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CN-122028869-A - Method and device for producing dental restorations and use thereof

CN122028869ACN 122028869 ACN122028869 ACN 122028869ACN-122028869-A

Abstract

A method for making a dental restoration (12) from at least one material of a first material type is described. Wherein the area of the dental restoration (12) made of the material of the first material type has at least two portions of different colors and at least two portions of different color brightness. The method includes providing a first starting material (M1) having a first color, a first color brightness, and a first opacity. The method also includes providing a second starting material (M2) having a second color, a second color brightness, and a second opacity. Then, a region of the dental restoration (12) made of a material of the first material type is constructed by spatially arranging a plurality of volume segments, wherein each volume segment is formed of only one or more materials selected from a first starting material (M1) and a second starting material (M2). Furthermore, a device (10) for producing a dental prosthesis (12) is described. A use is also described.

Inventors

  • HENDRICK JOHN
  • JOSE PULIDO

Assignees

  • 伊沃克拉尔维瓦登特股份公司

Dates

Publication Date
20260512
Application Date
20240809
Priority Date
20230811

Claims (20)

  1. 1. A method for making a dental prosthesis (12) from at least one material of a first material type, wherein a region of the dental prosthesis (12) made from the material of the first material type has at least two portions (36 a, 36b, 36 c) of different colors and at least two portions (36 a, 36b, 36 c) of different color brightness, the method comprising: Providing a first starting material (M1) of the first material type, wherein the first starting material (M1) has a first color (F1), a first color brightness (H1) and a first opacity (O1) (S1), Providing a second starting material (M2) of the first material type, wherein the second starting material (M2) has a second color (F2), a second color brightness (H2) and a second opacity (O2) (S2), and The region of the dental restoration (12) made of the material of the first material type is constructed by spatially arranging a plurality of volume segments (V), wherein each volume segment (V) is formed of only one or more materials selected from the first starting material (M1) and the second starting material (M2).
  2. 2. The method of claim 1, wherein the region of the dental restoration (12) made of the material of the first material type additionally has at least two portions (36 a, 36b, 36 c) of different opacity, and wherein the method further comprises: providing a third starting material (M3) of the first material type, wherein the third starting material (M3) has a third color (F3), a third color brightness (H3) and a third opacity (O3) (S3), -Constructing the region of the dental restoration (12) made of the material of the first material type by spatially arranging a plurality of volume segments (V), wherein each volume segment (V) is formed (S8) of only one or more materials selected from the first starting material (M1), the second starting material (M2) and the third starting material (M3).
  3. 3. The method according to claim 2, wherein two colors selected from the first color (F1), the second color (F2) and the third color (F3) are the same, and/or wherein two colors selected from the first color (F1), the second color (F2) and the third color (F3) are different.
  4. 4. A method according to claim 2 or 3, wherein two color definitions selected from the first color definition (H1), the second color definition (H2) and the third color definition (H3) are the same, and/or wherein two color definitions selected from the first color definition (H1), the second color definition (H2) and the third color definition (H3) are different.
  5. 5. The method according to any one of claims 2 to 4, wherein two opacities selected from the first opacity (O1), the second opacity (O2) and the third opacity (O3) are the same, and/or wherein two opacities selected from the first opacity (O1), the second opacity (O2) and the third opacity (O3) are different.
  6. 6. The method of claim 3,4 and 5, Wherein the first color (F1) is different from the second color (F2), Wherein the third color (F3) is the same as the first color (F1), Wherein the first color definition (H1) is different from the second color definition (H2), Wherein the third color definition (H3) is the same as the first color definition (H1), Wherein the first opacity (O1) is the same as the second opacity (O2), and Wherein the first opacity (O1) is different from the third opacity (O3).
  7. 7. The method of any of the preceding claims, wherein the dental restoration (12) additionally comprises a material of a second material type, wherein a region of the dental restoration (12) made of the material of the second material type has at least two portions (34 a, 34 b) of different colors and at least two portions (34 a, 34 b) of different color brightness, the method further comprising: providing a fourth starting material (M4) of the second material type, wherein the fourth starting material (M4) has a fourth color (F4), a fourth color brightness (H4) and a fourth opacity (O4) (S4), Providing a fifth starting material (M5) of the second material type, wherein the fifth starting material (M5) has a fifth color (F5), a fifth color brightness (H5) and a fifth opacity (O5) (S5), The region of the dental restoration (12) made of the material of the second material type is constructed by spatially arranging a plurality of volume segments (V), wherein each volume segment (V) is formed of only one or more materials selected from the fourth starting material (M4) and the fifth starting material (M5).
  8. 8. The method of claim 7, wherein the region of the dental restoration (12) made of the material of the second material type additionally has at least two portions (34 a, 34 b) of different opacity, the method further comprising: Providing a sixth starting material (M6) of the second material type, wherein the sixth starting material (M6) has a sixth color (F6), a sixth color brightness (H6) and a sixth opacity (O6) (S6), -Constructing the region of the dental restoration (12) made of the material of the second material type by spatially arranging a plurality of volume segments (V), wherein each volume segment (V) is formed (S7) of only one or more materials selected from the fourth starting material (M4), the fifth starting material (M5) and the sixth starting material (M6).
  9. 9. The method according to claim 8, wherein two colors selected from the fourth color (F4), the fifth color (F5) and the sixth color (F6) are the same, and/or wherein two colors selected from the fourth color (F4), the fifth color (F5) and the sixth color (F6) are different.
  10. 10. The method according to claim 8 or 9, wherein two color definitions selected from the fourth color definition (H4), the fifth color definition (H5) and the sixth color definition (H6) are the same, and/or wherein two color definitions selected from the fourth color definition (H4), the fifth color definition (H5) and the sixth color definition (H6) are different.
  11. 11. The method according to any one of claims 8 to 10, wherein two opacities selected from the fourth opacity (O4), the fifth opacity (O5) and the sixth opacity (O6) are the same, and/or wherein two opacities selected from the fourth opacity (O4), the fifth opacity (O5) and the sixth opacity (O6) are different.
  12. 12. The method of claim 9, 10 and 11, Wherein the fourth color (F4) is different from the fifth color (F5), Wherein the sixth color (F6) is the same as the fifth color (F5), Wherein the fourth color definition (H4) is different from the fifth color definition (H5), Wherein the sixth color definition (H6) is the same as the fifth color definition (H5), Wherein the fourth opacity (O4) is the same as the fifth opacity (O5), and Wherein the fourth opacity (O4) is different from the sixth opacity (O6).
  13. 13. The method of any of the preceding claims, wherein the material of the first material type is a tooth replacement material, and wherein the material of the second material type is a gum replacement material, or Wherein the material of the first material type is a gingival replacement material and wherein the material of the second material type is a dental replacement material.
  14. 14. The method of any one of the preceding claims, Wherein in the Lab color model, the first color (F1) is defined by an a-value and a b-value, and the first color brightness (H1) is defined by an L-value, and/or Wherein in the Lab color model, the second color (F2) is defined by an a value and a b value, and the second color brightness (H2) is defined by an L value, and/or Wherein in the Lab color model, the third color (F3) is defined by an a-value and a b-value, and the third color brightness (H3) is defined by an L-value, and/or Wherein in the Lab color model, the fourth color (F4) is defined by an a value and a b value, and the fourth color brightness (H4) is defined by an L value, and/or Wherein in the Lab color model, the fifth color (F5) is defined by an a value and a b value, and the fifth color brightness (H5) is defined by an L value, and/or Wherein in the Lab color model, the sixth color (F6) is defined by an a value and a b value, and the sixth color brightness (H6) is defined by an L value.
  15. 15. The method according to any of the preceding claims, wherein the constructing of the area of the dental restoration (12) made of the material of the first material type is performed in an additive manner, and/or wherein the constructing of the area of the dental restoration (12) made of the material of the second material type is performed in an additive manner.
  16. 16. A device (10) for making a dental prosthesis (12) from at least one material of a first material type, the device comprising: A first supply unit (20) for providing a first starting material (M1) of the first material type, wherein the first starting material (M1) has a first color (F1), a first color brightness (H1) and a first opacity (O1), A second supply unit (22) for providing a second starting material (M2) of the first material type, wherein the second starting material (M2) has a second color (F2), a second color brightness (H2) and a second opacity (O2), and -A build space (18) for building at least one region of the dental prosthesis (12) made of the material of the first material type by spatially arranging a plurality of volume segments (V), wherein each volume segment (V) is formed of only one or more materials selected from the first starting material (M1) and the second starting material (M2).
  17. 17. The device (10) according to claim 16, further comprising a third supply unit (24) for providing a third starting material (M3) of the first material type, wherein the third starting material (M3) has a third color (F3), a third color brightness (H3) and a third opacity (O3), wherein the build space (18) is designed for building at least one region of the dental prosthesis (12) made of the material of the first material type by spatially arranging a plurality of volume segments (V), wherein each volume segment (V) is formed only of one or more materials selected from the first starting material (M1), the second starting material (M2) and the third starting material (M3).
  18. 18. The device (10) according to claim 16 or 17, wherein the device (10) is further designed for making a dental prosthesis (12) comprising a material of the second material type, the device comprising: a fourth supply unit (26) for providing a fourth starting material (M4) of the second material type, wherein the fourth starting material (M4) has a fourth color (F4), a fourth color brightness (H4) and a fourth opacity (O4), A fifth supply unit (28) for providing a fifth starting material (M5) of the second material type, wherein the fifth starting material (M5) has a fifth color (F5), a fifth color brightness (H5) and a fifth opacity (O5), Wherein the build space (18) is designed for building at least one region of the dental restoration (12) made of the material of the second material type by spatially arranging a plurality of volume segments (V), and wherein each volume segment (V) is formed of only one or more materials selected from the fourth starting material (M4) and the fifth starting material (M5).
  19. 19. The device (10) according to claim 18, further comprising a sixth supply unit (30) for providing a sixth starting material (M6) of the second material type, wherein the sixth starting material (M6) has a sixth color (F6), a sixth color brightness (H6) and a sixth opacity (O6), wherein the build space (18) is designed for building at least one region of the dental prosthesis (12) made of the material of the second material type by spatially arranging a plurality of volume segments (V), and wherein each volume segment (V) is formed of only one or more materials selected from the fourth starting material (M4), the fifth starting material (M5) and the sixth starting material (M6).
  20. 20. Use of only a first starting material (M1) of a first material type and a second starting material (M2) of the first material type for producing at least one region of a dental restoration (12) made of a material of the first material type, wherein the region has at least two parts of different colors and at least two parts of different color brightness.

Description

Method and device for producing dental restorations and use thereof The present invention relates to a method for producing a dental restoration from at least one material of a first material type. Furthermore, the invention relates to a device for producing a dental prosthesis from at least one material of a first material type. Furthermore, the invention relates to the use of only a first starting material of a first material type and a second starting material of the first material type. Dental restorations (e.g., replacement teeth, partial or full dentures) should replicate the natural teeth and/or natural gums as faithfully as possible. Thus, the dental restoration should be as visually indistinguishable as possible from the natural teeth and natural gums. That is, the dental restoration should have a realistic appearance. However, the fabrication of dental restorations is often complicated by the uneven color distribution (i.e., at least two portions having different colors), uneven color brightness distribution (i.e., at least two portions having different color brightness), and uneven opacity distribution (i.e., at least two portions having different opacity) of the natural teeth and natural gums. This applies both to variants of manufacturing dental restorations from blanks by milling operations and to variants of manufacturing dental restorations by additive manufacturing methods. Thus, there is a target conflict between fidelity of the dental restoration and the simplicity of its manufacture as much as possible. It is an object of the invention to solve or at least mitigate such object conflicts. The object is achieved by a method for manufacturing a dental prosthesis from at least one material of a first material type. Wherein the area of the dental restoration made of a material of the first material type has at least two different colors and at least two portions of different color brightness. The method comprises the following steps: Providing a first starting material of a first material type, wherein the first starting material has a first color, a first color brightness and a first opacity, Providing a second starting material of the first material type, wherein the second starting material has a second color, a second color brightness, and a second opacity, and A region of a dental restoration made of a material of a first material type is constructed by spatially arranging a plurality of volume segments, wherein each volume segment is formed of only one or more materials selected from a first starting material and a second starting material. In this regard, the first material type of material may be a tooth replacement material or a gum replacement material. The volume segment of the dental prosthesis is understood to mean a very small volume segment compared to the external dimensions of the dental prosthesis. Thus, the volume segment is very small even compared to the macroscopic part of the dental restoration to be replicated (such as the incisal margin of the tooth, the dentin core, the dental neck or the gingival basement, as the case may be). Wherein the volume segment may also be referred to as a voxel. For example, voxels have a length, width, and height of 50 microns each. The fact that each volume segment is formed only from one or more materials selected from the first starting material and the second starting material, among others, includes three alternatives. According to a first alternative, the volume segment is formed by the first starting material only. According to a second alternative, the volume segment is formed by the second starting material only. According to a third alternative, the volume segment is formed by only the first starting material and the second starting material. In a third alternative, the volume segment is also said to be formed by a blend of only the first starting material and the second starting material. In the context of the present invention, on the other hand, such blends are understood to mean the actual physical blend of starting materials. On the other hand, such blends are also understood to mean an arrangement of starting materials in which the starting materials are not physically mixed, however, the arrangement of starting materials is performed on a scale that is so small that the human eye cannot distinguish (i.e., resolve) the various starting materials. In this case, the human eye perceives the blend even though it is not actually present. Techniques such as halftoning and dithering take advantage of this effect. The fact that the dental restoration has at least two parts of different colors and at least two parts of different color brightness gives the dental restoration a realistic appearance. It should be understood that, among other things, portions of different colors and portions of different color brightness may be separate from each other, may overlap partially, or may overlap entirely. According to the invention, this ca