JPH04367658A - Shade guide of tooth and method for adjusting color of dental prosthetic appliance by using this guide - Google Patents

Abstract

PURPOSE:To indirectly correct the difference between the colors of the actual intraoral prosthetic appliance and the colors on the monitor thereof by providing plural reference color display parts. CONSTITUTION:A shade guide 2 is disposed in the part desired to be mounted with the prosthetic appliance and is photographed by a still video camera under the daylight colors. The floppy thereof is put into a video reproducing device and is reproduced on a television monitor screen. The colors (R, G, B colors) of the reference color display plate 3 reproduced on the screen are adjusted to the colors approximate to the colors of the actual reference color display plate 3 by adjusting the knobs R, G, B of the monitor. The similar effect is obtd. even if a 'Polaroid(R)' photograph or a video camera by CCD image pickup elements is used. The mismatch between the colors of the prosthetic appliance requested by a dentist and the colors of the prosthetic appliance formed by a dental technician is averted in this way.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shade guide used by a dentist to select an aesthetically superior color tone when using a dental prosthesis on a patient. The present invention also relates to a method for adjusting the color of a dental prosthesis using the shade guide.

0002

[Prior Art] When fitting a highly aesthetic prosthesis such as porcelain to a patient, the dentist writes down the color of the patient's teeth on an instruction sheet, and then the dentist creates a prosthesis with the same tooth color. instruct the officer.

[0003]Furthermore, in order to request the creation of more realistic prostheses, recently, imaging techniques using photographs (Polaroid photographs), slides, or imaging devices such as CCDs are being used.

However, in conventional photographs, the colors are affected by conditions such as the camera lighting used, and it is difficult to reproduce the true color of teeth in the oral cavity. Furthermore, systems using image pickup devices such as CCDs have a problem in that there is large variation in color between the intraoral prosthesis reproduced on a monitor and the actual intraoral prosthesis.

[0005]

Problem to be Solved by the Invention The present invention has been made in view of the above circumstances, and its object is to indirectly correct the difference between the color of the actual oral prosthesis and the color on the monitor. The goal is to provide the means to do so. More specifically,
An object of the present invention is to provide a tooth shade guide that can be used for the above purpose and a method for adjusting the color of a dental prosthesis using the same.

[0006]

[Means for Solving the Problems] A tooth shade guide according to the present invention is characterized in that a plurality of reference color display sections are provided.

[0007] Furthermore, in the method for adjusting the color of a dental prosthesis according to the present invention, an actual tooth and the tooth shade guide according to claim 1 are simultaneously photographed, and the color of the actual tooth is compared with the color of the tooth on the image. The color deviation is adjusted based on the color deviation between the actual color of the reference color and the color on the image.

[0008] As a shade guide used to reproduce the same color as a patient's teeth, for example, a shade guide manufactured by Vita Corporation is known. The shade guide of the present invention is
These known shade guides are provided with a display section that displays reference colors (R, G, B colors, etc.).

[0009]

[Operation] In order to reproduce the same color as the patient's teeth, identify the light source, place the shade guide of the present invention near the tooth to which it will be attached, and photograph the patient's teeth and the shade guide together. . By comparing the actual color of the reference color provided in the shade guide of the present invention and the color of these reference colors projected on the video or image, it is possible to know the difference between the actual color and the color of the video or image. Can be done. If this color shift is known, based on this, it is possible to more accurately understand the color of the patient's actual teeth from the color of the teeth shown in the image or video.

For example, when an image is captured using an image sensor such as a CCD, the color adjustment mechanism of the monitor system is adjusted so that the reference color on the image reproduced on the television monitor is close to the actual reference color. You can use it to adjust. The color of the patient's teeth in the image thus adjusted is close to the color of the patient's actual teeth.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an embodiment of a tooth shade guide according to the present invention. In the figure, 1 is a holder. A shade guide 2 is fixed to the tip of the holder. This shade guide 2 consists of a tooth-shaped head and a neck that connects the head to the holder 1. In addition, the neck of the shade guide 2 has R, G, B
A reference color display plate 3 made of a thin aluminum plate on which colors are arranged is attached. To install this standard color display board,
In addition to providing an uneven surface on the back surface, a polymer tape having an uneven surface is wrapped around the neck of the shade guide, and patch fixing is performed by fitting the uneven portions of both. Note that the shade guide 2 is selected in advance and used, the head of which has a color matching the color of the patient's teeth. Next, an example will be described in which the color of a dental prosthesis is adjusted using the shade guide of the above example.

[0012] First, the above-mentioned shade guide was placed in the area where the prosthesis was to be attached, and the area was photographed using a still video camera under daylight. The floppy was put into a video reproduction device and reproduced on a television monitor screen. By adjusting the R, G, and B knobs on the monitor, the colors of the reference color display board 3 (R, G, and B colors) reproduced on the screen can be changed from the actual colors of the reference color display board 3 ( The color was adjusted to be close to R, G, B colors). Next, using the results as a reference, they created a dental prosthesis using porcelain, which resulted in a prosthesis that was even more realistic and closer to the color of the patient's teeth than ever before.

[0013] In place of the still video camera, a photograph (Polaroid photograph) or a video camera using a CCD image sensor was used and the same procedure as above was carried out, and the same effect as above was obtained in this case as well. However, when using photographs, a method was used in which the actual tooth color was estimated by referring to the deviation between each color of the reference color display area shown in the photograph and the actual reference color.

[0014]Also, in the above embodiment, the standard color display plate 3 is used, which has R, G, and B colors that serve as standards for hue and saturation. A standard color display board with a gray scale may also be used.

[0015]

[Effects of the Invention] As detailed above, according to the present invention,
The dentist's request and the color of the prosthesis, which had been a problem in the past,
Mismatches with the color of the prosthesis created by the technician can be avoided. Therefore, remarkable effects can be obtained, such as the ability to create a dental prosthesis that is even more aesthetically pleasing than before.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing an embodiment of a tooth shade guide according to the present invention.

[Explanation of symbols]

Claims (2)

[Claims] 1. A tooth shade guide comprising a plurality of reference color display sections. [Claim 2] The actual tooth and the tooth shade guide according to claim 1 are simultaneously photographed, and the deviation between the actual tooth color and the tooth color on the image is determined based on the actual color of the reference color. A method for adjusting the color of a dental prosthesis, the method comprising adjusting the color based on the color shift between the color and the color on the image.