METHOD FOR PRODUCING A PARTIAL OR TOTAL PROSTHESIS, AND PROSTHESIS OBTAINABLE BY THIS METHOD

Abstract

The invention relates to a method for the production of a dental prosthetic moulded part, such as a partial or total prosthesis, which is produced in a multilayered manner from a generatively produced solid body model of at least one prosthetic tooth or of a prosthetic dental arch, wherein, inside, tooth neck-sided, the prosthetic teeth have a lumen, in which a dentin-hued, polymerisable composition is filled. The composition is subsequently polymerised in at least one step. The at least one prosthetic tooth with dentin-hued composition is arranged, with its cervical side, on the tooth-sided surface of the denture base and compacted. Subsequently, the partial or total prosthesis obtained is completely cured in a light curing device. The prosthetic moulded parts obtainable according to the method according to the invention are also a subject matter of the invention.

Claims

1. A method for the production of a dental prosthetic moulded part (5) comprising at least one prosthetic tooth (6) and a denture base (9), in which (A) 1. (i) the digital data of the virtual model of the surface of the at least one prosthetic tooth (1) are provided, and (ii) the digital data of the virtual model of the surface of the denture base (plate) are provided, or 2. (i) the digital data of a virtual model of the surface (0) of the moulded part comprising the at least one prosthetic tooth (1) and the denture base (2) are provided, (ii) the digital data of the virtual model of the surface (0) are split into the digital data of the virtual model of the surface of the at least one prosthetic tooth (1), and into the digital data of the virtual model of the surface of the denture base (2), wherein the surface of the respective at least one prosthetic tooth (1) forms an internal lumen, and (iii) the digital data of the virtual model of the surface of the at least one prosthetic tooth (1) having an internal lumen (4) are converted into digital data of a virtual solid body model (11) based on the data of the virtual model of the surface (1) by calculating a defined wall thickness (3) at the inside of the surface inside the virtual model of the surface of the at least one prosthetic tooth (1) and obtaining the virtual solid body model (11) of the at least one prosthetic tooth (1), and, optionally, (iv) the virtual solid body model (11) of the at least one prosthetic tooth (1) is digitally disassembled into parallel layers, (v) the digital data of the virtual model of the surface of the denture base (2) of step (ii) are available as data of a virtual model having an enclosed surface in area (2.2) or are enclosed in area (2.2), or an enclosed surface is generated in the at least one area (2.2), in which the virtual model of the at least one prosthetic tooth (1) and the virtual model of the denture base (2) have been split, and, optionally, (vi) the virtual model of the denture base (2) is digitally disassembled into parallel layers, (vii) performing step combinations (iii) and (iv) or (v) and (vi) in the order of (iii), (iv), (v) and (vi) or (v), (vi), (iii) and (iv), (B) (viii) each independently, producing the at least one prosthetic tooth (6) and the denture base (9) in a generative method, (ix) joining the at least one prosthetic tooth (6) and the denture base (9) into a dental prosthetic moulded part (5), and (x) obtaining the dental prosthetic moulded part (5) having at least one prosthetic tooth (6) and a denture base (9).

2. The method according to claim 1, wherein (i) the wall thickness of the virtual solid body model (11) is at least from 0.005 mm to 5 mm, or (ii) the solid body model (11) is available without internal lumen (4), wherein the cervical, inner surface of the solid body model (11), in the area of the respective tooth neck, corresponds to a negative of the tooth-sided, outer area (2.2) of the surface of the denture base (2).

3. The method according to claim 1, wherein two or more prosthetic teeth (1) constitute a virtual solid body model (11) by being connected, each approximately, and forming at least one part of a dental arch.

4. The method according to claim 1, wherein the digital parallel layers have a layer thickness (z-data) of 5 to 200 m.

5. The method according to claim 1, wherein the generative method comprises a photochemical polymerisation, stereolithography and/or 3D-printing.

6. The method according to claim 1, wherein the generative method is based on photochemical polymerisation of a liquid composition comprising monomers and/or polymers activated by a light source.

7. The method according to claim 1, wherein a) from the virtual solid body model (11) having a lumen (4), at least one prosthetic tooth (6) having a lumen (4) or prosthetic teeth (6) having at least one lumen (4) up to respectively one lumen (4) per tooth are produced in a generative method, or b) from the virtual solid body model (11) optionally comprising at least one prosthetic tooth (6) having a lumen (4) up to a solid body model (11), in which the at least one prosthetic tooth (6) is available without internal lumen (4), wherein the surface of said solid body model (11), in the cervical area of the respective tooth neck of the prosthetic teeth (6) without internal lumen (4), corresponds to a negative of the tooth-sided outer surface of the area (2.2) of the denture base (2), and at least one prosthetic tooth (6) is produced in a generative method.

8. The method according to claim 1, wherein in a method step (B), after performing step (viii) the at least one prosthetic tooth (6) having a lumen (4) or the prosthetic teeth (6) having at least one lumen up to respectively one lumen (4) per tooth, the at least one lumen (4) is filled up, at least in part, with a polymerisable, dental composition, optionally, the dental composition is polymerised at least in part, and in a further method step (ix) joining the at least one prosthetic tooth (6) and the denture base (9) into a dental prosthetic moulded part (5) ensues by mating together the at least one prosthetic tooth (6) with its cervical area to the corresponding tooth-sided areas (2.2) of the denture base, and (x) the dental prosthetic moulded part (5) of a partial or total prosthesis is obtained.

9. The method according to claim 1, wherein (ix) joining ensues by a) mating together and, subsequently, the dental composition is polymerised, b) gluing together, c) melting together, d) welding together and/or e) shrinking together the at least one prosthetic tooth (6) and the denture base (9) into a dental prosthetic moulded part (5).

10. The method according to claim 7, wherein, (a) filling a polymerisable, dental composition in the lumen (4) of the at least one prosthetic tooth (6), and (b) polymerising the composition, and, optionally, repeating steps a) and b), and (c) joining the at least one prosthetic tooth (6), in the cervical area, to the corresponding tooth-sided areas (2.2) of the denture base (9), or (c) joining the at least one prosthetic tooth (6), in the cervical area, to the corresponding tooth-sided areas (2.2) of the denture base (9) and polymerising the composition, wherein the at least one prosthetic tooth (6) is connected to the denture base (9) by mating and optionally polymerising.

11. The method according to claim 8, wherein the polymerisable, dental composition is a flowable, dentin-hued composition.

12. A prosthetic moulded part obtainable by a method according to claim 1.

13. Method of using a flowable, dentin-hued, polymerisable, dental composition comprising dental glasses in a method according to claim 1.

14. Method of using a total or partial prosthesis obtainable by the method according to claim 1 as (i) temporary prosthesis or (ii) as real model of a temporary prosthesis for adjusting the temporary prosthesis to the dental condition of the patient, or (iii) as real model of a temporary prosthesis for adjusting the temporary prosthesis to the dental condition of the patient and for scanning of the thus adjusted temporary prosthesis, as well as, optionally, for adjustment of the virtual model of the at least one prosthetic tooth (1) and the denture base (plate) (2) for generative production of the total or partial prosthesis of the patient.

15. The prosthetic moulded part according to claim 12, wherein the moulded part is at least one prosthetic tooth, partial/complete prosthetic dental arch, multilayered and/or multicoloured prosthetic tooth, multilayered and/or multicoloured partial/complete dental arch, denture base (plate) and/or total or partial prosthesis

Description

[0098] The shematic FIGS. 1 to 4 represent an embodiment of the invention without limiting the invention to these embodiments.

[0099] FIG. 1 sliced total prosthesis 0 or digital data of the virtual model of the surface 0 of the prosthetic moulded part

[0100] FIG. 2a: denture base (plate) 2 after file splitting

[0101] FIG. 2b: dental prostheses 1 after file splitting

[0102] FIG. 3: sectional view real total prosthesis 5 with prosthetic tooth 6 of a defined wall thickness 7 and a polymerisable composition 8 in lumen 4 joined on a denture base plate 9.

[0103] FIG. 4a: sectional view virtual dental prosthesis/es 1 having a defined wall thickness 3/7a and a lumen 4.

[0104] FIG. 4b: sectional view real dental prosthesis/es 6 having defined wall thickness 7b and a lumen 4.

[0105] FIG. 4c: sectional view of the real dental prosthesis/es 6 which is partially filled up with dentin-hued, unpolymerised composition 12.

EXAMPLES

[0106] FIG. 1 shows a sliced total prosthesis 0 from the digital data of the virtual model of the surface 0 of the prosthetic moulded part. This data set is subsequently split by the software (file splitting) into the digital data of the denture base (plate), which is shown in FIG. 2a as denture base plate 2, and into the digital data of the dental prostheses 1, which are shown in FIG. 2b as surface mantle of the dental prostheses. The cervical area of the prosthetic tooth sits as 1.2 at the tooth neck (bottom side not visible). Furthermore, FIG. 1 shows the supragingival surface 2.3 of the denture base (above the gums).

[0107] In FIG. 2a, the crestal area 2.2 is additionally shown in which the virtual model of the at least one prosthetic tooth 1 or the prosthetic teeth 1 and the virtual model of the denture base 2 have been split or, alternatively, the enclosed crestal surface 2.2 in this area. The cervical area 1.2 of the prosthetic tooth is joined in area 2.2, in particular by polymerisation of waste dental composition 12, subsequent to the dental prosthesis and the denture base plate have been compacted.

[0108] FIG. 3 shows a sectional view of the produced real total prosthesis 5 with prosthetic tooth 6. The prosthetic tooth has a defined wall thickness 7 and a polymerisable composition 8 in lumen 4. The prosthetic tooth 6 has been joined on a denture base plate 9.

[0109] In FIGS. 4a to 4c, various stages of the production of the prosthetic tooth 1 are shown. FIG. 4a shows a cross-section through the virtual model 1 of the tooth of the solid body model 11 having a constructed defined wall thickness 3 and remaining lumen or cavity 4, respectively. The cervical area is represented by 1.2. The real prosthetic tooth 6 having defined wall thickness 7 and a lumen 4 is produced from this solid body model in a stereolitography method, such as shown in FIG. 4b. FIG. 4c shown a further method step, in which the dental, dentin-hued composition 12 is filled in the lumen 4 of the prosthetic tooth 6. The composition 12 may be polymerised and, subsequently, further dental composition 12 may be filled in the lumen. When the lumen is filled, the prosthetic tooth 6 is put on the denture base 9, compacted and polymerised by UV-light. The partial or total prosthesis 5 thus produced may be post-tempered in light oven.

[0110] In the following, two typical compositions for the dental, polymerisable composition in the generative method for the production of the dental prostheses 6 and the denture base plate 9 (table 1) and for the dentin-hued composition (table 2) are stated.

TABLE-US-00001 TABLE 1 Example for composition base plate + tooth enamel % by weight ethoxylated bisphenol-A dimethacrylate 4 urethane dimethacrylate 55 pentaerythritol, propoxylated tetraacrylate 7 aliphatic dimethacrylate 16.5 pyrogenic silica 16 camphorquinone 0.1 Lucirin TPO 0.7 tertiary aromatic amine 0.1 stabilizers 0.1 UV-absorbers 0.3 pigments 0.2

TABLE-US-00002 TABLE 2 Example for composition dentin-hued composition (flowable) % by weight ethoxylated bisphenol-A dimethacrylate 25 triethylene glycol dimethacrylate 12 tertiary aromatic amine 0.1 dimethoxydiphenylethan-1-on 0.1 camphorquinone 0.2 UV-absorbers 0.3 stabilizers 0.1 pyrogenic silica 5 dental glass 57 pigments 0.2

LIST OF REFERENCE NUMERALS

[0111] 0 digital data of the virtual model of the surface of the prosthetic moulded part (surface envelope) [0112] 1 surface of the at least one prosthetic tooth (surface mantle) [0113] 1.2 cervical area prosthetic tooth (tooth neck) [0114] 2 digital data of the virtual model of the surface of the denture base (plate), (surface mantle) [0115] 2.2 tooth-sided area, which forms by splitting the virtual model of the at least one prosthetic tooth 1 or the prosthetic teeth 1 and the virtual model of the denture base 2, or, alternatively, the enclosed tooth-sided surface 2.2 in this area [0116] 2.3 supragingival surface of the denture base (above the gums, gums-sided surface) [0117] 3 defined wall thickness, digital wall thickness in solid body model 11 [0118] 4 lumen, inside the prosthetic tooth synonymously: cavity, recesses [0119] 5 prosthetic moulded part [0120] 6 prosthetic tooth or prosthetic teeth [0121] 7 wall thickness of the prosthetic tooth/teeth (1/6) (7a: virtual prosthetic tooth/teeth, 7b: real prosthetic tooth/teeth) [0122] 8 dentin-hued, polymerised composition in lumen 4, [0123] 9 denture base (plate) [0124] 10 virtual solid body model of the denture base 2, in particular the solid body model 10 is digitally disassembled into parallel layers, and producing the denture base 9 in a generative method [0125] 11 virtual solid body model of the at least one prosthetic tooth, of multiple prosthetic teeth, of the dental arch [0126] 12 dentin-hued, unpolymerised composition