KR102573907B1 - Method for editing arch line and tooth arrangement design apparatus thereof - Google Patents

Abstract

An arch line correction method and a tooth arrangement design device thereof are disclosed. An arch line correction method and tooth arrangement design device according to an embodiment automatically corrects and displays the arch line of the opposite jaw when correcting a partial arch line targeting an arch line that is a standard for tooth arrangement, and thus correcting time and procedure of the opposite jaw Convenience can be improved by reducing

Description

Method for editing arch line and tooth arrangement design apparatus thereof {Method for editing arch line and tooth arrangement design apparatus thereof}

The present invention relates to image analysis and processing technology, and more particularly, to digital dental diagnosis and treatment plan establishment technology through image analysis.

When establishing a dental treatment plan using digital dental treatment, it is possible to establish a more stable treatment plan by predicting and configuring the improved tooth arrangement from the current tooth condition. Since the tooth model in the digital environment can move freely in a 3-dimensional direction, various treatment plans can be established. At this time, if a virtual arch line is set as a standard in order to arrange teeth more neatly and regularly, away from free tooth model movement, and the tooth model is arranged according to the standard, better results can be derived.

In general, a virtual arch line allows a commercial wire for treatment to be presented and used so that it can be applied according to the surgeon's situational judgment. The surgeon can proceed with the treatment by selecting an arch line of appropriate size or shape for the patient's oral structure among various commercially available arch lines. Alternatively, the surgeon may manually generate an arch line according to the patient's individual condition and proceed with the treatment.

In order to determine an appropriate treatment method, a setup work is required to create virtual setup data so that teeth are arranged in an ideal form by establishing a diagnosis and treatment plan from tooth image data in software before dental treatment. . In order to create an arch line that is used as a standard when creating setup data, it is generally based on the experience and knowledge of the operator. Teeth arranged based on the arch line created based on the experience and knowledge of the surgeon are not suitable for accurately solving various patients' problems.

The arch line, which is one of the important elements as a criterion for tooth arrangement in dental treatment, is used as a criterion when creating a tooth arrangement set-up when establishing a treatment plan. The arch line creation based on the experience and knowledge of the surgeon can be created based on various standards or use the widely used arch line through commercialization. The teeth arranged on the arch line created in this way are not suitable for accurately solving various patients' problems. In addition, since it involves the process of separately working and comparing each arch line, the procedure is complicated and the accuracy is low.

Korean Registered Patent No. 10-1862749 (registered on May 24, 2018)

We propose an arch line correction method and a tooth array design device that can increase the accuracy of the arch line correction work, which is the standard for the planned tooth arrangement, and shorten the work time.

According to an embodiment, a method of correcting an arch line serving as a standard for tooth arrangement using a tooth arrangement design device includes displaying, by the tooth arrangement design device, arch lines of a partial jaw and an opposite jaw on a tooth image, and an arch line of a partial jaw. A step of receiving a user manipulation signal for correction, a step of correcting the arch line of a partial arch according to the user's manipulation, and automatically correcting and displaying an arch line of the opposite arch along with the correction of the arch line of the partial arc.

In the step of displaying the arch line of the partial jaw and the opposite jaw, the upper arch line and the lower arch line are displayed together in the upper dental image, and the lower arch line and the upper arch line are displayed together in the lower dental image. , the arch line of both jaws can be displayed simultaneously on a single orthognathic tooth image.

In the step of automatically correcting and displaying the arch line of the opposite jaw, the arch line of the opposite jaw may be corrected together by reflecting the occlusal information of the upper and lower teeth.

The step of automatically correcting and displaying the arch line of the opposite jaw includes: correcting the arch line information of the partial jaw according to the correction of the arch line of the partial jaw, and correcting the occlusal range of the opposite jaw according to the correction of the arch line information of the partial jaw; Recalculating the information of the opposite jaw line by reflecting the corrected occlusal range of the opposite jaw; It may include a step of displaying with a line.

The method for correcting the arch line may further include at least one of displaying occlusion regions of the upper and lower jaws, respectively, and displaying occlusion points that determine the occlusion regions of the upper and lower jaws, respectively.

In the step of displaying the upper and lower occlusal areas, the occlusal area including the central fossa area and lingual cusp area of the upper jaw and the buccal cusp area and central fossa area of the lower jaw may be displayed.

In the step of displaying the occlusion points, it is possible to display the occlusion points including the central fossa and lingual cusp of the upper jaw and the buccal cusp and central fossa of the lower jaw, which determine the occlusion area for each individual tooth. may coincide with the buccal cusp of the lower jaw or be located within a predetermined range, and the lingual cusp of the upper jaw may coincide with the central fossa of the lower jaw or be located within a predetermined range.

The method of correcting the arch line may further include checking a correction history of the arch line of the opposite jaw and preventing re-correction of the arch line of the opposite jaw when it is confirmed that there is a previous correction history.

The method of correcting the arch line may further include ignoring the correction history of the opposite malice and automatically correcting the archline of the opposite malformation when a request for automatic correction of the archline of the opposite malformation is made by a user's manipulation.

The step of automatically correcting and displaying the arch line of the opposing jaw includes: activating the correction history flag of the partial jaw when correcting the arch line of the partial jaw by user manipulation; If the occlusion tolerance is exceeded, and if a request for automatic correction of the arch line of the opposite jaw is received by user manipulation, the revision history flag of the opposite jaw is deactivated, the occlusal range of the opposite jaw is corrected, and the arch line of the opposite jaw is corrected. steps may be included.

In the step of automatically correcting and displaying the arch line of the opposite jaw, if the occlusion tolerance is exceeded, if there is no request for automatic correction of the arch line of the opposite jaw by user manipulation, check whether the revision history flag of the opposite jaw is active and oppose when inactive. Correcting the occlusion range of the jaw and correcting the arch line of the opposite jaw may be further included.

An apparatus for designing a tooth arrangement according to another embodiment includes a data acquisition unit that acquires a tooth image of a patient, an input unit that receives a user manipulation signal, an output unit that outputs a tooth image, and a tooth image acquired through the data acquisition unit. Includes a control unit that displays the arch line of the partial jaw and the opposite jaw through the output unit, and when receiving a user manipulation signal for correcting the arch line of the partial jaw through the input unit, corrects the arch line of the partial jaw and corrects the arch line of the opposite jaw and displays it through the output unit can do.

According to the method for correcting an arch line and the device for designing the arrangement of teeth thereof according to an embodiment, when correcting a partial arch line, the arch line of the opposite jaw is automatically corrected and displayed, thereby reducing the correction time and procedure of the opposite jaw, thereby improving convenience. .

Furthermore, as the arch line of the partial jaw and the arch line of the opposite jaw are simultaneously displayed on the dental image of the partial jaw, it is easy for the user to check the occlusion relationship. accuracy can be improved.

1 is a view showing the configuration of a tooth arrangement design device according to an embodiment of the present invention;
2 is a diagram showing the flow of an arch line correction method according to an embodiment of the present invention;
3 is a view showing an upper jaw tooth image and a lower jaw tooth image displaying an arch line and occlusion information according to an embodiment of the present invention;
4 is a diagram showing a video screen expressing an arch line according to an embodiment of the present invention;
5 is a view showing an example of occlusion conditions for automatically correcting the arch line of the opposite jaw according to an embodiment of the present invention;
6 is a view showing a) normal occlusal relationship and b) abnormal occlusal relationship according to an embodiment of the present invention;
7 is a view showing an upper and lower occlusion relationship according to an embodiment of the present invention;
8 is a view showing a tooth image screen displaying an occlusion area according to an embodiment of the present invention;
9 is a view showing a tooth image screen displaying an occlusion point according to an embodiment of the present invention;
10 is a diagram illustrating a detailed flow of a method for correcting an arch line according to an example of the present invention.

Advantages and features of the present invention, and methods for achieving them, will become clear with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and only the present embodiments make the disclosure of the present invention complete, and common knowledge in the art to which the present invention belongs It is provided to fully inform the holder of the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numbers designate like elements throughout the specification.

In describing the embodiments of the present invention, if it is determined that a detailed description of a known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted, and the terms described later will be used in the embodiments of the present invention. These terms are defined by reflecting the functions of, and may vary depending on the user's or operator's intention or custom. Therefore, the definition should be made based on the contents throughout this specification.

Combinations of each block of the accompanying block diagram and each step of the flowchart may be executed by computer program instructions (execution engine), and these computer program instructions are executed by a processor of a general-purpose computer, special-purpose computer, or other programmable data processing device. Since it can be mounted, the instructions executed through the processor of a computer or other programmable data processing device create means for performing the functions described in each block of the block diagram or each step of the flowchart.

These computer program instructions may also be stored in a computer usable or computer readable memory that can be directed to a computer or other programmable data processing device to implement functionality in a particular way, such that the computer usable or computer readable memory The instructions stored in are also capable of producing an article of manufacture containing instruction means for performing the functions described in each block of the block diagram or each step of the flow chart.

And since the computer program instructions can also be loaded on a computer or other programmable data processing device, a series of operational steps are performed on the computer or other programmable data processing device to create a computer-executed process to create a computer or other programmable data processing device. It is also possible that the instructions for performing the data processing apparatus provide steps for executing the functions described in each block of the block diagram and each step of the flowchart.

In addition, each block or each step may represent a module, segment, or portion of code that includes one or more executable instructions for executing specified logical functions, and in some alternative embodiments may refer to blocks or steps. It should be noted that it is also possible for functions to occur out of order. For example, two blocks or steps shown in succession may in fact be performed substantially concurrently, or the blocks or steps may be performed in the reverse order of their corresponding functions, if necessary.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the embodiments of the present invention exemplified below may be modified in many different forms, and the scope of the present invention is not limited to the embodiments described below. The embodiments of the present invention are provided to more completely explain the present invention to those skilled in the art.

1 is a diagram showing the configuration of a tooth arrangement design device according to an embodiment of the present invention.

Referring to FIG. 1 , a tooth arrangement design device (hereinafter, referred to as a 'design device') 1 performs tooth arrangement design to help orthodontics, prosthesis, dentures, and the like in actual dentistry. The tooth arrangement design task is to obtain the patient's tooth image data, diagnose and analyze the tooth image data through software control, perform simulation, establish a treatment plan, and rearrange the teeth according to the established treatment plan. refers to a series of processes for producing tooth set-up data. The tooth arrangement can be applied to orthodontics, prosthetics, and dentures. The patient's tooth image data may include at least one of CT data, mouth data, and facial data, or data obtained by matching two or more.

The design device 1 according to an embodiment may include an electronic device capable of executing tooth arrangement design software and a server communicating with the electronic device through a network. Electronic devices include computers, notebook computers, laptop computers, tablet PCs, smart phones, mobile phones, personal media players (PMPs), personal digital assistants (PDAs), and the like.

The arch line, which is the criterion for tooth alignment, can be used as a review item when confirming the treatment goal or target tooth alignment before performing tooth alignment. The design device 1 provides a technology that allows the user to simultaneously check and modify the upper and lower arch lines when the user wants to modify the arch line created by the user or suggested by the design device 1. To this end, the design device 1 displays the arch line of the opposite jaw together with the arch line of the partial jaw in the partial jaw tooth image, so that the occlusion relationship can be easily confirmed.

The design device 1 may automatically correct and display the arch line of the opposing jaw when the user corrects the already created arch line of the partial jaw. Accordingly, when correcting a bias, it is possible to correct the opposite evil at the same time, so convenience is improved. When correcting the user's arch line, information on the arch line of the opposite jaw of the corrected partial jaw may be corrected in consideration of the occlusal relationship and then displayed together. Accordingly, when correcting a partial jaw, the opposite jaw can be corrected together while maintaining the accuracy of the tooth arrangement in consideration of the arch line information of the opposite jaw due to the characteristics of the tooth arrangement having an occlusion relationship. That is, it has an effect of improving accuracy and convenience.

When the user corrects the already created arch line of the partial jaw, the design device 1 may correct the occlusal range of the opposite jaw and express the corrected arch line of the opposite jaw together according to the corrected occlusal range of the opposite jaw. In this case, the user can correct the arch line while checking the occlusion relationship. Accordingly, it is possible to use an accurate arch line while securing user convenience.

Hereinafter, with reference to drawings to be described later, a method of displaying the arch line of both jaws together and a technique of automatically correcting the arch line of the opposite jaw when correcting the arch line of the one jaw will be described in detail later.

Referring to FIG. 1 , a design device 1 according to an embodiment includes a data acquisition unit 10, a storage unit 12, a control unit 14, an input unit 16, and an output unit 18.

The data acquisition unit 10 acquires tooth image data from the patient. Tooth image data required for treatment may include at least one of CT data, oral data, and facial data, or data obtained by matching two or more. Furthermore, it may further include a cephalo-lateral photograph, panoramic data, cephalometric X-ray data, PA X-ray data, and the like.

The scan data is data having information obtained by scanning real teeth including damaged teeth. The scan data may be tooth model scan data obtained by scanning a gypsum model created by imitating the patient's oral cavity with a 3D scanner. As another example, it may be intraoral scan data obtained by scanning the inside of the patient's oral cavity using a 3D intra-oral scanner. Acquired scan data may be stored in the storage unit 12 .

CT data may be obtained by generating tomographic images of the patient's head using CT (Computed Tomography, computed tomography), segmenting (SegmentationOn) the boundary of a tooth part in each tomographic image, and then combining them into one. These scan data and CT data are images obtained by photographing the upper jaw from below the upper teeth with the patient's mouth open, images obtained by photographing the lower teeth from above the lower teeth with the patient's mouth open, and images obtained by photographing the local area with the mouth closed. imaging, oral radiographs, etc. The obtained CT data may be stored in the storage unit 12 . CT data may be data in a three-dimensional form. Through CT data, soft tissue, which is external information on the face, skeletal structure, and oral information, which are internal information, can be obtained and used in dental treatment.

The controller 14 may prepare data before analyzing the patient's tooth image data. Data preparation may include data matching, individual tooth separation, feature information extraction, and reference information extraction. Data matching is matching at least two pieces of data constituting tooth image data.

The control unit 14 according to an embodiment displays an arch line serving as a reference for tooth arrangement in the tooth image obtained from the data acquisition unit 10 through the output unit 18 . At this time, the control unit 14 may manually generate the arch line by a user manipulation signal through the input unit 16, or may automatically generate the arch line. As an example of automatic arch line generation, the control unit 14 determines the arch line range by reflecting skeletal information (additional oral information can be reflected), and then sets the occlusion condition including the relationship between adjacent teeth and occlusal teeth within the determined arch line range. The arch line can be automatically created by reflecting it. An arch line may be created using the patient's skeletal information, both skeletal information and oral cavity information, or oral cavity information. As an example of the occlusion condition, there is a condition that the maxillary arch line is larger than the mandibular arch line and is positioned toward the soft tissue, and the mandibular arch line is positioned toward the lingual side relative to the maxillary arch line.

After generating the arch line, the control unit 14 receives a user manipulation signal for correcting the arch line of the partial jaw through the input unit 16, corrects the arch line of the opposite jaw together with the correction of the arch line of the partial jaw, and outputs the output unit 18 ) can be displayed. In this case, when the user corrects the size, 　shape, 　position, etc. of the 　shape, 　position, etc. of the 　form, 　position, etc. of the archline in the partial jaw tooth image, the size, 　shape, 　position, etc. The user can check the arch line information of the opposite jaw in the partial jaw tooth image, and when correcting the arch line of the opposite jaw in the partial jaw tooth image, the arch line of the opposite jaw can be automatically corrected by reflecting the arch line information of the partial jaw to the opposite jaw.

After correcting the arch line, the control unit 14 may arrange the teeth by moving individual teeth along the corrected arch line.

The storage unit 12 stores various data such as information necessary for the operation of the design device 1 and information generated according to the operation. The storage unit 12 may provide the controller 14 with data necessary for data analysis by the controller 14 . Arch line correction history may be stored in the storage unit 12 .

The output unit 18 displays a screen according to the operation of the control unit. For example, an arch line, an arrangement of teeth, and the like may be displayed on tooth image data. The output unit 18 may simultaneously display the arch lines of both jaws on one side jaw tooth image. For example, the maxillary arch line and the mandibular arch line may be displayed together in the maxillary tooth image, and the mandibular arch line and the maxillary arch line may be displayed together in the mandibular dental image. It is easy to check the occlusion relationship by displaying the arch line of the corresponding partial jaw and the arch line of the opposite jaw at the same time in the partial jaw tooth image. When correcting the arch line of the partial jaw through the control unit 14 according to the user's request, the output unit 18 may display the corrected arch line of the partial jaw and the automatically corrected arch line of the opposite jaw together on the partial jaw dental image.

The input unit 16 receives a user manipulation signal. For example, the input unit 16 may receive an operation signal for generating an arch line or may receive an operation signal for correcting the created arch line. In addition, a user manipulation signal for requesting activation of user automatic correction may be input. A manipulation signal for user modification, such as movement or rotation of the tooth arrangement data displayed on the screen, may be input.

2 is a diagram illustrating the flow of a method for correcting an arch line according to an embodiment of the present invention.

Referring to FIGS. 1 and 2 , the design device 1 displays arch lines of the partial jaw and the opposite jaw on the tooth image (S210). The design device 1 may generate an arch line by receiving a user manipulation signal, or may automatically generate an arch line. Creation of an arch line by user manipulation For example, when a user inputs minimum points for creating an arch line, an arch line may be created by connecting the input minimum points.

Automatic arch line creation For example, based on skeletal and oral information, the range of available arch lines is determined, and within the range of the determined arch line, adjacent teeth for each upper and lower jaw are closely adhered to and the structure of the structure that can maintain the occlusal relationship Create an arch line. Calculate the range in which the root of the tooth can be located in the skeleton of the maxilla and mandible, consider the angle information that the crown of the tooth has with the occlusal plane, and arrange the teeth of an occlusal structure in which all teeth in the upper jaw can cover all teeth in the lower jaw An arch line can be created to enable this. That is, the maxillary arch line should be larger than the mandibular arch line and should be positioned toward the soft tissue, and the mandibular arch line may be positioned toward the lingual side compared to the maxillary arch line.

In the arch line display step ( S210 ), the design device 1 may simultaneously display the arch lines of both jaws on one side jaw tooth image. For example, the maxillary arch line and the mandibular arch line may be displayed together in the maxillary tooth image, and the mandibular arch line and the maxillary arch line may be displayed together in the mandibular dental image. It is easy to check the occlusion relationship by displaying the arch line of the corresponding partial jaw and the arch line of the opposite jaw at the same time in the partial jaw tooth image.

In the arch line display step ( S210 ), the design device 1 may display the arch line range. When the arch line of one side is displayed, the range of possible arch lines of the opposite side is additionally displayed, so the user can simultaneously check the information of the arch line of both sides. Rather than checking the teeth in the occlusal state, this displays the information of the arch line of the opposite jaw together with the arch line information of the opposite jaw while checking the arch line information of the partial jaw located on the occlusal surface, so that the user can check the dental condition of the partial jaw and It allows to know the position where the teeth of the opposite jaw should occlude. At this time, the ranges of the upper and lower arch lines may be adjusted by the occlusion relationship between the upper and lower teeth.

In the arch line display step ( S210 ), the design device 1 may display occlusal information together with the upper and lower arch lines.

For example, the occlusal regions of the upper and lower jaws may be respectively displayed. At this time, the occlusal region including the central fossa region and lingual cusp region of the upper jaw and the buccal cusp region and central fossa region of the lower jaw may be displayed.

As another example, the occlusion points that determine the occlusion regions of the upper and lower jaws may be displayed for each individual tooth. At this time, it is possible to display the occlusion point including the central fossa and lingual cusp of the upper jaw and the buccal cusp and central fossa of the lower jaw, which determine the occlusion area for each individual tooth. A normal occlusion relationship may be that the central fossa of the upper jaw coincides with the buccal cusp of the lower jaw or is located within a predetermined range, and the lingual cusp of the upper jaw coincides with the central fossa of the lower jaw or is located within a predetermined range.

Next, the design device 1 receives a user manipulation signal for correcting the arch line of the bias (S220). The corresponding step (S220) corresponds to a case where the user modifies the arch line created by the user or the arch line suggested by the design device 1. For example, at least one of the size, shape, and position of the deflection arch line may be corrected.

Next, the design device 1 corrects the arch line of the partial jaw according to the user's manipulation for correcting the arch line of the partial jaw, and automatically corrects and displays the arch line of the opposite jaw along with the correction of the arch line of the partial arc (S230).

In the step of automatically correcting and displaying the arch line of the opposite jaw (S230), when the user corrects the size, shape, position, etc. The size, 　shape, 　position, etc. of the evil arch line can be automatically corrected together. In this case, if the user sets a setting to prevent automatic correction of the opposite malice, it is possible to support correction of only the arch line of the opposite malice.

The user can check the arch line information of the opposite jaw in the partial jaw tooth image, and when correcting the arch line of the opposite jaw in the partial jaw tooth image, the arch line of the opposite jaw can be automatically corrected by reflecting the arch line information of the partial jaw to the opposite jaw. At this time, 　 first corrects the arch line of the partial music, which has many problems and has a high priority, and 　 when correcting the arch line of the corresponding partial music, the arch line of the other evil can be automatically corrected and displayed. Accordingly, when the user corrects the arch line for one instrument, the result of the arch line correction automatically reflected in the other instrument can be checked at the same time.

In general, when a user corrects the arch line for one arc, the same operation must be repeatedly performed for the opposite arc. However, according to the correction method according to an embodiment, since the user only needs to correct the arch line for one side, the work procedure required for the opposite side can be omitted. Thus, the procedure is reduced and convenience is improved.

In the step of automatically correcting and displaying the arch line of the opposite jaw (S230), the design device 1 may also correct the arch line of the opposite jaw by reflecting the occlusal information of the upper and lower teeth. When correcting the arch line of the partial jaw, if the information on the arch line of the opposite jaw is automatically corrected by considering the occlusal relationship between the upper and lower teeth, the correction time and procedure of the opposite jaw can be reduced and convenience can be increased. In addition, when correcting the arch line of the partial jaw, the accuracy of the occlusal relationship can be increased when correcting the arch line by automatically correcting the arch line of the other jaw by reflecting the occlusal information of the upper and lower teeth.

According to an embodiment in which the arch line of the opposite jaw is corrected together by reflecting the occlusal information, the design device 1 corrects the arch line information of the partial jaw according to the correction of the arch line of the partial jaw, and the arch line of the opposite jaw according to the correction of the arch line information of the partial jaw. Correct the occlusion range. Then, the arch line information of the opposing jaw is recalculated by reflecting the corrected occlusion range of the opposing jaw. Subsequently, the opposite malar arch line may be corrected by reflecting the recalculated opposite malar arch line information, and the corrected opposite malar arch line may be displayed together with the partial arc arch line.

The arch line information includes the range of available arch lines based on the patient's skeletal and oral information, the range of arch lines that satisfy the structure that allows adjacent teeth to adhere closely and maintain occlusion, and the location of the roots of teeth in the upper and lower jaw skeleton. The range of arch lines that can be arranged in an occlusal structure so that all teeth in the upper jaw can cover all teeth in the lower jaw, in consideration of the available range and the angle information that the crown of the teeth has with the occlusal surface, that is, the alignment of the teeth in the upper jaw The arch line should be larger than the arch line of the mandibular tooth alignment and should be positioned toward the soft tissue, and there is a range of arch lines to arrange the mandibular tooth alignment arch line toward the lingual side.

For example, the area smaller than the buccal length (BL) of the maxillary molar or the area reflecting the occlusal information can be calculated as the possible arch line range to recalculate the lower arch line information using the maxillary arch line information. can For recalculation of the maxillary arch line information using the mandibular arch line information, for example, an area larger than the buccal length (BL) of the lower molars or an area reflecting the occlusal point information can be calculated as the possible arch line range. there is.

In the step of automatically correcting and displaying the arch line of the opposite jaw (S230), the design device 1 checks the revision history of the arch line of the opposite jaw, and if it is confirmed that there is a previous revision history, it is possible to prevent re-correction of the arch line of the opposite jaw. there is. If the occlusion tolerance is exceeded while correcting the arch line of the partial jaw, the occlusal relationship must be reexamined. In that case, the arch line of the opposite jaw is automatically corrected. However, if the user previously corrected and confirmed the opposite evil information, additional modification should not occur, and thus, automatic correction of the opposite evil can be prevented in that case. To this end, the design device 1 may modify the arch line of the opposite jaw only when there is no user confirmation with flag information for checking whether or not the opposite jaw has been corrected. To this end, the design device 1 stores the correction history when correcting the user's arch line, and prevents automatic correction of the arch line of the opposite jaw when the correction history exists so that the correction history is not changed.

The above-mentioned automatic correction prevention function enables automatic correction only when there is no previous correction history by the user, and if there is a previous correction history by the user, a function to prevent re-correction so as not to lose information already modified by the user. am. In order to apply the corresponding function, the design device 1 may additionally provide a function of recording and checking the user modification history. For example, the design device 1 automatically corrects the opposite malice arch line when the opposite malice revision history flag is deactivated (opposite evil Flag = Off) by using a revision history flag that can check whether or not the user's opposite malice arch line has been modified. and when the corresponding correction history flag is activated (opposite evil flag = On), automatic correction of the arch line of the opposite evil can be prevented.

The user can activate automatic correction of the arch line of the opposite malice as needed. For example, when a request for automatic correction of the arch line of the opposite malice is made by user manipulation, the archline of the opposite malice may be automatically corrected ignoring the revision history of the opposite malice. The user's request for automatic correction of the arch line may take precedence over the case where automatic generation of the opposite jaw arch line is stopped due to a history of already correcting the arch line. When automatically correcting the arch line at the request of the user, it is possible to maintain the automatic correction by changing the existing revision history flag to an inactive state (opposite evil Flag = Off).

Next, the design device 1 may arrange the teeth by correcting the arch lines of the partial and opposite jaws, and then moving individual teeth along the corrected arch lines (S240). Thereafter, the design device 1 may further perform functions of establishing a treatment plan, performing treatment, providing results according to treatment, and confirming a prognosis.

FIG. 3 is a diagram illustrating an upper jaw tooth image and a lower jaw tooth image displaying an arch line and occlusion information according to an embodiment of the present invention.

Referring to FIGS. 1 and 3 , the design device 1 may display the arch line of the partial jaw together with the arch line of the other jaw for each partial jaw tooth image. For example, the mandibular arch line 321 may be simultaneously displayed on the maxillary arch line 311 of the maxillary tooth image 31, and the maxillary arch line 312 may be displayed on the mandibular arch line 322 of the mandibular tooth image 32. ) can be displayed simultaneously. If the upper and lower arch lines are created separately, a problem may occur in the occlusal relationship, but as the upper and lower arch lines are created together, the user can check the occlusal relationship.

In this case, occlusal information other than the arch line may be additionally displayed while simultaneously displaying the upper and lower arch lines. The occlusal information may be in the form of an occlusal area, a line, or a point. The occlusal line may have shape and length information, and the occlusal area may have shape and width information. Display contents can be adjusted and combined according to user settings. In FIG. 3 , intersection points 331 and 332 are shown as an example of occlusal information.

The occlusion relationship between the two jaws should be reviewed and the arch line should be corrected to the extent that occlusion problems do not occur. Therefore, it is possible to provide a user interface capable of checking the range calculation procedure reflecting the occlusion relationship and the arch line of both jaws at once.

4 is a diagram illustrating an image screen expressing an arch line according to an embodiment of the present invention.

Referring to Figures 1 and 4, when using a general round arch line, there is a high possibility that an error will occur due to the schematic arrangement without clearly examining the position of the teeth. Accordingly, the design device 1 according to an embodiment provides a curved arch line 400 in which the shape of teeth is reflected, thereby providing predictability and accuracy of tooth arrangement.

The shape of the arch line 400 may be displayed in a conventional round format, midline 420, anterior teeth, posterior teeth reflection, a method in which only the labial outline is visible, a method in which the entire tooth outline 430 is visible, or a combination of the above methods. . When the upper and lower jaws are simultaneously displayed, the line 410 dividing the anterior teeth and the posterior teeth, the left and right regions, and the shape of the teeth may be additionally displayed.

5 is a diagram showing an example of occlusion conditions for automatically correcting the arch line of the opposite jaw according to an embodiment of the present invention.

Occlusal refers to a related relationship between upper and lower teeth. The maxillary teeth have a larger shape than the mandibular teeth, which has a shape in which the upper teeth cover the lower teeth. In addition, the upper and lower teeth should have a relationship in which one tooth contacts two teeth of the opposite jaw. For example, as shown in FIG. 5 , the maxillary canines (upper #3 teeth) are located between the mandibular canines (mandibular #3 teeth) and the first premolar (mandibular #4 teeth). The above conditions can be determined and modified by the user, and at this time, the set user conditions have the highest priority and are reflected when deriving the occlusal relationship.

6 is a diagram showing a) normal occlusion relationship and b) abnormal occlusion relationship according to an embodiment of the present invention, and FIG. 7 is a diagram showing an upper and lower occlusion relationship according to an embodiment of the present invention.

An example of occlusal information that serves as a standard for automatic correction of the arch line of the opposite jaw when correcting the arch line of the partial jaw is as follows. Adjacent teeth must be closely spaced. For example, the maxillary canines are located between the mandibular canines and the first premolars. In the normal occlusal relationship, the maxillary posterior tooth arrangement is larger toward the buccal than the mandibular posterior tooth arrangement. That is, the area from the central fossa to the lingual cusp of the upper jaw should be the same as the area from the buccal cusp to the central fossa of the lower jaw.

More specifically, the most ideal condition is that the fossa and cusp of each tooth match the designated position. The central fossa 711 of the upper jaw coincides with the buccal cusp 712 of the lower jaw or is located within a predetermined range, and the lingual cusp 721 of the upper jaw corresponds to the central fossa of the lower jaw 722 or may be located within a predetermined range. For example, the mesio lingual cusp of the maxillary first molar coincides with the central fossa of the mandibular first molar or is located within a predetermined range. All the buccal cusps of the maxillary teeth are located more buccal than all the buccal cusps of the mandibular teeth. All buccal cusps of the mandibular teeth are located more lingual than all the buccal cusps of the maxillary teeth.

When the above items are basically included, the upper and lower arch lines created to enable tooth alignment can be modified together, and the arch line for tooth alignment that can reflect additional information according to the diagnosis result of the surgeon can be modified. The modified arch line can be applied when arranging teeth or for the purpose of checking the result of aligning teeth.

8 is a diagram illustrating a tooth image screen displaying an occlusion area according to an embodiment of the present invention.

Referring to FIGS. 1 and 8 , the design device 1 includes a central fossa area 811-lingual cusp area 821 of the upper posterior teeth and a buccal cusp area of the lower posterior teeth ( 812) - The central fossa area 812 can be displayed together. At this time, the two regions (eg, the central fossa region 811 of the upper jaw and the buccal cusp region 812 of the lower jaw, the lingual cusp region 821 of the upper jaw and the central fossa region 822 of the lower jaw) coincide or within a preset range Since the normal occlusal relationship can be maintained only when located within the arch, the degree of overlap of the corresponding area can be displayed on the arch line.

9 is a diagram illustrating a tooth image screen displaying an occlusion point according to an embodiment of the present invention.

Referring to FIGS. 1 and 9 , the design device 1 may display information on the upper central fossa and lingual cusp, and the lower buccal cusp and central fossa, which determine the occlusal area, on the arch line. For example, in the case of the upper jaw, the central fossa 900 and the lingual cusp 910 may be displayed.

10 is a diagram illustrating a detailed flow of a method for correcting an arch line according to an example of the present invention.

Referring to FIGS. 1 and 10 , the design device 1 corrects the arch line of the partial music by user manipulation (S1010) and corrects the arch line information of the partial music. When correcting the arch line of the partial music (S1010), the revision history flag of the partial music may be activated (flag for partial music = ON) (S1020). When the bias correction history flag is activated (bias flag = ON), the automatic correction of the arch line of the bias can be prevented until the user requests automatic correction.

Subsequently, when correcting the arch line of the partial jaw, the design device 1 checks whether the occlusal range of the upper and lower teeth needs to be corrected according to the corrected arch line information, for example, whether the upper and lower occlusion range is exceeded (S1030). ).

At this time, if the occlusion tolerance is exceeded (= Yes), the design device 1 tries to correct the arch line of the opposite jaw. First, it is checked whether a request for automatic correction of the arch line of the opposite jaw by user manipulation has been input. Do (S1040). If the user's automatic correction request is received (= Yes), the correction history flag of the opposite evil may be deactivated (opposite evil Flag = Off) (S1050) in order to automatically correct the opposite evil arch line according to the user's request, which is a priority.

Subsequently, the design device 1 checks whether the correction history flag of the opposite jaw is active (opposite jaw Flag = On) (S1070), and if it is not active (= No), corrects the occlusal range of the opposite jaw (S1070) and opposes As the evil arch line is corrected (S1080), the arch line correction can be completed (S1090). The automatic correction of the arch line of the opposite evil is possible only when the correction history flag of the opposite evil is inactive (the opposite evil Flag = Off).

In contrast, if the occlusion tolerance is exceeded (= Yes) and there is no request for automatic correction of the arch line of the opposite jaw by user manipulation (= No), the design device 1 activates the correction history flag of the opposite jaw (opposite jaw Flag = On) state (S1070), and if it is not active (= No), correct the occlusal range of the opposite jaw (S1070) and correct the arch line of the opposite jaw (S1080), thereby completing the arch line correction ( S1090). The automatic correction of the arch line of the opposite evil is possible only when the correction history flag of the opposite evil is inactive (the opposite evil Flag = Off).

In the step of correcting the occlusion range (S1070), the design device 1 may calculate the occlusion range of the opposite jaw using the corrected arch line information of the partial jaw. Through this, it is possible to create an arch line reflecting occlusal conditions (adjacent teeth, occlusal relationship between teeth, etc.) and upper and lower jaw structures. At this time, the arch line of the upper jaw must be larger than the arch line of the lower jaw by reflecting the occlusal relationship. In the step of correcting the arch line of the opposite jaw (S1080), the arch line of the opposite jaw may be corrected and displayed by reflecting the corrected occlusal range.

So far, the present invention has been looked at mainly by its embodiments. Those skilled in the art to which the present invention pertains will be able to understand that the present invention may be implemented in a modified form without departing from the essential characteristics of the present invention. Therefore, the disclosed embodiments should be reflected from a descriptive point of view, not a limiting point of view. The scope of the present invention is shown in the claims rather than the foregoing description, and all differences within the equivalent scope should be construed as being included in the present invention.

Claims (12)

In the method of correcting the arch line that is the standard of tooth arrangement using the tooth arrangement design device, the tooth arrangement design device
Marking the arch line of the partial jaw and the opposite jaw on the tooth image;
receiving a user manipulation signal for at least one of a size, shape, and position of a partial arch line to correct a partial arch line; and
correcting a partial arch line according to a user operation and automatically correcting and displaying an opposite arch line together with the partial arch line correction; Including,
displaying the upper and lower occlusal regions, respectively; and
Marking each of the occlusion points that determine the occlusion areas of the upper and lower jaws;
Arch line correction method characterized in that it further comprises at least one of. The method of claim 1, wherein the step of marking the arch line of the partial and opposite jaws
By displaying the maxillary arch line and the mandibular arch line together in the maxillary dental image, and displaying the maxillary arch line together with the mandibular arch line in the mandibular dental image, the arch line of both jaws can be displayed on a single dental image. An arch line correction method characterized in that it is displayed at the same time. The method of claim 1, wherein the step of automatically correcting and displaying the arch line of the opposite jaw
An arch line correction method characterized in that the arch line of the opposite jaw is corrected together by reflecting the occlusal information of the upper and lower teeth. The method of claim 1, wherein the step of automatically correcting and displaying the arch line of the opposite jaw
modifying the arch line information of the partial music according to the arch line correction of the partial music;
Correcting the occlusal range of the opposite jaw according to the correction of arch line information of the partial jaw;
recalculating arch line information of the opposite jaw by reflecting the corrected occlusion range of the opposite jaw; and
correcting the opposite malar arch line by reflecting the recalculated opposite malar arch line information and displaying the corrected opposite malar arch line together with the partial arc arch line;
Arch line correction method comprising a. delete The method of claim 1, wherein the step of displaying the occlusal regions of the upper and lower jaws respectively
An arch line correction method characterized by displaying an occlusal area including the central fossa area and lingual cusp area of the upper jaw and the buccal cusp area and central fossa area of the lower jaw. The method of claim 1, wherein the step of marking each intersection
Displays the occlusion points including the upper central fossa and lingual cusp and the lower jaw buccal cusp and central fossa, which determine the occlusion area for each individual tooth,
The normal occlusion relationship is an arch line correction method, characterized in that the central fossa of the upper jaw coincides with the buccal cusp of the lower jaw or is located within a predetermined range, and the lingual cusp of the upper jaw coincides with the central fossa of the lower jaw or is located within a predetermined range. The method of claim 1, wherein the arch line correction method is
Checking the revision history of the arch line of the opposite evil and preventing re-correction of the arch line of the opposite evil if it is confirmed that there is a previous revision history;
Arch line correction method characterized in that it further comprises. The method of claim 8, wherein the arch line correction method is
ignoring the correction history of the opposite evil and automatically correcting the opposite evil arch line when a request for automatic correction of the opposite evil arch line is made by user manipulation;
Arch line correction method characterized in that it further comprises. The method of claim 1, wherein the step of automatically correcting and displaying the arch line of the opposite jaw
activating a revision history flag of the bias when correcting the arch line of the bias by user manipulation;
Checking whether the upper and lower teeth occlusion tolerances are exceeded when correcting the arch line of the partial jaw; and
Deactivating the correction history flag of the opposite jaw, correcting the occlusion range of the opposite jaw, and correcting the arch line of the opposite jaw when receiving a request for automatic correction of the arch line of the opposite jaw by user manipulation when the occlusion tolerance is exceeded;
Arch line correction method comprising a. 11. The method of claim 10, wherein the step of automatically correcting and displaying the arch line of the opposite jaw
When the occlusion tolerance is exceeded, if there is no request for automatic correction of the arch line of the opposite jaw by user manipulation, check whether the revision history flag of the opposite jaw is active, and when inactive, correct the occlusion range of the opposite jaw and correct the arch line of the opposite jaw ;
Arch line correction method characterized in that it further comprises. a data acquisition unit for obtaining an image of a tooth of a patient;
an input unit for receiving a user manipulation signal;
an output unit for outputting a tooth image; and
The arch line of the partial jaw and opposite jaw is displayed on the tooth image obtained through the data acquisition unit through the output unit, and a user manipulation signal for at least one of the size, shape, and position of the partial arch line is input to correct the arch line of the partial jaw through the input unit. a control unit for correcting the arch line of the opposite jaw along with the correction of the arch line of the opposite jaw and displaying the corrected arch line through the output unit; Including,
the control unit
A tooth arrangement design device characterized in that each of the occlusal areas of the upper and lower jaws is displayed through the output unit, or the occlusal points determining the occlusal areas of the upper and lower jaws are displayed through the output unit, respectively.