Dental prosthesis molding block and method for producing a dental prosthesis part from the dental prosthesis molding block

Abstract

The present invention relates to a dental prosthesis molding block for producing a dental prosthesis part. The block comprises an inner material that is at least partially surrounded by an outer material, the hardness of which differs from the hardness of the inner material. The inner material forms part of a first surface of the dental prosthesis molding block. The invention further relates to a method for producing a dental prosthesis part. In said method, a dental prosthesis molding block is provided, and the dental prosthesis part is produced by removing material from the dental prosthesis molding block using a CAD/CAM process. In doing so, a pin having a self-tapping external screw thread is created.

Claims

1. Dental prosthesis molding block for producing a dental prosthesis part, comprising: an opening; an inner material with a second region of the opening disposed within the inner material; and an outer material with a first region of the opening disposed within the outer material; wherein the inner material comprises an extension into the outer material such that the extension and the second region are at least physically and partially surrounded by the outer material and an end surface of the inner material proximal to a second surface of the dental prosthesis molding block is embedded in the outer material, wherein the hardness of the outer material differs from the hardness of the inner material, wherein the inner material forms a part of a first surface of the dental prosthesis molding block that also includes the outer material, the first surface being opposite to the second surface, wherein the opening comprises an internal screw thread disposed in the inner material, the opening extending from the second surface, through the outer material and into the inner material, wherein the second surface does not include the inner material, wherein the first region of the opening comprises smooth inner walls, wherein the second region of the opening comprises the internal screw thread, and wherein the dental prosthesis part is an implant.

2. Dental prosthesis molding block according to claim 1, further comprising: a pin with a self-tapping external thread is arranged on the first surface of the dental prosthesis molding block; wherein the pin is integrally formed with the inner material.

3. Dental prosthesis molding block according to claim 1, wherein the inner material has a greater hardness than the outer material.

4. Dental prosthesis molding block according to claim 3, wherein the inner material is a ceramic.

5. Dental prosthesis molding block according to claim 1, wherein the inner material has a lower hardness than the outer material.

6. Dental prosthesis molding block according to claim 5, wherein the inner material is a metal and the outer material is a ceramic.

7. Dental prosthesis molding block according to claim 5, wherein the inner material and the outer material are metals.

8. Method for producing a dental prosthesis part comprising the steps of: providing a dental prosthesis molding block according to claim 1, and producing the dental prosthesis part by removing material from the dental prosthesis molding block using a CAD/CAM process, whereby a pin having a self-tapping external screw thread and a cut-out piece is created, wherein the pin is formed from a portion of the inner material, and the cut-out piece connects the dental prosthesis part to the dental prosthesis molding block.

9. Method according to claim 8, wherein the pin is first formed in a first region of the dental prosthesis molding block by completely removing the outer material and partially removing the inner material, and then the outer material is partially removed in a second region of the dental prosthesis molding block, so that there is no surface of the dental prosthesis molding block in the second region on which the inner material is exposed.

10. Method according to claim 8, wherein the dental prosthesis molding block includes an opening having the internal screw thread, the opening extending from the second surface through the outer material into the inner material and the dental prosthesis part is produced in such a way that a dental prosthesis supply element is screwable into the internal screw thread of the dental prosthesis part.

11. Method according to claim 8, wherein the dental prosthesis part is produced on the basis of data from a patient acquired by an intraoral camera.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) Design examples of the invention are shown in drawings and are explained in more detail in the following description.

(2) FIG. 1 shows an isometric illustration of a dental prosthesis molding block.

(3) FIG. 2 shows a cross-sectional view of the dental prosthesis molding block according to FIG. 1.

(4) FIG. 3 shows an isometric illustration of a dental prosthesis molding block according to a design example of the invention.

(5) FIG. 4 shows a cross-sectional view of the dental prosthesis molding block according to FIG. 3, which has been rotated 180 in the plane of the drawing.

(6) FIG. 5 shows a first processing step of a dental prosthesis molding block in a method according to a design example of the invention.

(7) FIG. 6 shows a second processing step of a dental prosthesis molding block in a method according to a design example of the invention.

(8) FIG. 7 shows a third processing step of a dental prosthesis molding block in a method according to a design example of the invention.

(9) FIG. 8 shows a cross-sectional view of a dental prosthesis part which can be produced using a design example of the method according to the invention.

(10) FIG. 9 shows a first processing step of a dental prosthesis molding block in a method according to another design example of the invention.

(11) FIG. 10 shows a second processing step of the dental prosthesis molding block in a method according to another design example of the invention.

DETAILED DESCRIPTION OF THE INVENTION

(12) A cuboid dental prosthesis molding block 10 having a first surface 11 and an opposite second surface 12 is shown in FIGS. 1 and 2. A core of the dental prosthesis molding block 10 includes titanium as an inner material 13. Zirconium dioxide is pressed onto this as an outer material 14. The first surface 11 thus consists partly of titanium and partly of zirconium dioxide, while all the other surfaces of the dental prosthesis molding block 10 consist exclusively of zirconium dioxide. The inner material 13 is exposed on the surface 11 and is surrounded in a frame-like manner by the outer material 14. All other surfaces of the dental prosthesis molding block 10 are formed by the outer material.

(13) The core of the dental prosthesis molding block 10 may include titanium as an inner material 13 and the outer material 14 may be a cobalt-chromium alloy or a glass ceramic.

(14) The core of the dental prosthesis molding block 10 may also include zirconium dioxide as an inner material 13. The outer material 14 may be titanium, for example, a cobalt-chromium alloy or a glass ceramic.

(15) In one design example of the dental prosthesis molding block 10 according to the invention, which is shown in FIGS. 3 and 4, said molding block consists of the same materials as described above. Starting from the second surface 12, an opening 15 extends through the outer material 14 into the inner material 13. Whereas the region 151 in the outer material 14 has smooth inner walls, the region 152 in the inner material 13 is provided with an internal screw thread 153.

(16) In a first design example of the method according to the invention, a desired form of a dental prosthesis part is defined in a dental CAD/CAM system 30 on the basis of data from a patient. This data can be obtained with the aid of an intraoral camera, for example. A dental prosthesis molding block 10 is then inserted into the CAD/CAM system 30 according to the design example according to the invention described above, and secured there on its second surface 12 by means of a block holder 31. This is shown in FIG. 5. Material removal tools 32, 33 are positioned above and below the dental prosthesis molding block 10.

(17) The material removal tools 32, 33 are used to remove material from the dental prosthesis molding block 10, starting at the first surface 11, to first form a pin 20 having a self-tapping external screw thread. This is shown in FIG. 6. The outer material 14 is completely removed in a first region of the dental prosthesis molding block 10. The inner material 13 is partially removed in this region to form the pin 20. Then, as shown in FIG. 7, a dental prosthesis part 50 is formed, which at the end of the material removal is connected to the dental prosthesis molding block 10 only by a cut-out piece 51. To do this, the outer material 14 is partially removed in a second region of the dental prosthesis molding block 10 without exposing the inner material 13 in said second region. After removal of the cut-out piece 51, the finished dental prosthesis part 50, which is formed in one piece with the pin 20, can be removed from the CAD/CAM system 30.

(18) Since the dental prosthesis part 50 was produced from a dental prosthesis molding block 10 according to the invention (FIG. 4), it still has the internal screw thread 153 between the pin 20 and a surface created in the course of the material removal, which is opposite to the pin 20. The region 151 of the opening 15, which has no internal screw thread, was completely removed in the process. A dental prosthesis supply element 60 in the form of an abutment can be screwed into the internal screw thread by means of a screw 61, as shown in FIG. 8.

(19) The examples of the dental prosthesis molding block and the method described above make the one-piece, customized production of dental prosthesis parts in the form of implants possible.