Dental prosthesis coloring method, dental prosthesis coloring system and program

Abstract

To provide a dental prothesis coloring method, a program, and a dental prothesis coloring system for coloring a formed dental prothesis.SOLUTION: The dental prothesis coloring method according to this invention comprises: generating dental color data on the basis of dental color information obtained by using imaging means; and coloring the surface of the dental prothesis formed on the basis of three-dimensional dental shape data generated on the basis of three-dimensional dental shape information generated by using the imaging means, by a coloring device on the basis of the dental color data.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a method for coloring a dental prosthesis, a system for coloring a dental prosthesis, and a program for coloring a dental prosthesis. [Background technology]

[0002] Conventionally, dental prostheses such as inlays, crowns, and bridges have been produced manually by dental technicians, such as by casting. In contrast, CAD / CAM systems, which use computers to design dental prostheses such as inlays, crowns, and bridges and then produce them by cutting, have been attracting attention (Patent Document 1).

[0003] The CAD / CAM system described in Patent Document 1 reads information on the three-dimensional shape of a tooth for which an abutment tooth or cavity has been formed, and in some cases information on the three-dimensional shape of adjacent teeth and opposing teeth.The system then designs the desired dental prosthesis on a computer based on the information on the tooth shape that has been read, and then sets a block-shaped material such as a hardened resin, a sintered ceramic, or a metal body in an automatic cutting machine and cuts it to produce the dental prosthesis. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent Publication No. 2002-224142 Summary of the Invention [Problem to be solved by the invention]

[0005] In Patent Document 1, a dental prosthesis is formed by cutting a block material based on information on the three-dimensional shape of teeth, etc. using a CAD / CAM system, but the coloring of the dental prosthesis is done manually, which is costly. The present invention aims to provide a dental prosthesis coloring method, a dental prosthesis coloring system, and a program for coloring the formed dental prosthesis. [Means for solving the problem]

[0006] In order to achieve the object of the present invention, a method for coloring a dental prosthesis according to the present invention includes a data generation step of generating tooth color data based on tooth color information obtained using an imaging means, and applying color data to the surface of a dental prosthesis formed based on the three-dimensional tooth shape data generated based on the three-dimensional tooth shape information obtained using an imaging means. a coloring step of coloring the teeth using a coloring device based on the tooth color data; A color having a lower hue b* than the hue b* in the chromaticity coordinates defined in the CIE1976 L*a*b* color system included in the tooth color data is colored by the coloring device and is arranged on a part of the surface of the dental prosthesis. And, the data generating step is configured to compare the tooth color information with a predetermined brightness value and not generate color data exceeding the predetermined brightness value; The coloring step is characterized in that the dental prosthesis is colored based on color data that does not exceed the predetermined brightness value. [Effects of the Invention]

[0007] According to the present invention, the formed dental prosthesis can be colored. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a diagram showing the configuration of a dental prosthesis manufacturing system according to the present invention. [Figure 2] FIG. 1 is a diagram showing a flow of producing a dental prosthesis according to a first embodiment of the present invention. [Figure 3] FIG. 1 is an image diagram of a production flow of a dental prosthesis according to a first embodiment of the present invention. [Figure 4] 1 is a schematic diagram of an example of an apparatus that realizes each part of a dental prosthesis manufacturing system according to a first embodiment of the present invention. [Figure 5] 1 is a schematic diagram of an intraoral scanner 1000 according to a first embodiment of the present invention. [Figure 6] 1 is a schematic diagram of a dental CAD 2000 according to a first embodiment of the present invention. [Figure 7] 1 is a schematic diagram of a dental CAM 3000 according to a first embodiment of the present invention. [Figure 8] FIG. 2 is a diagram illustrating a flow of forming a dental prosthesis according to the first embodiment of the present invention. [Figure 9] 1 is a schematic diagram of a coloring device 4000 according to a first embodiment of the present invention. [Figure 10] FIG. 2 is a diagram illustrating a coloring flow of the dental prosthesis according to the first embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

[0010] [First embodiment] FIG. 1 shows the configuration of a dental prosthesis manufacturing system according to the present invention.

[0011] The dental prosthesis manufacturing system of the present invention includes an intraoral information acquisition unit 100 that acquires intraoral information and a data generation unit 200 that generates three-dimensional shape data and color data for a dental prosthesis based on the acquired intraoral information. The dental prosthesis manufacturing system further includes a formation unit 300 that forms a dental prosthesis based on the generated three-dimensional shape data and a coloring unit 400 that colors the surface of the formed dental prosthesis based on the generated color data. The data generation unit 200 and the coloring unit 400 that colors based on the color data generated by the data generation unit 200 function as a dental prosthesis coloring system 500. That is, the coloring system includes the data generation unit 200 that generates tooth color data based on tooth color information and the coloring unit 400 that colors the surface of the formed dental prosthesis based on the color data. The formation unit 300 and the coloring unit 400 may be configured as a single device that performs both processes.

[0012] The flow of dental prosthesis production using the dental prosthesis manufacturing system shown in Figure 2 will be explained below with reference to the image diagram in Figure 3.

[0013] In step S200, the intraoral information acquisition unit 100 acquires intraoral information of the subject from a storage device or the like. The information acquired by the intraoral information acquisition unit 100 includes information on the three-dimensional shape of the teeth and tooth color information. The intraoral information acquisition unit 100 transmits the acquired intraoral information to the data generation unit 200. Note that the intraoral information acquired by the intraoral information acquisition unit 100 here may be intraoral information captured using an imaging means such as an intraoral scanner (see 301 in Figure 3) and transmitted from the imaging device. 301 in Figure 3 shows an image of acquiring intraoral information of a user.

[0014] In step S201, the data generating unit 200 generates three-dimensional tooth shape data and tooth color data based on the intraoral information (see 302 in FIG. 3). The data generating unit 200 generates data including three-dimensional tooth shape information, including information on missing teeth, and color information, from the intraoral information. The data generating unit 200 may generate three-dimensional tooth shape data, for example, based on the difference between master tooth shape information and the transmitted three-dimensional tooth shape information. After generating the three-dimensional tooth shape data and tooth color data, the data generating unit 200 transmits the generated three-dimensional shape data to the forming unit 300 and transmits the color data to the coloring unit 400. In 302 in FIG. 3, dental prostheses are shown in dark colors, and existing teeth are shown in light colors.

[0015] The data generating unit 200 generates three-dimensional tooth shape data and tooth color data based on the intraoral information acquired by the intraoral information acquiring unit 100. The three-dimensional tooth shape data and color data generated by the data generating unit 200 may be mutually related data. As will be described in detail later, for example, color data for a dental prosthesis is generated based on existing tooth color information and color distribution information. In such a case, the color data generated by the data generating unit 200 is based on the three-dimensional tooth shape information and color information, and therefore the generated three-dimensional shape data and color data have a correlation between the two data.

[0016] In step S202, the forming unit 300 forms a dental prosthesis by cutting and grinding the base material of the dental prosthesis based on the acquired three-dimensional shape data of the tooth. After the dental prosthesis is formed by the forming unit 300, the formed dental prosthesis is sent to the coloring unit 400.

[0017] In step S203, the coloring unit 400 colors the surface of the dental prosthesis acquired from the forming unit 300 based on the acquired color data of the dental prosthesis. 303 in Fig. 3 shows an image in which the forming unit 300 forms a dental prosthesis from a base material of the dental prosthesis, and the coloring unit 400 colors the formed dental prosthesis.

[0018] According to this flow, the dental prosthesis coloring system 500 of the present invention can color the formed dental prosthesis. By coloring the dental prosthesis using the coloring system 500, a highly compatible dental prosthesis can be created, as shown in the image of 304 in Figure 3.

[0019] An example of a device that realizes each unit of the dental prosthesis manufacturing system will now be described with reference to FIG. 4. The function of the intraoral information acquisition unit 100 is realized, for example, by an intraoral scanner 1000 (described later with reference to FIG. 5). The intraoral information captured by the intraoral scanner 1000 is transmitted to a dental CAD 2000 (described later with reference to FIG. 6) that has the function of a data generation unit 200. Furthermore, three-dimensional shape data of the dental prosthesis generated by the dental CAD 2000 is transmitted to a dental CAM 3000 (described later with reference to FIG. 7) that has the function of a formation unit 300. Furthermore, color data generated by the dental CAD 2000 is transmitted to a coloring device 4000 (described later with reference to FIG. 9) that has the function of a coloring unit 400. Furthermore, the dental CAD 2000 and the coloring device 4000 may function as a dental prosthesis coloring system 5000 that is an integrated unit. It should be noted that the devices that realize each unit of the dental prosthesis manufacturing system are not limited to those described above. Each device constituting the above-described dental prosthesis manufacturing system will be described below.

[0020] <Intraoral Scanner 1000> First, referring to FIG. 5, a schematic diagram of an intraoral scanner 1000 that realizes the functions of the intraoral information acquisition unit 100 in the dental prosthesis manufacturing system will be described. The intraoral scanner 1000 includes a memory unit 501, an operation unit 502, a communication IF (Interface) 503, and an imaging control unit 504. The memory unit 501 stores acquired tooth information, etc., and the operation unit 502 accepts user operations. The communication IF 503 is implemented by a LAN card or the like and controls communication with an external device (e.g., a dental CAD 2000). The imaging control unit 504 acquires three-dimensional tooth shape information and tooth color information. Here, the three-dimensional tooth shape information and color information acquired by the imaging control unit 504 may be acquired simultaneously or separately. Furthermore, the three-dimensional tooth shape information and color information acquired by the imaging control unit 504 may each be implemented by independent devices.

[0021] The three-dimensional shape information and color information of the teeth acquired by the imaging control unit 504 are stored in the memory unit 501 and transmitted to the dental CAD 2000 using the communication IF 503. The intraoral information acquisition unit 100 may be realized by a device that acquires pre-imaged intraoral information from a storage device or the like. The intraoral scanner 1000 is a scanner for acquiring intraoral information and does not necessarily need to be inserted into the oral cavity to capture images. For example, the intraoral information acquisition unit 100 may take an intraoral seal and scan it to acquire three-dimensional shape information of the teeth.

[0022] <Dental CAD2000> Next, an example of a schematic diagram of a dental CAD 2000 that realizes the functions of the data generation unit 200 in the dental prosthesis manufacturing system is shown. As shown in Fig. 6, the dental CAD 2000 includes a communication IF 601, a ROM 602, a RAM 603, a memory unit 604, an operation unit 605, a display unit 606, and a control unit 607.

[0023] The communication IF 601 is implemented by a LAN card or the like and controls communication with the external intraoral scanner 1000, dental CAM 3000, and coloring device 4000. However, if communication is not required, the communication IF 601 is not essential. The ROM 602 is implemented by a non-volatile memory or the like and stores various programs. The RAM 603 is implemented by a volatile memory or the like and temporarily stores various information. The storage unit 604 is implemented by a hard disk drive (HDD) or solid state drive (SSD) or the like and stores various information. The operation unit 605 is implemented by a keyboard, a mouse, or the like, and the display unit 606 is implemented by a display or the like and displays various information to the user. The operation unit 605 and the display unit 606 may function as components of the dental CAD 2000 as shown in this drawing, or may be configured as devices separate from the dental CAD 2000. The control unit 607 includes a tooth shape information acquisition unit 608, a tooth color information acquisition unit 609, a design unit 610, and a display control unit 611. The dental CAD 2000 receives three-dimensional tooth shape information and color information from the intraoral scanner 1000 via the communication IF 601. In the control unit 607, the shape information acquisition unit 608 and the color information acquisition unit 609 acquire the three-dimensional tooth shape information and color information, respectively, and integrate this information for design in the design unit 610, generating three-dimensional tooth shape data and color data. Note that the shape information acquisition unit 608 and the color information acquisition unit 609 may be replaced by an acquisition unit having both functions. The three-dimensional tooth shape data and color data designed by the design unit 610 are displayed on the display unit 606 via the display control unit 611. The design unit 610 can also perform design through input via the operation unit 605, etc. The three-dimensional shape data and color data designed by the design unit 610 are appropriately recorded in the ROM 602, RAM 603, and storage unit 604. The three-dimensional shape data of the tooth designed by the design unit 610 is transmitted to the dental CAM 3000 via the communication IF, and the color data of the tooth is transmitted to the coloring device 4000. Here, the design unit 610 may obtain, from the three-dimensional shape information and color information, brightness data of the tooth on which the dental prosthesis will be placed, the tooth near the position where the dental prosthesis will be placed, or the tooth corresponding to the tooth on which the dental prosthesis will be placed, and generate color data based on the obtained brightness data.The color data generated by the design unit 610 may also be generated based on appearance prediction data obtained from the three-dimensional shape information and color information, based on the position or posture of the dental prosthesis when viewed from outside the patient's oral cavity. The color data designed by the design unit 610 may include a color with a lower hue b* than the hue b* in the chromaticity coordinates defined by the CIE 1976 L*a*b* color system. Furthermore, colors with a lower hue b* are used in the color data designed by the design unit 610 for a portion of the dental prosthesis. It is more desirable to use colors in the tooth tips and their surrounding areas, which are part of the dental prosthesis, for superior aesthetics. The color data in the design unit 610 may be determined based on at least one of the light source location information, the intensity of the light emitted by the light source, the light frequency, or the color of the light. The display control unit 611 may display multiple color data candidates on the display unit 606. A plurality of color data candidates are displayed on the display unit 606, and a selection acceptance may be performed via the operation unit 605 or the like so that the user can select color data from the plurality of color data candidates.

[0024] In addition, the multiple color data candidates displayed on the display unit 606 may be displayed together with at least one matching score between the tooth on which the dental prosthesis will be placed, the tooth near the position where the dental prosthesis will be placed, or the color information of the tooth corresponding to the tooth on which the dental prosthesis will be placed.

[0025] Furthermore, the design unit 610 may compare tooth color information with a predetermined brightness value and not generate color data that exceeds the predetermined brightness value. Based on the generated color data, a coloring device 4000 that realizes the function of the coloring unit 400 (described later) colors the dental prosthesis based on color data that does not exceed the predetermined brightness value. The design unit 610 eliminates color data that exceeds the predetermined brightness value, thereby improving color reproducibility.

[0026] <Dental CAM3000> An example of the configuration of the dental CAM 3000 will be described with reference to FIG. 7, and a process for forming a dental prosthesis will be described with reference to FIG.

[0027] The dental CAM 3000 includes a communication IF 701, a processing unit 702, a memory unit 703, an operation unit 704, a display unit 705, and a control unit 706. The control unit 706 includes a processing control unit 707 and a display control unit 708.

[0028] In step S801, the dental CAM 3000 receives the three-dimensional shape data generated by the dental CAD 2000 via the communication IF 801. The received three-dimensional shape data is stored in the memory unit 803. The dental CAM 3000 may also acquire tooth color data. The tooth color data will be used in steps described below.

[0029] In step S802, the dental CAM 3000 selects a desired base material for the prosthesis based on the received three-dimensional shape data and color data. The selection of the base material for the prosthesis may be replaced by a base material selection made by the user. This step may be omitted as appropriate, for example, if the base material for the prosthesis has been set in advance. Here, the prosthesis components selected by the dental CAM 3000 are preferably base materials for the prosthesis that are close to the tooth color data received by the dental CAM 3000 from the dental CAD 2000. For example, the base material for the dental prosthesis selected is a base material for the prosthesis that is close to the color data and has a high degree of whiteness. The base material for the dental prosthesis may also contain ceramics and / or resin.

[0030] In step S803, the dental CAM 3000 controls the processing unit 802 via a processing control unit 807 constituting the control unit 806 based on the received three-dimensional shape data, and forms a dental prosthesis by processing a base material of the dental prosthesis. The results of processing and forming by the processing unit 802 can be displayed on the display unit 805 via a display control unit 808. Here, the processing unit 802 may form a dental prosthesis by processing the base material of the prosthesis by cutting and / or grinding. Alternatively, the processing unit 802 may process and form a dental prosthesis by repeatedly irradiating the base material of the prosthesis with light to sequentially sinter or melt and solidify the raw material. The processing unit 802 may form a dental prosthesis by an additive manufacturing method. Alternatively, the control unit 806 may be controlled via the operation unit 804. The dental prosthesis formed by the dental CAM 3000 is used in a coloring process by the coloring device 4000.

[0031] <Coloring device 4000> An example of a coloring device 4000 that realizes the function of the coloring unit 400 in the dental prosthesis manufacturing system will be described with reference to FIG. 9, and a dental prosthesis coloring process including this device will be described with reference to FIG.

[0032] The coloring device 4000 includes a communication IF 901, an operation unit 902, a memory unit 903, a rotation unit 904, a discharge unit 905, and a control unit 906. The control unit 906 includes a position detection unit 907, a shape detection unit 908, a rotation control unit 909, and a discharge control unit 910.

[0033] Hereinafter, a specific example of the process of coloring the formed dental prosthesis based on the color data generated by the data generating unit 200 will be described with reference to FIG.

[0034] In step S1001, the coloring device 4000 receives tooth color data generated by the dental CAD 2000 via the communication IF 901.

[0035] The coloring device 4000 records the received color data in the memory unit 903. The coloring device 4000 holds the dental prosthesis processed and formed by the dental CAM 3000 in the rotation unit 904. The position detection unit 907 detects position data of the dental prosthesis processed and formed by the dental CAM 3000. The shape detection unit 908 detects the shape of the dental prosthesis by receiving the position data of the dental prosthesis detected by the position detection unit 907 or three-dimensional shape data from the dental CAD 2000. Combining the position data detected by the position detection unit 907 with the received three-dimensional shape data improves the accuracy of detection of the shape of the dental prosthesis by the shape detection unit 908. Detection of the shape of the dental prosthesis by the shape detection unit 908 may be replaced by receiving three-dimensional shape data.

[0036] In step S1002, the coloring device 4000 colors the surface of the dental prosthesis formed by the forming device 3000 based on the color data generated by the dental CAD 2000. Specifically, the coloring device 4000 controls the rotation unit 904 with the rotation control unit 909 in accordance with the shape of the dental prosthesis detected by the shape detection unit 908, and colors the dental prosthesis processed and formed by the dental CAM 3000 with coloring material based on the color data while controlling the discharge unit 905 with the discharge control unit 910. After coloring the dental prosthesis, the process proceeds to step S1003. The discharge method of the discharge unit 905 may be inkjet or spray. Here, inkjet may be used for the discharge unit 905 when the amount of coloring material is small. Alternatively, spray may be used as the discharge unit 905 when the amount of coloring material is large. The discharge unit 905 may also have a mechanism that can switch between inkjet and spray. The coloring device 4000 may use two or more coloring materials to color the dental prosthesis, improving the reproducibility of the color data of the dental prosthesis. The coloring device 4000 may also have an applicator (not shown) that applies coloring materials to the dental prosthesis. When the coloring device 4000 applies coloring materials, the applicator may apply multiple layers of coloring materials using different coloring materials. Multi-layer application by the applicator improves the reproducibility of the coloring of the dental prosthesis according to the color data. The multiple coloring materials may have different refractive indices. Using coloring materials with different refractive indices to color the dental prosthesis increases reflectance, allowing for coloring reproducibility with a small amount of application. The coloring material used to color the dental prosthesis by the coloring device 4000 may be selected by referencing a lookup table that links tooth color data with coloring materials. If the coloring device 4000 has a lookup table stored in advance, the computational cost involved in determining the coloring material can be reduced. The coloring material may include B, Si, or resin. A wide color space can be achieved by including B, Si, or resin in the coloring material for coloring dental prostheses.

[0037] Furthermore, the coloring material used to color the dental prosthesis by the coloring device 4000 may contain a scattering material. By using a coloring material containing a scattering material, color reproducibility can be achieved with a smaller amount of application. The scattering material may have a high refractive index. The scattering material with a high refractive index may contain at least one of TiO2, SiO2, and ZrO2.

[0038] In step S1003, the coloring device 4000 determines whether the coloring process is complete. If it is determined that the coloring process is complete, the process ends. If it is determined that the coloring process is not complete, the process proceeds to step S1002, where the coloring process is performed. [Example]

[0039] The present invention will be described in more detail below with reference to examples, but the present invention is not limited to the following examples.

[0040] Example 1 Using the 3D tooth shape data, a Yb fiber laser was irradiated onto the raw material to create a 3D model. Powder 1 in Table 1 was used as the raw material. A 3D shape measuring machine was used to confirm that a prosthesis identical to the 3D tooth shape data had been created. The created prosthesis was then colored with a colorant using an inkjet printer. [Table 1]

[0041] Example 2 As in Example 1, a prosthesis was fabricated using Powder 2 as the raw material.

[0042] It was confirmed that the prostheses of Examples 1 and 2 could be used as dental prostheses.

[0043] (Variation) The present invention can also be realized by executing the following process: software (programs) that realize the functions of the above-described embodiments are supplied to a system or device via a network or various storage media, and the computer (or CPU, MPU, etc.) of the system or device reads and executes the programs. [Explanation of symbols]

[0044] 100 Oral cavity information acquisition unit 200 Data Generation Unit 300 Forming section 400 Coloring section

Claims

1. a data generation step of generating tooth color data based on tooth color information obtained using an imaging means; and a step of applying to the surface of a dental prosthesis formed based on the three-dimensional tooth shape data generated based on the three-dimensional tooth shape information obtained using the imaging means. a coloring step of coloring the teeth using a coloring device based on the tooth color data; a color having a lower hue b* than the hue b* in chromaticity coordinates defined in the CIE 1976 L*a*b* color system included in the tooth color data is colored by the coloring device and is arranged on a part of the surface of the dental prosthesis; the data generating step is configured to compare the tooth color information with a predetermined brightness value and not generate color data exceeding the predetermined brightness value; A method for coloring a dental prosthesis, wherein the coloring step involves coloring the dental prosthesis based on color data that does not exceed the predetermined brightness value.

2. 2. The method for coloring a dental prosthesis according to claim 1, wherein the dental prosthesis contains ceramics and / or resin.

3. 3. The method for coloring a dental prosthesis according to claim 1, wherein the coloring step involves coloring the surface of the dental prosthesis using the coloring device, using brightness data of the tooth on which the dental prosthesis is to be placed, a tooth in the vicinity of the position where the dental prosthesis is to be placed, or a tooth corresponding to the tooth on which the dental prosthesis is to be placed.

4. 4. The method for coloring a dental prosthesis according to claim 1, wherein the coloring step is performed based on predicted data of the appearance of the dental prosthesis from outside the patient's oral cavity, which is based on the position or posture at which the dental prosthesis is placed.

5. 2. The method for coloring a dental prosthesis according to claim 1, wherein the part of the surface of the dental prosthesis is the tip of the dental prosthesis and a portion in the vicinity thereof.

6. 6. The method for coloring a dental prosthesis according to claim 1, wherein the color applied to the surface of the dental prosthesis by the coloring step is determined based on at least one of light source positioning information, the intensity of the light emitted by the light source, the frequency of the light, or the color of the light.

7. 7. The method for coloring a dental prosthesis according to claim 1, further comprising a display step of displaying a plurality of color data candidates for coloring the surface of the dental prosthesis.

8. The method for coloring a dental prosthesis according to claim 7, further comprising a selection receiving step for selecting color data to be used to color the surface of the dental prosthesis from the plurality of displayed color data candidates.

9. 9. A method for coloring a dental prosthesis according to claim 7, wherein the display step displays a plurality of color candidates together with at least one matching score between the tooth on which the dental prosthesis is to be placed, a tooth in the vicinity of the position where the dental prosthesis is to be placed, or color data of a tooth corresponding to the tooth on which the dental prosthesis is to be placed.

10. 10. The method for coloring a dental prosthesis according to claim 1, wherein the coloring step includes a step of applying a coloring material by the coloring device.

11. 11. The method for coloring a dental prosthesis according to claim 10, wherein the coloring step includes a multi-layer coating step using a plurality of different coloring materials.

12. 12. The method for coloring a dental prosthesis according to claim 11, wherein the plurality of coloring materials have refractive indices different from one another.

13. 13. The method for coloring a dental prosthesis according to claim 10, wherein the coloring step includes a lookup table that links the tooth color data with the color material, and by referring to the lookup table, the dental prosthesis is colored using a color material associated with the color data generated by the data generation step.

14. The method for coloring a dental prosthesis according to any one of claims 10 to 13, wherein the coloring material contains a scattering material.

15. The scattering material is at least TiO ２ , SiO ２ , ZrO ２ 15. The method for coloring a dental prosthesis according to claim 14, wherein the scattering material contains any one of the following:

16. 16. The method for coloring a dental prosthesis according to claim 10, wherein the coloring material contains at least one of B, Si, and a resin.

17. A program for causing a coloring device to execute a step of coloring a surface of a dental prosthesis formed using three-dimensional tooth shape data generated based on three-dimensional tooth shape information, using tooth color data generated based on tooth color information of the tooth, a color having a lower hue b* than the hue b* in chromaticity coordinates defined in the CIE 1976 L*a*b* color system included in the tooth color data is colored by the coloring device and is assigned to a part of the surface of the dental prosthesis; the data generating step is configured to compare the tooth color information with a predetermined brightness value and not generate color data exceeding the predetermined brightness value; The program is configured such that the coloring step colors the dental prosthesis based on color data that does not exceed the predetermined brightness value.

18. A system for coloring a dental prosthesis, which colors a dental prosthesis by carrying out each step of the method for coloring a dental prosthesis according to any one of claims 1 to 16.

Images