the face becomes more visual and has the advantage of helping non-specialists to understand. This method can be used to compare the 2D image data from the oral camera and the 3D image data of the tooth jaw. It can also be used for superimposed display and exhibits the same effect.
[0143]
At this time, as shown in the figure, it can be enlarged or reduced, or although not shown, it can be displayed so that it can be rotated or can be enlarged and reduced and rotated. You can see the reconstructed image.
[0144]
FIG. 12B shows a reference plane and a reference line necessary for grasping the skull structure in the image of the skull obtained by the Cephalo X-ray imaging method using an image reconstruction means. 7a is superimposed and displayed and can be used for orthodontic treatment.
[0145]
Further, in the case of superimposing X-ray images, it is also possible to superimpose images reconstructed from different three-dimensional data obtained by irradiating X-rays having different intensities, that is, penetrating power, in this case, As shown in FIG. 10B and FIG. 11, not only hard tissues such as bones but also soft tissues can be displayed in a superimposed manner, and display that is easier to understand is possible. In addition, it is useful for special-purpose treatment by using a contrast agent to superimpose a specific tissue such as blood vessels and lymph glands on an image.
[0146]
FIG. 13 is a conceptual diagram showing a usage form of a reconstructed image obtained in the dental display system of the present invention at a remote place.
[0147]
The dental display system 20 is connected to another treatment room in the same hospital or a similar dental display system 20A in a remote place such as another area via a hospital LAN or a public line. The dental display system 20A includes an image display unit 7A and an arithmetic processing unit 9A similar to those of the system 20, and further includes an oral camera system 13 including an oral camera 13a and a mouse 20c as an input unit.
[0148]
In this way, this display can be performed at a remote location by transmitting the reconstructed image data and treatment data digitized online or offline or in real time or non-real time from the dental display system 20 to the dental display system 20A. While watching, it is possible to give advice to the surgeon who is performing treatment with the dental display system 20, or to use data stored and recorded.
[0149]
In addition, treatment data and prosthetic data can be recorded and stored in a recording medium, or sent to a dental technician via communication to produce a prosthesis.
[0150]
In addition, the program for operating the dental display system 20 can also be recorded and stored in a recording medium or transmitted by communication. The dental display system 20 is not operated by reading and installing the program. The system can run the same system.
[0151]
In addition, the matter demonstrated about the dental display system 20 after FIG. 6 can be applied also to the dental training system demonstrated previously by changing an object into a tooth and jaw model, and exhibits the same effect.
[0152]
【The invention's effect】
According to the dental practice method using the reconstructed image according to claim 1, the method using the reconstructed image is embodied in the dental practice method, and the reconstructed image of the tooth model and the treatment instrument displayed in a superimposed manner is used. Since the training is performed while watching, there is no so-called blind spot, and the training can be performed accurately while observing a cross-section suitable for the training or a perspective image.
[0153]
According to the dental practice method using the reconstructed image according to claim 2, in addition to the effect of the dental practice method according to claim 1, the cross section and perspective view of the treatment instrument and the tooth jaw model that are optimal for the practice are provided by the image selection means. This is convenient for grasping the training situation. According to the dental practice method using the reconstructed image according to claim 3, in addition to the effect of the dental practice method according to claim 1 or 2, the position measurement means is an image picked up at a predetermined position. Since the means and the position measuring means are more specifically defined, the position measuring means can be easily configured.
[0154]
According to the dental training method using the reconstructed image according to claim 4, in addition to the effect of the dental training method according to any one of claims 1 to 3, on the assumption that the tooth jaw can be grasped as a rigid body, The overlapping part of the locus and the jaw and jaw model is regarded as the part cut by the cutting part of the treatment instrument, that is, the treated part, displayed, and recorded and saved as treatment data, so the treated part is clearly grasped And treatment data can be used and reused.
[0155]
According to the dental practice method using the reconstructed image according to claim 5, in addition to the effect of the dental practice method according to claim 4, the treatment target shape is given as three-dimensional data by further utilizing the features of claim 4. This is the one that displays the treated part and the difference part between them, and evaluates the dental practice and issues a warning based on the difference part, and is suitable for the dental practice.
[0156]
According to the dental practice method with the reconstructed image according to claim 6, in addition to the effect of the dental practice method according to any one of claims 1 to 3, the reconstructed image is applied to the implant planting practice. Practice can be performed more accurately.
[0157]
According to the dental practice method with the reconstructed image according to claim 7, in addition to the effect of the dental practice method according to claim 6, the reconstructed image is applied to the wearing practice of the prosthesis using the implant, This practice can be performed accurately, and an appropriate prosthesis can be obtained without separate molds. Data for production Can be obtained.
[0158]
The dental training system according to claims 8 to 14 implements the dental training method according to claims 1 to 7, respectively, and exhibits the same effects as those methods.
[0159]
Each of the recording media according to claims 15 to 21 records a program for realizing the dental practice method according to claims 1 to 7, and causes a system including the recording medium reader to read and execute the program. The same effect as that method can be exhibited. According to the dental display system with a reconstructed image according to claim 22, the tooth jaw model of the dental practice method according to claim 1 is replaced with a tooth jaw, and a reconstructed image of the tooth jaw being treated and a treatment instrument is displayed. Since the system is configured to be performed, the same effect as that of the dental practice method of claim 1 is exhibited even when the tooth and jaw are treated.
[0160]
According to the dental display system by the reconstructed image according to claim 23, in addition to the effect of the dental display system according to claim 22, the image selection means similar to the image selection means of claim 2 is characterized. With the optimal screen for treatment, accurate treatment can be performed.
[0161]
According to the dental display system by the reconstructed image according to claim 24, in addition to the effect of the dental display system according to any of claims 22 or 23, the position measuring means is more specifically provided as in claim 3. Therefore, the position measuring means can be easily configured.
[0162]
According to the dental display system by the reconstructed image according to claim 25, in addition to the effect of the dental display system according to any of claims 22 to 24, the tooth jaw can be grasped as a rigid body as in claim 4. Assuming that the overlapping part of the locus of the treatment instrument and the tooth jaw is the part cut by the cutting part of the treatment instrument, that is, the treated part, it is displayed and recorded and saved as treatment data. The part can be clearly understood, and treatment data can be used and reused.
[0163]
According to the dental display system by the reconstructed image according to claim 26, in addition to the effect of the dental display system according to claim 25, as in the case of claim 5, the feature of claim 25 is further utilized to treat the treatment target. The shape is given as three-dimensional data, this and the treated part, and the difference between them are displayed, and the dental treatment is evaluated and a warning is issued by this difference, so it is suitable for dental treatment. Yes.
[0164]
According to the dental display system by the reconstructed image according to claim 27, in addition to the effect of the dental display system according to any one of claims 22 to 24, the reconstructed image can be implanted in the same manner as in claim 6. Applies to status indications and helps to better perform this treatment.
[0165]
According to the dental display system using the reconstructed image according to claim 28, in addition to the effect of the dental display system according to claim 27, the reconstructed image is attached to the prosthesis using the implant in the same manner as in claim 7. Applies to status indications and helps to better perform this treatment.
[0166]
According to the dental display system using the reconstructed image according to claim 29, in addition to the effect of the dental display system according to claim 28, the reconstructed image according to claim 7 is used to display the mounting state of the prosthesis using the implant. The prosthesis can be corrected while viewing the meshing state, and three-dimensional data of the prosthesis can be obtained.
[0167]
According to the dental display system with the reconstructed image according to claim 30, in addition to the effect of the dental display system according to any of claims 22 to 24, the reconstructed image is used to indicate the removal state of the tooth. Therefore, it is effective for pre-treatment check of tooth extraction treatment.
[0168]
According to the dental display system by the reconstructed image according to claim 31, in addition to the effect of the dental display system according to any of claims 22 to 30, the reconstructed image is used for displaying the mandibular movement. . Therefore, accurate mandibular movement can be grasped without invading the patient.
[0169]
According to the dental display system by the reconstructed image according to claim 32, in addition to the effect of the dental display system according to any of claims 22 to 30, the reconstructed image is obtained by using a mouth camera. Alternatively, since it is also applied to the two-dimensional image data of the face, an image that is easier to grasp sensuously can be obtained by superimposing the image on the oral camera closer to the human visual image.
[0170]
According to the dental display system with a reconstructed image according to claim 33, in addition to the effect of the dental display system according to claim 32, the reconstructed image superimposed on the image of the oral camera can be enlarged or reduced, or Since the display is made to be rotatable or to be able to be enlarged and reduced and rotated, the reconstructed image can be viewed from a size and a position suitable for treatment.
[0171]
According to the dental display system using the reconstruction screen according to claim 34, in addition to the effects of the dental display system according to claims 22 to 33, the image display means can be used to connect any two points on the reconstruction screen of the tooth jaw. Since the distance is calculated and displayed, the distance necessary for treatment can be easily obtained.
[0172]
According to the dental display system using the reconstructed image according to claim 35, in addition to the effects of the dental display system according to claims 22 to 34, the reconstructed image data including treatment data is recorded and saved, and transmitted and received. Since it is possible to use this, it can be actively sent and used in remote locations, displayed, or both, so we can receive advice from experienced remote surgeons. Can be treated.
[0173]
Each of the recording media according to claims 36 to 49 records a program that realizes the dental display system according to claims 22 to 35, and causes the system including the recording medium reader to read and execute the program. The same effect as that system can be exhibited.
[Brief description of the drawings]
FIG. 1 is an overall configuration diagram conceptually illustrating an example of a dental training system according to the present invention.
2A to 2F are views of reconstructed images exemplarily showing the state of dental practice displayed by the image display means of the dental practice system of FIG.
FIGS. 3A and 3B show an example of a tooth jaw model used in the dental training system of FIG. 1, wherein FIG. 3A is a side view of the lower jaw closed, FIG. 3B is a side view of the lower jaw opened; c) is a front view of the state in which the denture model is incorporated in the head model and the front surface is covered with a buccal membrane, and (d) is a side view.
4 is an external perspective view showing an example of a treatment instrument provided with a position marker used in the dental training system of FIG. 1; FIG.
5 is an external front view showing the overall configuration of the dental training system of FIG. 1. FIG.
FIG. 6 is an overall configuration diagram conceptually illustrating an example of a dental display system according to the present invention.
7 is an explanatory diagram of a conventional so-called X-ray CT imaging method, which is an example of a CT image imaging method for obtaining three-dimensional data of a tooth and jaw used in the dental display system of FIG.
FIG. 8 is an explanatory diagram of another example of a CT image capturing method for obtaining three-dimensional data of a tooth and jaw used in the dental display system of FIG. 6;
9 shows an example of an image reconstructed by the image reconstruction means used in the dental display system of FIG. 6. FIG. 9 (a) shows a three-dimensional perspective view of a tooth and the designated tooth. The figure of the reconstruction image which shows a cross section, (b) is the figure of the display part which displays the reconstruction image which shows the three-dimensional image of the tooth jaw expand | deployed planarly along the longitudinal tomographic plane of a dental arch
10A is a diagram of a reconstructed image showing an example of an implant state displayed by the image display means of the dental display system of FIG. 6, and FIG. 10B is a diagram showing a state where a prosthesis is attached to the implant. Of a reconstructed image showing the engaged state
11 is a diagram of a reconstructed image showing an example of a tooth removal state and mandibular movement displayed by the image display means of the dental display system of FIG. 6;
12A is a diagram of a reconstructed image showing an example of a superimposed state of a head camera image and an X-ray image displayed by the image display means of the dental display system of FIG. 6, and FIG. The figure of a reconstructed image showing an example of the superposition state of the X-ray image of the head and the reference line used for analyzing the maxillofacial skull and the reference plane
FIG. 13 is a conceptual diagram showing a usage form of a reconstructed image obtained in the dental display system of the present invention at a remote place.
[Explanation of symbols]
1 Position marker
2 Tooth jaw model
2U maxilla model
2L lower jaw model
3 Position marker
4 therapeutic instruments
5 Image reconstruction means
6 Position measuring means
6a Imaging means
6b Position calculation means
7 Image display means
7A Image selection means
7B Image recording means
7C CPU (Central processing means)
8 Recording media
9 Arithmetic processing unit
10 Dental training system
11 X-ray generator
12 Two-dimensional X-ray image sensor
13 Oral camera
20 Dental display system
A head model
B cross section
C treatment site
CA treatment target shape
CB treated part (superimposed part)
CC filling
I implant
H prosthesis
R tooth jaw
RU upper jaw
RL lower jaw
S dental arch
S1-S8 teeth
F face

Claims (49)

  1. The place marker, tooth jaw model installed in each, and the treatment instrument,
    A reconstructed image of an arbitrary cross section or perspective view of the tooth jaw model is generated from the three-dimensional data of the tooth jaw model, and a reconstructed image of an arbitrary cross section or perspective view of the treatment instrument from the three-dimensional data of the treatment instrument Image reconstruction means for generating
    Position measuring means for measuring a three-dimensional position and inclination of the tooth jaw model and the treatment instrument by detecting the position marker;
    The reconstructed image of the denture model and the reconstructed image of the treatment instrument are superimposed according to the three-dimensional relative relationship between the denture model and the treatment instrument calculated from the data obtained by the position measuring means. And image display means for displaying
    The image display means always keeps track of the position and inclination of the state change between the treatment instrument and the jaw model during dental training, and superimposes the reconstructed images on the three-dimensional relationship between the two. A dental practice method using a reconstructed image, wherein the practice is performed while viewing the reconstructed image.
  2. In claim 1,
    Further, the image display means includes an image selection means capable of selecting a cross section or a perspective view of the dental jaw model and the treatment instrument to be displayed on the image display means in accordance with a training purpose ,
    The image display means superimposes and displays a reconstructed image of the tooth model and the treatment instrument according to the cross-section or perspective selected by the image selecting means. Practice method.
  3. In either claim 1 or 2,
    A position where the position measuring means sequentially calculates an imaging means fixed at a predetermined position, and a three-dimensional position and inclination of the tooth model and the treatment instrument from the data of the position marker obtained from the imaging means; A dental practice method using a reconstructed image, characterized by comprising calculation means.
  4. In any one of Claims 1-3,
    The image display means treats a superimposed portion of the three-dimensional data of the tooth jaw model and the treatment instrument from the three-dimensional relative relationship between the tooth jaw model and the treatment instrument calculated from the data obtained by the position measurement means. A dental practice method using a reconstructed image, characterized in that the treated part is displayed, the treated part is displayed, and recorded and stored as treatment data.
  5. In claim 4,
    Furthermore, the treatment target shape of the tooth is given in advance as three-dimensional treatment target data,
    The image display means displays the treatment target data, the treated part, and a difference part between them, and evaluates dental practice and issues a warning according to the form of the difference part. A dental practice method using reconstructed images.
  6. In any one of Claims 1-3,
    The image reconstruction means can further generate a reconstructed image of an arbitrary cross-section or perspective view of an implant selected from three-dimensional data of a previously prepared implant ,
    The image display means movably superimposes and displays the reconstructed image of the implant on the reconstructed image of the tooth and jaw model so that the planting state of the implant on the tooth and jaw model can be understood in a simulated manner. A dental practice method based on a reconstructed image characterized by the above.
  7. In claim 6,
    The image reconstruction means can further generate a reconstructed image of an arbitrary cross section or perspective view of the implant and the prosthesis for the prosthesis to be mounted on the implant prepared in advance .
    The image display means displays the implant and the prosthesis on the reconstructed image of the tooth and jaw model so as to simulate the planting state of the implant on the tooth and jaw model and the mounting state of the prosthesis. to display by superimposing a reconstructed image movably dental training method according to the reconstructed image, characterized in that to produce data for manufacturing work of the prosthesis.
  8. The place marker, tooth jaw model installed in each, and the treatment instrument,
    Generates a reconstructed image of an arbitrary cross section or perspective view of the denture model from the 3D data of the denture model, and generates a reconstructed image of an arbitrary cross section or perspective view of the treatment instrument from the 3D data of the treatment instrument Image reconstruction means to perform,
    Position measuring means for measuring a three-dimensional position and inclination of the tooth jaw model and the treatment instrument by detecting the position marker;
    The reconstructed image of the denture model and the reconstructed image of the treatment instrument are superimposed according to the three-dimensional relative relationship between the denture model and the treatment instrument calculated from the data obtained by the position measuring means. And image display means for displaying
    The image display means always keeps track of the position and inclination of the state change between the treatment instrument and the jaw model during dental training, and superimposes the reconstructed images on the three-dimensional relationship between the two. A dental training system using a reconstructed image, which is displayed and viewed while viewing the reconstructed image.
  9. In claim 8,
    Further, the image display means includes an image selection means capable of selecting a cross-section or a perspective view of the tooth and jaw model to be displayed on the image display means in accordance with a training item, and the image display means is selected by the image selection means. A dental training system using a reconstructed image, wherein the reconstructed image of the tooth jaw model and the treatment instrument is superimposed and displayed according to a cross-section or a perspective view.
  10. In either of claims 8 or 9,
    A position where the position measuring means sequentially calculates an imaging means fixed at a predetermined position, and a three-dimensional position and inclination of the tooth jaw model and the treatment instrument from the data of the position marker obtained from the imaging means; A dental training system based on a reconstructed image, characterized by comprising calculation means.
  11. In any one of Claims 8-10,
    The image display means treats a superimposed portion of the three-dimensional data of the tooth jaw model and the treatment instrument from the three-dimensional relative relationship between the tooth jaw model and the treatment instrument calculated from the data obtained by the position measurement means. A dental training system using a reconstructed image, which is regarded as a completed part, displays the treated part, and records and saves it as treatment data.
  12. In claim 11,
    Furthermore, the treatment target shape of the tooth is given in advance as three-dimensional treatment target data,
    The image display means displays the treatment target data, the treated part, and a difference part between them, and evaluates dental practice and issues a warning according to the form of the difference part. A dental training system using reconstructed images.
  13. In any one of Claims 8-10,
    The image reconstruction means can further generate a reconstructed image of an arbitrary cross-section or perspective view of an implant selected from three-dimensional data of a previously prepared implant ,
    The image display means movably superimposes and displays the reconstructed image of the implant on the reconstructed image of the tooth and jaw model so that the planting state of the implant on the tooth and jaw model can be simulated. A dental training system using reconstructed images characterized by the above.
  14. In claim 13,
    The image reconstruction means can further generate a reconstructed image of an arbitrary cross section or perspective view of the implant and the prosthesis for the prosthesis to be mounted on the implant prepared in advance .
    The image display means reconstructs the implant and the prosthesis in the reconstructed image of the tooth and jaw model so that the planting state of the implant on the tooth and jaw model and the mounting state of the prosthesis can be simulated. A dental training system based on a reconstructed image, wherein the image is displayed so as to be movable and superimposed to generate data for manufacturing a prosthesis.
  15. Its therapeutic predetermined position marker, from the three-dimensional data of an arbitrary cross section or a reconstructed image perspective, therapeutic instruments installed a predetermined position marker of the tooth jaw model from the three-dimensional data of the dental jaw model installed in each An image reconstruction step for generating an arbitrary cross-sectional or perspective reconstruction image of the instrument;
    A position measuring step of measuring a three-dimensional position and inclination of the tooth jaw model and the treatment instrument by detecting the position marker;
    The reconstructed image of the denture model and the reconstructed image of the treatment instrument are superimposed according to the three-dimensional relative relationship between the denture model and the treatment instrument calculated from the data obtained in this position measurement step. Image display step to display
    In the image display step , changes in the state of the treatment instrument and the jaw model at the time of dental practice are always tracked for their positions and inclinations, and the reconstructed images are superimposed on the three-dimensional relationship between them. The recording medium which recorded the program which implement | achieves the dental training method by the reconstructed image characterized by performing training, displaying and seeing the reconstructed image.
  16. In claim 15,
    Furthermore, an image selection step that can select a cross-section or a perspective view of the dental jaw model and the treatment instrument to be displayed on the image display means according to the purpose of the training ,
    In the image display step, a dental practice method using a reconstructed image, wherein the reconstructed image of the tooth jaw model and the treatment instrument is superimposed and displayed according to the cross-section or strabismus selected in the image selecting step. A recording medium that records a program for realizing the above.
  17. In claim 15 or 16,
    The position measurement step is to sequentially calculate the three-dimensional position and inclination of the dental jaw model and the treatment instrument from the data of the position marker obtained from the imaging means fixed at a predetermined position. A recording medium recording a program for realizing a dental practice method using a characteristic reconstructed image.
  18. In any one of Claims 15-17,
    The image display step treats a superimposed portion of the three-dimensional data of the dental jaw model and the treatment instrument from the three-dimensional relative relationship between the tooth jaw model and the treatment instrument calculated from the data obtained in the position measurement step. The recording medium which recorded the program which implement | achieves the dental training method by the reconstructed image characterized by displaying this treated part as a completed part, and recording and saving as treatment data.
  19. In claim 18,
    Furthermore, the treatment target shape of the tooth is given in advance as three-dimensional treatment target data,
    In the image display step, the treatment target data, the treated part, and a difference part between the two are displayed, and dental practice is evaluated and a warning is issued according to the form of the difference part. The recording medium which recorded the program which implement | achieves the dental training method by the reconstructed image characterized by the above-mentioned.
  20. In any one of Claims 15-17,
    The image reconstruction step can further generate a reconstruction image of an arbitrary cross section or perspective view of the implant selected from the three-dimensional data of the previously prepared implant , and the image display step includes the tooth jaw The reconstructed image of the implant is movably superimposed and displayed on the reconstructed image of the tooth and jaw model so as to simulate the planting state of the implant on the model. A recording medium on which a program for realizing a dental practice method using a composition image is recorded.
  21. In claim 20,
    The image reconstruction step may further generate a reconstructed image of an arbitrary cross section or perspective view of the implant and the prosthesis for a prosthesis to be attached to the implant prepared in advance .
    The image display step reconstructs the implant and the prosthesis in the reconstructed image of the tooth and jaw model so that the planting state of the implant on the tooth and jaw model and the mounting state of the prosthesis can be simulated. A recording medium on which a program for realizing a dental training method using a reconstructed image is generated, wherein data for manufacturing a prosthesis is generated by superimposing and displaying an image.
  22. A reconstructed image of an arbitrary cross section or perspective view of the tooth jaw is generated from the three-dimensional data of the tooth jaw obtained from the CT image, and a reconstructed image of an arbitrary cross section or perspective view of the treatment instrument is generated from the three-dimensional data of the treatment instrument. Image reconstructing means for generating
    A position measuring means for setting a predetermined position marker on each of the tooth jaw and the treatment instrument, and measuring the three-dimensional position and inclination of the tooth jaw and the treatment instrument by detecting the position marker;
    The reconstructed image of the denture model and the reconstructed image of the treatment instrument are superimposed and displayed according to the three-dimensional relative relationship between the tooth jaw and the treatment instrument calculated from the data obtained by the position measuring means. Using image display means to
    By the image display means, the state change between the treatment instrument and the jaw model during treatment is always tracked, and their position and inclination are always tracked, and the three-dimensional relationship between the two is superimposed on the respective reconstructed images. dental display system according reconstructed image and displaying.
  23. In claim 22,
    Further, the image display means includes an image selection means capable of selecting a cross-section or a perspective view of the tooth and jaw to be displayed on the image display means in accordance with a treatment purpose ,
    The dental display system using a reconstructed image, wherein the image display means superimposes and displays the reconstructed image of the tooth jaw and the treatment instrument according to the cross-section or perspective selected by the image selecting means.
  24. 24. Either of claims 22 or 23.
    The position measuring means sequentially calculates the three-dimensional position and inclination of the tooth jaw and the treatment instrument from the imaging means fixed at a predetermined position and the position marker data obtained from the imaging means. And a dental display system using a reconstructed image.
  25. In any one of Claims 22-24,
    The image display means calculates a superposed portion of the three-dimensional data of the tooth jaw and the treatment instrument from the three-dimensional relative relationship between the tooth jaw and the treatment instrument calculated from the data obtained by the position measurement means. A dental display system using a reconstructed image, characterized in that the treated portion is displayed and recorded as treatment data.
  26. In claim 25,
    Furthermore, the treatment target shape of the tooth is given in advance as three-dimensional treatment target data,
    The image display means displays the treatment target data, the treated part, and a difference part between them, and evaluates the treatment result and issues a warning according to the form of the difference part. The dental display system by the reconstructed image characterized by this.
  27. In any one of Claims 22-24,
    The image reconstruction means can further generate a reconstruction image of an arbitrary cross section or perspective view of an implant selected from three-dimensional data of a previously prepared implant ,
    The image display means displays the reconstructed image of the implant so as to be movably superimposed on the reconstructed image of the tooth so as to simulate the planting state of the implant on the tooth and jaw. A dental display system based on a reconstructed image.
  28. In claim 27,
    The image reconstruction means can further generate a reconstructed image of an arbitrary cross section or perspective view of the implant and the prosthesis for the prosthesis to be mounted on the implant prepared in advance.
    The image display means includes the reconstructed image of the tooth jaw so as to simulate the planting state of the implant on the tooth jaw, the mounting state of the prosthesis, and the meshing state of the upper jaw and the lower jaw. A dental display system based on a reconstructed image, wherein the reconstructed image of an implant and a prosthesis is superimposed and displayed.
  29. In claim 28,
    Reconstruction of the implant and the prosthesis so that the image display means simulates the planting state of the implant on the tooth jaw, the mounting state of the prosthesis, and the meshing state of the upper jaw and the lower jaw A dental display system using a reconstructed image, wherein the three-dimensional data for producing a prosthesis is generated by superimposing and displaying the image in a movable manner.
  30. In any one of Claims 22-24,
    The image reconstruction means can further generate a reconstructed image of an arbitrary cross section or perspective view from the three-dimensional data obtained from the CT image of the tooth constituting the tooth jaw,
    The image display means erases and displays the reconstructed image of the tooth from the reconstructed image of the tooth so that the removal state of the tooth from the tooth and jaw is simulated. Dental display system with reconstructed images as features.
  31. In any one of Claims 22-30,
    The position measuring means is configured to measure a three-dimensional position and inclination of the upper jaw and the lower jaw by installing predetermined position markers on the upper jaw and the lower jaw of the tooth jaw and detecting the position markers. ,
    The image display means superimposes the reconstructed image of the upper jaw and the reconstructed image of the lower jaw in accordance with the three-dimensional relative relationship between the upper jaw and the lower jaw calculated from the data obtained by the position measuring means. It is configured to display,
    A dental display system using a reconstructed image, wherein the movement of the lower jaw relative to the upper jaw is further displayed by the image display means.
  32. In any one of Claims 22-30,
    The image reconstruction means generates a reconstructed image of an arbitrary cross section or perspective view of the tooth jaw from the three-dimensional data of the tooth jaw obtained from the CT image , and at the same time the tooth or face obtained using the oral camera. It is from the two-dimensional image data configured to generate a reconstructed image of any part of the tooth jaw,
    The image display means provides a reconstructed image of the tooth jaw and a reconstructed image of the treatment instrument while correlating any cross section or perspective view of the tooth jaw with any portion of the tooth or face. It is configured to superimpose and display,
    A dental display system using a reconstructed image, wherein the image display means displays a cross-sectional or perspective image of the tooth jaw and an image of the tooth or face portion.
  33. In claim 32,
    The image display means displays a reconstructed image of a cross section or a perspective view of the tooth jaw and a reconstructed image of the tooth or face so as to be capable of being enlarged / reduced or / and rotated. Dental display system by image.
  34. In claims 22-33,
    The dental display system using a reconstruction screen, wherein the image display means further calculates and displays a distance between any two points on the reconstruction screen of the tooth and jaw.
  35. In claims 22-34,
    Reconstructed image data displayed by the image display means is transmitted, and the reconstructed image data can be used and / or displayed at a remote place. Dental display system with images.
  36. A reconstructed image of an arbitrary cross section or perspective view of the tooth jaw is generated from the three-dimensional data of the tooth jaw obtained from the CT image, and a reconstructed image of an arbitrary cross section or perspective view of the treatment instrument is generated from the three-dimensional data of the treatment instrument. An image reconstruction step to generate
    A position measuring step of setting a predetermined position marker on each of the tooth jaw and the treatment instrument and measuring the three-dimensional position and inclination of the tooth jaw and the treatment instrument by detecting the position marker;
    The reconstructed image of the denture model and the reconstructed image of the treatment instrument are superimposed and displayed according to the three-dimensional relative relationship between the tooth jaw and the treatment instrument calculated from the data obtained by the position measuring means. Image display step to
    In the image display step, the state change between the treatment instrument and the jaw model during treatment is always tracked, and the three-dimensional relationship between the two is superimposed on each reconstructed image. recording medium for recording a program for realizing the dental display system by reconstructed image and displaying.
  37. In claim 36,
    Furthermore, an image selection step is provided that can select a cross-section or a perspective view of the tooth jaw and the treatment instrument to be displayed in the image display step according to the treatment purpose ,
    In the image display step, a reconstructed image based dental display system characterized in that the reconstructed image of the tooth jaw and the treatment instrument is superimposed and displayed according to the cross-section or strabismus selected in the image selecting step. A recording medium on which a program to be realized is recorded.
  38. In either of claims 36 or 37
    The position measuring step sequentially calculates a three-dimensional position and inclination of the tooth jaw and the treatment instrument from the data of the position marker obtained from the imaging means fixed at a predetermined position. The recording medium which recorded the program which implement | achieves the dental display system by the reconstructed image to do.
  39. In any of claims 36 to 38,
    In the image display step, from the three-dimensional relative relationship between the tooth jaw and the treatment instrument calculated from the data obtained in the position measurement step, a superposed portion of the three-dimensional data of the tooth jaw and the treatment instrument is treated. A recording medium on which is recorded a program for realizing a dental display system using a reconstructed image, characterized in that the treated portion is displayed and recorded and stored as treatment data.
  40. In claim 39,
    Furthermore, the treatment target shape of the tooth is given in advance as three-dimensional treatment target data,
    In the image display step, the treatment target data, the treated portion, and a difference portion between them are displayed, and the treatment result is evaluated and a warning is issued according to the form of the difference portion. The recording medium which recorded the program which implement | achieves the dental display system by the reconstructed image characterized by the above-mentioned.
  41. In any of claims 36 to 38,
    The image reconstruction step can further generate a reconstructed image of any cross-section or perspective of the selected implant from pre- prepared 3D data of the implant ,
    In the image display step, the reconstructed image of the implant is movably superimposed and displayed on the reconstructed image of the tooth jaw so as to simulate the planting state of the implant on the tooth jaw. The recording medium which recorded the program which implement | achieves the dental display system by the reconstructed image characterized by having performed.
  42. In claim 41,
    The image reconstruction step may further generate a reconstructed image of an arbitrary cross section or perspective view of the implant and the prosthesis for a prosthesis to be attached to the implant prepared in advance .
    In the image display step, the reconstructed image of the tooth and jaws is used to simulate the planting state of the implant on the tooth and the mounting state of the prosthesis, and the meshing state of the upper and lower jaws. A recording medium recording a program for realizing a dental display system using a reconstructed image, wherein the reconstructed image of an implant and a prosthesis is superimposed and displayed.
  43. In claim 42,
    In the reconstructed image of the tooth jaw, the image display step simulates the planting state of the implant on the tooth jaw, the mounting state of the prosthesis, and the meshing state of the upper jaw and the lower jaw. A program for realizing a dental display system based on a reconstructed image is recorded , wherein the reconstructed image of the implant and the prosthesis is movably superimposed and displayed to generate three-dimensional data for producing the prosthesis. Recording medium.
  44. In any of claims 36 to 38,
    The image reconstruction step can further generate a reconstructed image of an arbitrary cross-section or perspective view from the three-dimensional data obtained from the CT image of the tooth constituting the tooth jaw,
    In the image display step, the reconstructed image of the tooth is erased from the reconstructed image of the tooth and displayed so that the removal state of the tooth from the tooth jaw is simulated. A recording medium on which a program for realizing a dental display system using a characteristic reconstructed image is recorded.
  45. In any of claims 36 to 44,
    In the position measurement step, a predetermined position marker is set on each of the upper jaw and the lower jaw of the tooth jaw, and the three-dimensional position and inclination of the upper jaw and the lower jaw are measured by detecting the position marker ; and
    In the image display step, the reconstructed image of the upper jaw and the reconstructed image of the lower jaw are superimposed according to the three-dimensional relative relationship between the upper jaw and the lower jaw calculated from the data obtained in the position measuring step. A recording medium on which a program for realizing a dental display system using a reconstructed image is displayed, wherein the movement of the lower jaw relative to the upper jaw is displayed.
  46. In any of claims 36 to 44,
    In the image construction step, a reconstructed image of an arbitrary cross-section or perspective view of the tooth and jaw is generated from the three-dimensional data of the tooth and jaw obtained from the CT image , and the tooth or face 2 obtained using the oral camera is used. Generate a reconstructed image of any part from the dimensional image data ,
    In the image step, the reconstructed image of the tooth jaw and the reconstructed image of the treatment instrument are superimposed while correlating the arbitrary cross section or perspective view of the tooth jaw with any portion of the tooth or face. A recording recording a program for realizing a dental display system with a reconstructed image, characterized in that the cross-sectional or perspective image of the tooth jaw and the image of the tooth or face portion are displayed. Medium.
  47. In claim 46,
    The image display step displays a reconstructed image of a cross-section or a perspective view of the tooth jaw and a reconstructed image of the tooth or face so as to be able to be enlarged / reduced or / and rotated. A recording medium recording a program for realizing a dental display system using images.
  48. In claims 36-47,
    The image display step further records a program for realizing a dental display system using a reconstruction screen, wherein the distance between any two points on the reconstruction screen of the tooth and jaw is calculated and displayed. Recording medium.
  49. In claims 36-48,
    The reconstructed image data displayed by the image display step is transmitted, and the reconstructed image data can be used and / or displayed at a remote place. A recording medium recording a program for realizing a dental display system using images.
JP22647499A 1999-08-10 1999-08-10 Dental practice method using a reconstructed image, dental practice system, recording medium recording a program realizing the method, dental display system using a reconstructed image, and recording medium recording a program realizing the system Expired - Lifetime JP3720221B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP22647499A JP3720221B2 (en) 1999-08-10 1999-08-10 Dental practice method using a reconstructed image, dental practice system, recording medium recording a program realizing the method, dental display system using a reconstructed image, and recording medium recording a program realizing the system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP22647499A JP3720221B2 (en) 1999-08-10 1999-08-10 Dental practice method using a reconstructed image, dental practice system, recording medium recording a program realizing the method, dental display system using a reconstructed image, and recording medium recording a program realizing the system

Publications (2)

Publication Number Publication Date
JP2001051593A JP2001051593A (en) 2001-02-23
JP3720221B2 true JP3720221B2 (en) 2005-11-24

Family

ID=16845676

Family Applications (1)

Application Number Title Priority Date Filing Date
JP22647499A Expired - Lifetime JP3720221B2 (en) 1999-08-10 1999-08-10 Dental practice method using a reconstructed image, dental practice system, recording medium recording a program realizing the method, dental display system using a reconstructed image, and recording medium recording a program realizing the system

Country Status (1)

Country Link
JP (1) JP3720221B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104123874A (en) * 2014-08-13 2014-10-29 苏州迪凯尔医疗科技有限公司 Dental real-time training and evaluation device, dental real-time training and evaluation system and dental real-time training and evaluation method
KR101810040B1 (en) 2016-12-02 2017-12-18 주식회사 디오 control method for automatic dental preparation system
KR101810038B1 (en) 2016-12-02 2017-12-26 주식회사 디오 automatic dental preparation system

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0015683D0 (en) * 2000-06-28 2000-08-16 Depuy Int Ltd Apparatus for positioning a surgical instrument
JP4405734B2 (en) * 2001-05-31 2010-01-27 イメージ ナビゲーション リミティド Image guided transplantation
JP4696407B2 (en) 2001-06-20 2011-06-08 株式会社ニコン Product recommendation system and product recommendation method
DE60235096D1 (en) * 2001-06-20 2010-03-04 Nikon Corp Image editing
DE10217630A1 (en) 2002-04-19 2003-11-13 Robert Riener Method and device for learning and training dental treatment methods
DE10313829B4 (en) * 2003-03-21 2005-06-09 Aesculap Ag & Co. Kg Method and device for selecting an image section from an operating area
BE1015916A3 (en) * 2004-02-25 2005-11-08 Clerck Rene De MARKING ELEMENT AND METHOD FOR DETERMINING THE POSITION OF A dental implant.
JP5184870B2 (en) * 2007-11-28 2013-04-17 国立大学法人 新潟大学 Intraoral X-ray photography training evaluation system
JP5550148B2 (en) * 2011-01-27 2014-07-16 株式会社長田中央研究所 Dental treatment equipment
GB201108002D0 (en) * 2011-05-13 2011-06-29 Materialise Dental Nv Method and system for establishing the shape of the occlusal access cavity in endodontic treatment
GB201108003D0 (en) * 2011-05-13 2011-06-29 Materialise Dental Nv Endodontic treatment simulation system
CN103083106A (en) * 2011-11-03 2013-05-08 医百科技股份有限公司 Tooth implantation guidance system
JP2013117451A (en) * 2011-12-02 2013-06-13 Emu Kobo:Kk Position attitude estimation mark and position attitude estimation device using the same
EP2872065A1 (en) * 2012-07-12 2015-05-20 AO Technology AG Method for generating a graphical 3d computer model of at least one anatomical structure in a selectable pre-, intra-, or postoperative status
JP6242041B2 (en) * 2012-08-02 2017-12-06 株式会社モリタ Medical simulation device
US20140309523A1 (en) * 2013-04-16 2014-10-16 Navigate Surgical Technologies, Inc. Three-dimensional extraction tracking for implant modeling
CN104224329B (en) * 2013-06-18 2017-08-25 台湾植体科技股份有限公司 Dental handpiece accessory system and its operating method
JP5791761B1 (en) * 2014-05-21 2015-10-07 株式会社モリタ製作所 Display device for root canal treatment, root canal treatment unit, and method for operating display device for root canal treatment
JP5781667B1 (en) 2014-05-28 2015-09-24 株式会社モリタ製作所 Root canal therapy device
JP6346032B2 (en) * 2014-08-22 2018-06-20 株式会社リガク Image processing apparatus, image processing method, and image processing program
KR101799428B1 (en) * 2015-10-30 2017-11-20 동의대학교 산학협력단 Medical practice apparatus, teeth model and the contorolling method thereof
JP6293110B2 (en) * 2015-12-07 2018-03-14 株式会社Hielero Point cloud data acquisition system and method
JP6649912B2 (en) * 2017-03-15 2020-02-19 株式会社モリタ Dental practice training device and dental practice training system
KR102062129B1 (en) * 2017-11-29 2020-02-11 주식회사 다윈테크 Dental extraction training system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104123874A (en) * 2014-08-13 2014-10-29 苏州迪凯尔医疗科技有限公司 Dental real-time training and evaluation device, dental real-time training and evaluation system and dental real-time training and evaluation method
KR101810040B1 (en) 2016-12-02 2017-12-18 주식회사 디오 control method for automatic dental preparation system
KR101810038B1 (en) 2016-12-02 2017-12-26 주식회사 디오 automatic dental preparation system

Also Published As

Publication number Publication date
JP2001051593A (en) 2001-02-23

Similar Documents

Publication Publication Date Title
US10610107B2 (en) Methods and systems for creating and interacting with three dimensional virtual models
US9877642B2 (en) Device for viewing an interior of a mouth
CN210727927U (en) Intraoral scanning system
US10052160B2 (en) Robotic surgery system
KR102114015B1 (en) Virtually designing a customized healing abutment
US10166088B2 (en) Unified three dimensional virtual craniofacial and dentition model and uses thereof
JP6616475B2 (en) Dental preparation guide
US20190216580A1 (en) Dynamic virtual articulator for simulating occlusion of teeth
Karatas et al. Three-dimensional imaging techniques: A literature review
US20180153659A1 (en) System and method for effective planning, visualization, and optimization of dental restorations
Akyalcin et al. Diagnostic accuracy of impression-free digital models
JP6223331B2 (en) Three-dimensional measuring device used in the dental field
Mah et al. Current status and future needs in craniofacial imaging
EP2134290B1 (en) Computer-assisted creation of a custom tooth set-up using facial analysis
DK2651328T3 (en) Method and system for the design and manufacture of person-specific orientation aids for dentures
Uechi et al. A novel method for the 3-dimensional simulation of orthognathic surgery by using a multimodal image-fusion technique
EP1759353B1 (en) Method for deriving a treatment plan for orthognatic surgery and devices therefor
Rosati et al. Digital dental cast placement in 3-dimensional, full-face reconstruction: a technical evaluation
CN106537225B (en) Visualization device for interior of oral cavity of patient
US20160157970A1 (en) Assisted dental implant treatment and replication system
US20140205966A1 (en) Human body information extraction device, human body imaging information reference plane conversion method, and cross section information detection device
JP5374382B2 (en) Methods and systems for dental planning and production
KR101590330B1 (en) Method for deriving shape information
JP5586691B2 (en) Design and creation of patient-specific restorations from intraoral scanning of digital impression coping
US8364301B2 (en) Surgical guides and methods for positioning artificial teeth and dental implants

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20030425

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20040624

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20040831

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20041028

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20050112

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20050314

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20050314

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20050809

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20050907

R150 Certificate of patent or registration of utility model

Ref document number: 3720221

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

Free format text: JAPANESE INTERMEDIATE CODE: R150

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20090916

Year of fee payment: 4

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20090916

Year of fee payment: 4

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20100916

Year of fee payment: 5

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20100916

Year of fee payment: 5

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110916

Year of fee payment: 6

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120916

Year of fee payment: 7

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130916

Year of fee payment: 8

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

EXPY Cancellation because of completion of term