JP2001299776A - Color matching filter for crown restoring material and method for selecting color of crown restoring material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To select the color of a crown restoring material matching with the color of an objective natural tooth at the time of using the crow restoring material instead of the natural tooth cut in the oval cavity of a patient. SOLUTION: At the time of selecting the color of the crown restoring material matching with the color of the objective natural tooth 4 by comparing the color samples 1, 1, or the like, of a color guide 2 in which a plurality of color samples 1 for crown restoring materials are arranged with the color of the natural tooth 4 in the oval cavity of the patient, the color of the crown restoring material of the guide 2 matching with that of the objective natural tooth 4 is selected by only extracting the brightness or color of each crown restoring material matching with that of the natural tooth 4 by using a color matching filter 5 to which only the brightness or color of each color sample 1 matching with that of the tooth 4 is added. Consequently, the color of the crown restoring material matching with that of the objective natural tooth 4 can be selected.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color matching filter for a dental restoration material used for selecting a color of the dental restoration material that matches the color of a natural tooth of interest in the oral cavity, and more particularly, to a color matching filter of the dental restoration material. , Color matching of a crown restoration material colored with a color that extracts only the brightness or color between each color sample of a color guide in which a plurality of color samples of a crown restoration material are arranged and a natural tooth in a subject's oral cavity The present invention relates to a filter and a method for selecting a color of a crown restoration material using the same.

[0002]

2. Description of the Related Art Conventionally, when a natural tooth in an oral cavity is lost, a crown restorative material such as an artificial tooth, a resin, or a paste has been used instead of the lost natural tooth.
It has been desired that the color of the crown restoration material be selected so as to match the color of the target natural tooth in the oral cavity. In order to select the color of such a restoration material, for example, a color guide 2 in which a plurality of color samples 1 of the restoration material are arranged as shown in FIG. 4 has been used. This color guide 2 is for selecting the color sample 1 closest to the color of the target natural tooth from the colors of the arranged color samples 1, 1,. Are colored to cover the color space of the tooth so as to include all the colors of the natural tooth.

However, each color sample 1 of the above color guide 2
When selecting a color sample 1 that most closely resembles the color of the target natural tooth in the oral cavity from among 1, 1, ..., it is difficult to accurately perceive the color of the tooth. It was difficult to select a matching crown restoration color.
Therefore, as a method for accurately perceiving and selecting the tooth color, a comparison between each of the color samples 1, 1,... And the natural tooth is performed for each of the three attributes of color, that is, lightness, saturation, and hue. The color sample 1 closest to the color of the natural tooth is selected from the color samples 1, 1,.... The color of the crown restorative material that most closely resembled the color of the target natural tooth was selected based on the selected color sample 1.

[0004] The above-mentioned method of selecting the color of the crown restorative material is performed by first determining the lightness of the crown restorative material, and then determining the saturation and hue (hereinafter referred to as "color"). It was done. That is, as shown in FIG. 5, in order to determine the lightness of the crown restorative material used in place of the lost natural tooth 3 as the first step, each color sample 1, 1,. Are compared side by side, and a plurality of color samples 1 having the lightness level closest to the lightness level of the natural tooth 4 are selected from the color samples 1, 1,.... In order to determine the color of the dental restoration material as the next step, the color sample 1 having the color closest to the color of the natural tooth 4 is selected from the plurality of color sample groups selected in the first step. Was. According to such a procedure, the color sample 1 having the closest lightness and color to the target natural tooth 4 is selected, the color of the crown restoration material is selected based on the color sample 1, and the tooth restoration is performed based on this color. Crown restoration material was being made. In addition, as a color guide for efficiently selecting the color sample of the crown restoration material by the above procedure, the color of the color sample is statistically added in accordance with the distribution of the color of the natural tooth, and the color sample is added. Some color guides were systematically arranged.

[0005]

However, in the conventional method for selecting the color of the crown restorative material, in the first step, the target natural tooth 4 is selected from the color samples 1, 1,.
.. And the natural teeth 4 have colors, the eyes are affected by the colors when judging the lightness. Color sample 1 could not be selected by comparing only. Therefore, even if it is intended to select a color sample group having a lightness similar to the lightness of the natural teeth 4, it is actually possible to select a color sample having a lightness higher or lower than the lightness of the target natural tooth 4. there were.

[0006] In the next step, a color sample 1 whose color is similar to the target natural tooth 4 must be selected from the plurality of color sample groups selected in the first step. Since a plurality of color swatch groups may be selected to have a lightness different from that of the actual natural tooth, a color sample 1 having a color most similar to the color of the natural tooth 4 is selected from among them. However, the color of the color sample 1 may be different from the color of the natural tooth 4, and as a result, the color of the crown restorative material may not be accurately selected.
Since the color samples 1, 1,... And the natural teeth 4 have high lightness and high light reflectance, the appearance of colors may be different depending on environmental light such as lighting. It was not possible to select a color sample by comparing only the colors with

As described above, the appearance of colors is affected by lightness, saturation and hue, and the appearance of lightness and colors may be different depending on ambient light. ,... And the natural tooth 4 are compared for each of the three attributes of the color, and even if a color sample is selected, a color sample that matches the color of the target natural tooth 4 is not always selected. . In addition, since the human eye cannot compare only the brightness or the color, even if the color samples 1, 1,... However, it was difficult to select an objective color sample.

Accordingly, the present invention addresses such a problem and can select a color sample of a harmonious color as compared with the color of the target natural tooth, thereby objectively determining the color of the crown restoration material. An object of the present invention is to provide a color matching filter for a crown restoring material that can be selectively selected and a color selecting method for a crown restoring material using the same.

[0009]

In order to achieve the above object, a color matching filter for a dental restoration material according to the present invention comprises:
By comparing the color samples of the color guide, in which a plurality of color samples of the crown restorative material are arranged, with the natural teeth in the oral cavity of the subject, the restoration of the crown restorative material that matches the color of the target natural tooth The color is selected, and the color is extracted to extract only the brightness or color between each color sample of the color guide and the natural tooth in the oral cavity.

Here, the color for extracting only the lightness between each color sample of the color guide and the natural tooth in the oral cavity is a color that is complementary to the tooth color.

The color for extracting only the color of each color sample of the color guide and the natural teeth in the oral cavity is a color for reducing the lightness of the teeth.

[0012] The shape of the color matching filter of the crown restoring material includes a wide portion and another narrow portion.

[0013] In order to achieve the above object, a method for selecting a color of a crown restoration material according to the present invention comprises the steps of: providing a color guide in which a plurality of color samples of the crown restoration material are arranged; When comparing the color with the natural teeth in the above, the color matching of the crown restoration material which is colored to extract only the lightness or color between each color sample of the color guide described in the above means and the natural teeth in the oral cavity Using a filter, extract only the brightness or color of each color sample of the color guide and the natural teeth in the oral cavity, select a color sample of the crown restoration material that is similar to the brightness or color of the target natural tooth, Based on the selected color sample, the color of the crown restoration material that matches the color of the target natural tooth is selected.

The extraction of only the brightness between each color sample of the above color guide and the natural tooth in the oral cavity is performed by using a color matching filter of a crown restoring material colored with a complementary color to the tooth color. Do it.

Extraction of only the color of each color sample of the color guide and the natural teeth in the oral cavity is performed by using a color matching filter of a crown restoring material colored to reduce the lightness of the teeth.

Further, another method for selecting a color of a crown restorative material according to the present invention is a method of selecting a color guide of a color guide in which a plurality of color samples of a crown restorative material are arranged and a natural tooth in an oral cavity of a subject. When comparing colors, first, using a color matching filter of a crown restorative material colored with a color complementary to the tooth color, extracting only the brightness of each of the above color samples and natural teeth, Select a color sample of the crown restoration material that is similar to the lightness of the natural tooth to be used, and then use a color matching filter of the crown restoration material colored to reduce the lightness of the tooth. The color sample of the crown restoration material similar to the color of the target natural tooth is selected from the above selected crown restoration materials by extracting only the color of Select the color of the crown restorative material that matches the color of the natural tooth.

[0017]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a plan view showing a color matching filter of a crown restoration material according to the present invention. The color matching filter 5 of the crown restorative material includes, for example, the color of each color sample 1, 1,... Of the color guide 2 in which a plurality of color samples 1 of the crown restorative material are arranged as shown in FIG. Is used to select the color of the crown restorative material that matches the color of the target natural tooth by comparing with the color of the natural tooth of the subject. The color is used to extract only the brightness or color with the natural teeth in the oral cavity of the person. The color matching filter 5 of the crown restorative material includes a lightness extraction filter 5a (see FIG. 1A) colored to extract only the lightness of each of the color samples 1, 1,. There are two types of filters: a color extraction filter 5b (see FIG. 1B) to which only a color is extracted.

The color of the natural teeth in the oral cavity is transparent and gradually changes in color, with a yellowish or reddish color.
Each of the color samples 1, 1,... Of the color guide is given a color that includes the color of the teeth. Here, each of the above color samples 1, 1,
And the colors of the natural teeth 4 are located in a limited fixed area in the color space. On the other hand, the lightness extraction filter 5a is given a color that is complementary to the tooth color. Therefore, looking at each of the color samples 1, 1,... And the natural teeth 4 through the lightness extraction filter 5a, the colors of the teeth located in a limited fixed area in the color space are:
Since it is absorbed by the brightness extraction filter 5a, it looks as if the color has been completely removed. Thus, it is possible to extract and compare only the brightness of each of the color samples 1, 1,. The color applied to the brightness extraction filter 5a has such a density that the residual image color does not affect the color.

Since the color samples 1, 1,... And the natural teeth 4 have a high lightness and a high light reflectance, the appearance of colors may differ depending on environmental light such as illumination. Therefore,
The color extraction filter 5b is colored to reduce the brightness of the teeth. Therefore, when the color samples 1, 1, ... and the natural teeth 4 are viewed through the color extraction filter 5b, the light reflected by the color samples 1, 1, ... and the natural teeth 4 is absorbed by the color extraction filter 5b. Therefore, the reflected light is suppressed and the brightness appears to be reduced. Thus, it is possible to extract and compare only the colors of the color samples 1, 1,... And the natural teeth 4. The color applied to the color extraction filter 5b has such a density as not to be affected by the afterimage color.

The shape of the color matching filter 5 of the crown restorative material includes, for example, as shown in FIG. 1, a wide portion and another narrow portion. Due to the wide portion, as shown in FIG. 2, each color sample 1, 1,... Of the color guide 2 and the target natural tooth 4 are arranged side by side through the color matching filter 5 of the crown restoration material. Can be compared. Further, as shown in FIG. 3, the narrow portion is smoothly inserted into the oral cavity of the subject, and the filler 6 is inserted through the color matching filter 5 of the crown restoration material. And the target natural tooth 4 can be compared side by side.

Next, a method for selecting a color of the crown restoring material using the color matching filter 5 of the crown restoring material will be described with reference to FIG. Here, a color guide 2 of the type shown in FIG. 4 is used in order to select a color of the crown restorative material that matches in comparison with the color of the target natural tooth 4.
The method for selecting the color of the crown restorative material is as follows. Each color sample 1, 1, 1, of the color guide 2 in which a plurality of color samples 1 of the crown restorative material are arranged.
When comparing the color of ... with the natural teeth 4 in the oral cavity of the subject, the color matching filter 5 of the above-mentioned crown restorative material is used,
Only the lightness or color of each color sample 1, 1,... Of the color guide 2 and the natural tooth 4 in the oral cavity is extracted, and a color sample of a crown restoration material similar to the lightness or color of the target natural tooth is selected. Then, based on the selected color sample, a color of the crown restoration material that is harmonized with the color of the target natural tooth 4 is selected. At this time, each color sample 1,
.. Can be easily selected by arranging them in the order of lightness in advance.

First, in order to determine the lightness of the crown restorative material in the first step, and to determine the lightness of the crown restorative material to be used in place of the lost natural tooth 3, the above color samples 1 and 2 are used.
Are arranged so that they can be compared with the target natural teeth 4 in the oral cavity, and the color samples 1, 1,... And the natural teeth 4 are observed through the brightness extraction filter 5a. As mentioned above,
Since the lightness extraction filter 5a is given a color that is complementary to the color of the tooth, the color of the tooth is absorbed to completely remove the color of each of the color samples 1, 1, ... and the natural tooth 4. Therefore, it is possible to extract and compare only the brightness of each of the color samples 1, 1,. Thereby, the natural tooth 4 is selected from the color samples 1, 1,.
And a color sample group having the closest lightness level can be selected without being affected by color.

At this time, the brightness extraction filter 5a
Approximately 5 to 10 cm apart from the arranged color samples 1, 1,... And the natural teeth 4, and the color samples 1, 1,.
And the lightness extraction filter 5a, and the lightness extraction filter 5a is set to be perpendicular to the operator's line of sight so that reflected light of ambient light does not enter the eyes. Is desirable.

Next, as a step for determining the color of the crown restorative material, a plurality of color sample groups selected in the first step are arranged so as to be able to be compared with the target natural tooth 4, and the color The color sample group and the natural teeth 4 are observed through the extraction filter 5b. As described above, the color extraction filter 5b is given a color that reduces the brightness of the teeth, so that the light reflected by the teeth can be absorbed to reduce the brightness of each of the color samples and the natural teeth 4. Therefore, only the colors of the color sample group and the natural tooth 4 can be extracted and compared. Thereby, it is possible to accurately perceive the color of the natural tooth 4, that is, whether the target natural tooth 4 has a reddish tint or a yellow tint. Thus, the color sample 1 having the color closest to the color of the natural tooth 4 can be selected.

The selection of the color sample 1 is desirably performed under diffused light, avoiding direct light, under natural light or daylight illumination. By doing so, it is possible not to affect the eyes of the operator, and it is possible to accurately perceive the color and make an accurate judgment. The colors applied to the lightness extraction filter 5a and the color extraction filter 5b have such a density that the afterimage does not affect the eyes of the operator, so that the next step is performed immediately after the first step. be able to.

The color sample 1 selected in this manner is a color whose brightness and color completely match those of the target natural tooth 4 and which match the color of the target natural tooth 4. Then, the color of the crown restoration material is selected and manufactured based on the selected color sample 1. At this time, the dental technician who selects the color of the crown restoration material also uses the color matching filter 5 of the crown restoration material in the same procedure as described above,
It is possible to select a color of the crown restorative material that matches the color of the natural tooth 4 in the oral cavity, and it is possible to confirm the production state of the crown restorative material. Although the method of selecting the color sample 1 of the crown restorative material using the color guide 2 shown in FIG. 2 has been described here, the present invention is not limited to the type of the color guide, and the color of the color sample is changed to the natural tooth. The same applies to the case where a color guide in which color samples are systematically arranged in accordance with the distribution of the colors is used.

Also, as shown in FIG. 3, when the dentist fills the filling material 6 such as a resin into the natural teeth 4 in the inner part of the oral cavity, the harmony with the color of the target natural teeth 4 is similarly obtained. The color of the filled filler 6 may be selected using the color matching filter 5 of the crown restoration material. That is, the narrow part of the color matching filter 5 of the above-mentioned crown restorative material is inserted into the deep part of the oral cavity of the subject, and the inserted filler is inserted through the color matching filter 5 of the inserted crown restorative material. 6 is compared with the target natural tooth 4 for each of the three color attributes.
What is necessary is just to select the color of the filler 6 that matches with the color of the filler 6.

The method for selecting the color of the crown restorative material according to the present invention is not limited to the above-described method, but may be applied to the brightness extraction filter 5a.
Extracting the brightness of each color sample of the color guide and the natural teeth in the oral cavity using only the color guide, and selecting a color sample of the crown restoration material in which only the target natural tooth and the lightness are approximated, or Even if only the color extraction filter 5b is used to extract the colors of each color sample of the above color guide and the natural teeth in the oral cavity, and select the color sample of the crown restoration material whose color is similar to the target natural tooth only, Good.

[0029]

The present invention has been configured as described above.
According to the color matching filter of the crown restorative material according to claim 1, the brightness or the color of each color sample of the color guide in which a plurality of color samples of the crown restorative material are arranged and the natural teeth in the oral cavity of the subject. By adding the color for extracting only the color guide, each color sample of the color guide and the natural tooth in the oral cavity can be extracted and compared for each of the three attributes of color, that is, lightness, saturation, and hue. Therefore, it is possible to select a color sample that is in harmony with the color of the target natural tooth, and to objectively select the color of the crown restoration material. In addition, the narrowly formed portion of the color matching filter of the above-mentioned crown restorative material allows the portion to be easily inserted deep into the oral cavity of the subject, and matches the color of the target natural tooth. The color of the crown restoration material or filling to be applied can be selected.

Further, according to the color selecting method of the crown restorative material according to the fifth aspect, each color sample of the color guide in which a plurality of color samples of the crown restorative material are arranged and the natural tooth in the oral cavity of the subject. When comparing the color with the color sample of the color guide and a color matching filter of a crown restorative material to which a color for extracting only the brightness or color of the natural teeth in the oral cavity is used, and Extract only the lightness or color with the natural tooth, select a color sample of the crown restorative material that is similar to the lightness or color of the target natural tooth, and select the color sample of the target natural tooth based on the selected color sample. The color of the crown restoration material that matches the color can be selected. Therefore, it is possible to objectively select the color of the crown restoration material that matches the color of the target natural tooth regardless of the operator.

Further, according to the color selecting method of the crown restoring material according to the eighth aspect, each color sample of the color guide in which a plurality of color samples of the crown restoring material are arranged and the natural tooth in the oral cavity of the subject. When comparing the color with the tooth color space, first, only the lightness between the above color sample and the natural tooth is extracted by using a color matching filter of a crown restorative material colored with a color complementary to the color space of the tooth. Then, by extracting only the colors of the color sample and the natural teeth by using a color matching filter of a crown restoration material colored to reduce the lightness of the tooth, the lightness of the target natural tooth And a color sample of the crown restoration material similar to the color of the target natural tooth can be selected from the selected crown restoration materials. Therefore, it is possible to more objectively select the color of the crown restoration material that matches the color of the target natural tooth.

[Brief description of the drawings]

FIG. 1 is a plan view showing a color matching filter of a crown restoration material according to the present invention.

FIG. 2 is a diagram illustrating a method for selecting a color of a crown restoration material using a color matching filter of the crown restoration material.

FIG. 3 is a view for explaining a method of selecting a filling color that matches the color of a natural tooth by the above-mentioned method of selecting a restoration material.

FIG. 4 is a view showing a color guide in which a plurality of color samples of a crown restoration material are arranged.

FIG. 5 is a diagram illustrating a conventional method for selecting a color of a crown restoration material.

[Description of Signs] 1 ... color sample of crown restoration material 2 ... color guide 3 ... deleted natural tooth 4 ... natural tooth 5 ... color matching filter of crown restoration material 5a ... lightness extraction filter 5b ... color extraction filter 6 ... Filling

Claims (8)

[Claims] 1. A color guide in which a plurality of color samples of a dental restoration material are arranged and a color of each color sample of a color guide is compared with a color of a natural tooth in an oral cavity of a subject to match a color of a target natural tooth. The color of the crown restorative material is selected, and a color for extracting only the brightness or color between each color sample of the color guide and the natural tooth in the oral cavity is added. Color matching filter. 2. The color according to claim 1, wherein the color for extracting only the lightness between each color sample of the color guide and the natural tooth in the oral cavity is a color that is complementary to the color of the tooth. Color matching filter for crown restoration material. 3. The dental restoration material according to claim 1, wherein the color for extracting only the color between each color sample of the color guide and the natural tooth in the oral cavity is a color for reducing the brightness of the tooth. Color matching filter. 4. The color matching of the crown restorative material according to claim 1, further comprising a wide portion and another narrow portion. filter. 5. The crown according to claim 1, wherein when comparing the color of each color sample of the color guide in which a plurality of color samples of the crown restorative material are arranged with the natural teeth in the oral cavity of the subject. Using the color matching filter of the restoration material, extract only the brightness or color of each color sample of the above color guide and the natural tooth in the oral cavity, and obtain a color sample of the crown restoration material similar to the brightness or color of the target natural tooth. And selecting a color of the crown restoration material that matches the color of the target natural tooth based on the selected color sample. 6. A method for extracting only the brightness of each color sample of the color guide and the natural teeth in the oral cavity by using the color matching filter of the crown restorative material according to claim 2. A method for selecting a color of a crown restoration material according to claim 5. 7. Extraction of only the color of each color sample of the color guide and the natural tooth in the oral cavity is performed by using the color matching filter of the crown restorative material according to claim 3. A method for selecting a color of a crown restoration material according to claim 5. 8. The tooth according to claim 2, when comparing the color of each color sample of the color guide in which a plurality of color samples of the crown restorative material are arranged with the natural tooth in the oral cavity of the subject. 4. Using a color matching filter of a crown restoring material, extracting only the brightness of each of the color samples and the natural teeth, and selecting a color sample of the crown restoring material that is similar to the brightness of the target natural tooth. Using the color matching filter of the dental restoration material described in the above, only the color of each color sample and the natural tooth was extracted and approximated to the color of the natural tooth of interest from the selected dental restoration material Selecting a color sample of the crown restoration material and selecting a color of the crown restoration material that matches the color of the target natural tooth based on the selected color sample; Selection method.