JPH04338465A - Shape/color tone adjusting apparatus for prosthesis tooth - Google Patents

Abstract

PURPOSE:To achieve determination and confirmation of a dentition of lost teeth by displaying an expected shape and an expected color tone by a TV or printing before the making of a prosthetic tooth in reference to the shape and color tone of a tooth corresponding to the lost teeth or a sample based on an image taken with a still video camera or a CCD camera. CONSTITUTION:In the prosthesis of a lost tooth in an upper jaw front dentition, an image of the dentition 1 obtained using a still video camera or a CCD camera 3 is inputted into an image processor 4 to be stored. At this point, the image processor 4 performs a digital analysis of color tones of teeth except for the lost tooth 2 in the image simultaneously and the results are stored. A digital analysis of the color tones is performed for the materials of an artificial ceramic material which is used for the making of a prosthetic tooth and the results are collated with a color tone table 8 stored to compute and store a mixing ratio of the artificial ceramic material for the prosthetic tooth for obtaining the color tone of a retaining tooth. Based on the mixing ratio, an expected reconstruction shape and the state of the color tone are composed together with the shape stored and displayed with a TV 9 or a printer 10.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention is applicable to prosthetic tooth treatment for teeth that are completely missing or partially missing, by changing the shape and/or color of the missing tooth to the shape and/or color of a healthy natural tooth that forms the remaining part.
The present invention relates to an apparatus suitable for quickly and accurately determining and preparing a prosthetic tooth sample by referring to its shape and color when no healthy natural teeth remain.

0002

[Prior Art] In dentistry, patients' dentition, cavities, tartar,
A still video camera or CCD captures affected areas of the oral cavity such as alveolar pyorrhea.
Attempts have been made to take pictures with a camera, store the images as electronic signals on a floppy disk, and then play them back on a TV, print them out, or transmit the images for use.

0003

[Problems to be Solved by the Invention] The present invention provides prosthetic tooth treatment for a dentition that is symmetrical on the left or right, or on the upper or lower side, with a missing tooth on either the left or right, or on the upper or lower side, such as a missing front tooth. In such cases, when considering methods of regenerating missing teeth and regenerating methods that include new presentations according to the patient's wishes, we recommend using a device that can check the expected shape and color tone before regeneration while referring to the surrounding conditions and related conditions before regeneration. The challenge is to provide this information.

0004

[Means for Solving the Problems] In order to achieve the above-mentioned problems, the present invention provides a still symmetrical tooth row on the left or right, or on the top or bottom, which has a missing tooth on either the left or right, or on the top or bottom. An image taken with a video camera or CCD camera is input and stored, and the image obtained by removing and erasing the tooth symmetrical to the missing tooth from the image on the non-defective tooth side of the image is flipped horizontally or vertically. to prepare and memorize the shape of the missing tooth to be regenerated,
A prosthetic tooth characterized in that the shape image is superimposed on the image of the defective tooth side to create a planned image of the regenerated dentition on the defect side, the shape of the shape image is adjusted as necessary, and the image is stored. A shape adjustment device is used as the first means,

[0005] An image obtained by photographing a dentition with a missing tooth on the left or right, upper or lower side, and which is symmetrical on the left or right side or on the upper or lower side with a still video camera or a CCD camera is input and stored. , Digitally analyze and store the color tone of the image on the non-defective tooth side of the image, and digitally analyze the color tone digital signal and the individual color tone of the color tone adjusting agent of the substance for creating the defective tooth stored in advance. A second means is a color tone adjustment device for prosthetic teeth, which calculates and stores the mixing ratio of the color tone adjusting agent of the substance for creating the defective tooth based on the color tone digital signal table,

[0006] An image obtained by photographing a dentition with a symmetrical left or right or upper or lower tooth with a missing tooth on either the left or right, upper or lower side using a still video camera or CCD camera is input and stored. ,
The image obtained by removing and erasing the tooth symmetrical to the missing tooth from the image on the non-missing tooth side of the image is flipped horizontally or vertically to prepare and memorize the shape to be regenerated of the missing tooth, and the shape image is used as the missing tooth. creating a projected image for regeneration of the missing tooth by superimposing it on the side image, adjusting the shape of the shape image as necessary and storing the image, and further digitally analyzing the color tone of the image on the non-defective tooth side; Based on the color tone digital signal and a color tone digital signal table obtained by digitally analyzing the individual color tones of the color tone adjusting agent of the substance that creates the missing tooth, the mixing ratio of the color tone adjusting agent of the substance that creates the missing tooth. A third means is a prosthetic tooth shape/color adjustment device that is characterized by calculating the

[0007] Images obtained by photographing the left, right, upper or lower dentition with a missing tooth on either the left, right, upper or lower side with a still video camera or CCD camera are input and stored, and the prosthesis is performed. A planned shape for regeneration of the missing tooth is prepared and stored from the shape image of the tooth sample, and the shape image is superimposed on the image of the defective tooth side to create a planned image of the regenerated dentition on the defective side, and the above shape image is added as necessary. A fourth device for adjusting the shape of a prosthetic tooth is characterized by adjusting the shape of the tooth and storing the image.
as a means of

[0008] Images obtained by photographing the left, right, upper or lower dentition with a missing tooth on either the left, right, upper or lower side with a still video camera or CCD camera are input and stored in advance. Based on the color tone digital signal table obtained by digitally analyzing the color tone of the sample of the prosthetic tooth and the color tone digital signal table obtained by digitally analyzing the individual color tone of the color tone adjustment agent of the material that creates the defective tooth, A fifth means is a color tone adjustment device for prosthetic teeth, which is characterized by calculating and storing a mixing ratio of a color tone adjusting agent in a material used to create teeth;

[0009] Images obtained by photographing the left or right, upper or lower dentition with a missing tooth on either the left or right, upper or lower side with a still video camera or CCD camera are input and stored, and the prosthesis is performed. A planned shape for regeneration of the defective tooth is prepared and stored from the shape image of the tooth sample, and the shape image is superimposed on the image of the defective tooth side to create a planned image of the regenerated dentition on the defective side. The shape of the prosthetic tooth is adjusted, the image is stored, and the color tone of the sample of the prosthetic tooth is digitally analyzed to create a color tone digital signal table, and the individual color tone of the color tone adjustment agent of the substance used to create the defective tooth is digitally analyzed. A sixth means is a shape/color adjustment device for prosthetic teeth, which is characterized by calculating the mixing ratio of the color adjustment agent of the substance used to create the defective tooth based on the color tone digital signal table obtained. It is something.

0010

[Operation] Since the device of the present invention is constructed with the above-mentioned means, the dentist can show the patient the shape and color expected after regeneration on TV or in print, so that the dentist can show the patient the shape and color expected after the regeneration. By listening to the patient's wishes, incorporating them into the manufacturing conditions, and delivering the required shape and color of the prosthetic tooth to the technician or laboratory as an electronic signal on a floppy disk or by transmitting it, the desired shape can be quickly and accurately created. Since colored prosthetic teeth can be manufactured, the patient's anxiety is not only alleviated, but also a good relationship of trust between the doctor and the patient is fostered.

[0011]

[Example 1] Missing tooth 2 in the maxillary anterior dentition 1 shown in Fig. 1
During the prosthesis, images of the dentition 1 obtained using a still video camera and a CCD camera 3 were input to the image processing device 4 and stored. Next, the image processing device 4 removes and erases the tooth 5 that is symmetrical to the missing tooth 2 from the copy of the non-missing tooth side of the image, and the left and right sides of the obtained image are reversed to prepare a shape 6 in which the missing tooth is to be regenerated. This image was stored, and a copy of the shape image was superimposed on the image of the defective tooth side to create a projected image of the reconstructed dentition on the defect side. Although it is possible to adjust the shape of this image as necessary, since the shape prepared for the prosthetic teeth described above did not require adjustment at this time, the final shape was not adjusted by the image processing device 4. It was stored as defect side regenerated dentition shape image 7. The image is shown in Figure 2.

At this time, the image processing device 4 simultaneously digitally analyzes and stores the color tone of each tooth in the above image except for the missing tooth 2, and preliminarily analyzes the color tone of each tooth except for the missing tooth 2, and stores the color tone of each tooth in the above-mentioned image.
Artificial porcelain materials such as jackets, crowns, and metal bonds (
Digitally analyze the color tone of each material (not shown) and compare it with the stored color tone table 8 to obtain the color tone of the remaining tooth.The mixing ratio of the artificial porcelain material for the prosthetic tooth is calculated and stored. Based on the above-mentioned memory shape, the predicted reproduced shape and color tone state were displayed on the television 9 and the printer 10. After showing this to the patient and listening to their wishes, we fabricate the prosthetic teeth, and at a later date,
When the prosthetic tooth is completed, the above expected regeneration state and TV 9
The prosthetic tooth treatment was completed by comparing the images above and confirming that the results were as expected.

In this example, the patient requested a prosthetic tooth of the same color as the remaining tooth, so a prosthetic tooth of the same color as the remaining tooth was manufactured and used. It is also possible to manufacture and use prosthetic teeth after confirming the planned color tone of the prosthetic teeth according to the desired color tone.

[0014]

[Embodiment 2] This example is an example in which the remaining teeth to be used as a reference are not healthy natural teeth in the prosthesis of the missing tooth 2 in the maxillary anterior dentition 1 shown in FIG. Still video camera and CCD
As in the first embodiment, the image of the dentition 1 obtained using the camera 3 is input to the image processing device 4 and stored therein. Next, a shape 6 to be regenerated of the missing tooth is prepared from the shape/color table 11 of the prosthetic tooth sample stored in advance in the image processing device 4, and this image is stored, and a copy of the shape image is made into the image of the missing tooth side. The images were superimposed to create a projected image of the regenerated dentition on the defect side. Since the shape of this image needed to be adjusted for use as a prosthetic tooth for a missing tooth, the shape was adjusted using the image processing device 4. The image after adjustment was stored as the final defect side reconstructed dentition shape image 7. The image is shown in Figure 4.

[0015] At this time, the image processing device 4 digitally analyzes and stores the color tone of the tooth prepared in the shape 6 to be regenerated of the missing tooth from the shape and color tone table 11 of the prosthetic tooth sample, and uses it in advance for manufacturing the prosthetic tooth. For prosthetic teeth, the color tone of each artificial porcelain material (not shown) such as alumina, porcelain, jacket, crown, and metal bond is digitally analyzed and compared with the stored color table 8 to determine the color tone of the prosthetic tooth. The mixing ratio of the artificial porcelain was calculated and stored, and based on this, the image was constructed together with the above-mentioned memory shape, and the expected reproduced shape and color tone state were displayed on the television 9 and printer 10. After showing this to the patient and listening to their wishes, the prosthetic tooth was manufactured, and later, when the prosthesis was completed, the predicted regeneration state was compared and displayed on the TV 9, the finished product was confirmed, and the prosthetic tooth treatment was completed. .

In this example, the patient requested a prosthetic tooth of the same color as the sample, so a prosthetic tooth of the same color as the sample was manufactured and used. However, if the patient desires, it is also possible to fabricate and use the prosthetic tooth after confirming the planned prosthetic tooth color tone according to the patient's desired color tone, such as gold or other color tone.

In the second embodiment, the sizes of the prosthetic tooth sample and the patient's dentition are compared by the nasal alar comparison method, and the shape image of the prosthetic tooth sample is processed by the image processing device 4 according to this ratio.
I used it after adjusting the scale with .

[0018]

[Effects of the Invention] Since the present invention uses the above-mentioned means and utilizes the above-mentioned effects, the patient can fully confirm the formation state and color of the dentition desired for the prosthetic teeth before manufacturing the prosthetic teeth.
Patients' dissatisfaction with the actual prosthetic teeth, which was unavoidable in the past, has been completely eliminated, and in prosthetic dental treatment, it has become easier to form good communication between doctors and patients, and a relationship of trust has only been fostered. Since the patient's wishes can be checked in advance and fully incorporated into the prediction stage of the regenerated shape and color of the missing tooth, it is possible to create the shape and color according to the patient's wishes in conjunction with the treatment, and the living environment can be used as an opportunity for treatment. It will have a great effect on this field, such as making it possible to create, enrich, and expand the field.

[0019]

[Brief explanation of the drawing]

FIG. 1 is a diagram illustrating an embodiment of the device of the present invention, which is intended for an example of the maxillary anterior dentition having missing teeth.

FIG. 2 is a final defect-side dentition shape image that was stored in the image processing device and displayed on the television in Example 1 by the device of the present invention.

FIG. 3 is a diagram illustrating another embodiment of the device of the present invention, which targets an example of the maxillary anterior dentition having missing teeth.

FIG. 4 is a final defect-side dentition shape image stored in the image processing device and displayed on the television by the apparatus of the present invention in Example 2;

Claims (6)

[Claims] Claim 1: Input an image obtained by photographing a dentition that is symmetrical on the left or right or on the upper or lower side and has a missing tooth on either the left or right or on the upper or lower side using a still video camera or a CCD camera. storing the image, and removing and erasing teeth symmetrical to the missing tooth from the image on the non-missing tooth side of the image, inverting the image horizontally or vertically to prepare a shape to be regenerated of the missing tooth, and storing it;
A prosthetic tooth characterized in that the shape image is superimposed on the image of the defective tooth side to create a planned image of the regenerated dentition on the defect side, the shape of the shape image is adjusted as necessary, and the image is stored. Shape/color adjustment device. Claim 2: Input an image obtained by photographing a dentition that is symmetrical on the left or right or on the upper or lower side and has a missing tooth on either the left or right or on the upper or lower side using a still video camera or a CCD camera. The color tone of the image of the remaining tooth on the side of the missing tooth in the image is digitally analyzed and stored, and the color tone digital signal and the individual color tone of the color tone adjusting agent of the substance that creates the missing tooth that is stored in advance are digitally analyzed. A shape/color adjustment device for prosthetic teeth, which calculates and stores a mixing ratio of a color adjustment agent in a substance for creating the missing tooth based on a color tone digital signal table obtained by analysis. Claim 3: Input an image obtained by photographing a dentition that is symmetrical on the left or right or on the upper or lower side and has a missing tooth on either the left or right or on the upper or lower side using a still video camera or a CCD camera. storing the image, and removing and erasing teeth symmetrical to the missing tooth from the image on the non-missing tooth side of the image, inverting the image horizontally or vertically to prepare a shape to be regenerated of the missing tooth, and storing it;
The shape image is superimposed on the image of the missing tooth side to create a scheduled image for regenerating the dentition on the missing side, the shape of the shape image is adjusted as necessary and the image is stored, and the remaining tooth row image on the missing tooth side is adjusted as necessary. Digitally analyze the color tone of the image of the tooth, and based on the color tone digital signal and a color tone digital signal table obtained by digitally analyzing the individual color tone of the color tone adjustment agent of the substance that creates the defective tooth, Prosthetic tooth shape/shape, characterized by calculating the mixing ratio of the color tone adjusting agent of the material to be created.
Color adjustment device. Claim 4: Input and store images obtained by photographing the left, right, upper or lower dentition with a missing tooth on either the left or right, upper or lower side using a still video camera or CCD camera. , prepare and store a planned shape for regeneration of the defective tooth from the shape image of the sample of the prosthetic tooth, superimpose the shape image on the image of the defective tooth side to create a planned image of the regenerated dentition on the defect side, and perform the above-described process as necessary. A prosthetic tooth shape/color tone adjustment device that adjusts the shape of a shape image and stores the image. 5. Input and store images obtained by photographing the left or right, upper or lower dentition with a missing tooth on either the left, right, upper or lower side using a still video camera or CCD camera. , based on the color tone digital signal table obtained by digitally analyzing the color tone of the prosthetic tooth sample in advance and the color tone digital signal table obtained by digitally analyzing the individual color tone of the color tone adjusting agent of the substance that creates the missing tooth, A shape/color adjustment device for prosthetic teeth, characterized by calculating and storing a mixing ratio of a color adjustment agent in a substance used to create the missing tooth. 6. Input and store images obtained by photographing the left or right, upper or lower dentition with a missing tooth on either the left or right, upper or lower side using a still video camera or CCD camera. , prepare and store a planned shape for regeneration of the defective tooth from the shape image of the sample of the prosthetic tooth, superimpose the shape image on the image of the defective tooth side to create a planned image of the regenerated dentition on the defect side, and perform the above-described process as necessary. The shape of the shape image is adjusted and the image is stored, and the color tone digital signal table obtained by digitally analyzing the color tone of the sample of the prosthetic tooth and the individual color tone of the color tone adjusting agent of the substance used to create the defective tooth are calculated. A shape/color adjustment device for prosthetic teeth, characterized in that the mixing ratio of a color adjustment agent for the substance used to create the defective tooth is calculated based on a color tone digital signal table obtained through digital analysis.