METHOD FOR PRODUCING AN ANATOMICAL DENTAL IMPLANT

Abstract

A method for producing a bone replacement, a cavity or a bone being detected in a fully automated manner and the bone replacement being produced based on the detection also in a fully automated manner. It is also possible to produce information in relation to medical instruments or navigation information in a fully automated manner.

Claims

1. A method for producing a bone replacement, wherein the method includes the following steps: measuring a cavity in a bone for producing initial data which are indicative for a structure of the cavity, producing processing data from the initial data, wherein the processing data are indicative for an intended structure of the bone replacement, and producing the bone replacement by automated processing using the processing data.

2. The method as claimed in claim 1, wherein the cavity is arranged in a mandible or maxilla for receiving a tooth root.

3. The method as claimed in claim 1, wherein the step of measuring the cavity is carried out while a tooth or tooth replacement or a tooth root or a tooth root replacement is situated in the cavity.

4. The method as claimed in claim 1, wherein the step of measuring the cavity is carried out by means of computed tomography (CT), magnetic resonance imaging (MRI) or digital video tomography (DVT).

5. The method as claimed in claim 1, wherein the initial data are converted into computer-aided design (CAD) data and the processing data are produced on the basis of the CAD data.

6. The method as claimed in claim 1, wherein the processing data are produced dependent on the cavity and/or a position of the cavity.

7. The method as claimed in claim 1, wherein a finite element analysis is applied to the processing data before producing the bone replacement, to be precise, in particular, taking account of data in respect of the maxilla, mandible, occlusion and/or bone structure.

8. The method as claimed in claim 1, including the step of optimizing and/or redesigning the processing data before producing the bone replacement.

9. The method as claimed in claim 1, including the step of checking the bone replacement, after the production thereof, by means of computed tomography (CT), magnetic resonance imaging (MRI) or digital video tomography (DVT).

10. The method as claimed in claim 1, including the step of after-treatment of the bone replacement after the production thereof, in particular depending on a check, and in particular at a root region or at a gingiva contact region.

11. The method as claimed in claim 1, wherein the bone replacement is a tooth implant or has a tooth implant.

12. The method as claimed in claim 11, wherein a tooth or tooth replacement situated in the cavity is also measured during the step of measuring the cavity for the purposes of producing further initial data which are indicative for a structure, in particular a surface, of the tooth.

13. The method as claimed in claim 12, wherein further processing data are produced on the basis of the further initial data, said further processing data being indicative for an intended structure of a dental prosthesis and/or for an intended structure of a prosthesis crown/bridge absorption component.

14. The method as claimed in claim 13, wherein the further initial data which are indicative for the intended structure of a dental prosthesis are produced by means of computer-aided design (CAD).

15. The method as claimed in claim 13, including the step of producing a dental prosthesis on the basis of the further initial data, to be precise, in particular, by milling and/or a generative manufacturing method.

16. The method as claimed in claim 15, wherein the dental prosthesis is embodied in integral fashion with a tooth implant or separately from the tooth implant.

17. The method as claimed in claim 15, including the step of checking the dental prosthesis, in particular by means of computed tomography (CT) or a 3D scan.

18. The method as claimed in claim 15, including the step of treating the dental prosthesis further, in particular by way of a surface treatment, wherein the further treatment preferably includes coating a jawbone or gingiva contact region, sterilizing and/or packaging.

19. The method as claimed in claim 1, including the step of ascertaining respective types of a number of instruments, in particular surgical instruments, on the basis of the initial data, the processing data, a root canal, a design of an implant and/or a design of a dental prosthesis.

20. The method as claimed in claim 1, including the step of ascertaining navigation information, in particular in relation to a mandible or a maxilla, on the basis of the initial data, the processing data, a root canal, a design of an implant and/or a design of a dental prosthesis.

21. A bone replacement, produced or producible according to a method as claimed in claim 1.

Description

BRIEF DESCRIPTION OF THE DRAWING

[0049] A person skilled in the art will gather further features and advantages from the exemplary embodiments which are described below with reference to the attached drawings.

[0050] In the drawings:

[0051] FIG. 1: shows a system for the automated production of a bone replacement,

[0052] FIG. 2: shows gingiva with a cavity and a tooth,

[0053] FIG. 3: shows a first exemplary embodiment of a bone replacement, and

[0054] FIG. 4: shows a second exemplary embodiment of a bone replacement.

DETAILED DESCRIPTION OF THE EXEMPLARY EMBODIMENTS

[0055] FIG. 1 shows a system 100 for producing a bone replacement 10.

[0056] The system 100 has a computed tomography (CT) scanner 110. A couch 120, on which a patient 130 lies in the present case, is arranged in front of said computed tomography scanner. The couch 120 can be inserted into the computed tomography scanner 110 such that the patient 130 can be examined by means of the computed tomography scanner 110. In particular, this allows the measurement of a cavity in a bone of the patient 130, for which a bone replacement is intended to be produced. In particular, this can be used to measure a cavity for receiving a tooth and also the tooth situated therein.

[0057] The system 100 further comprises a computer 140 which is connected to the computed tomography scanner 110 for the purposes of receiving data. Depending on its measurement of the patient 130, the computed tomography scanner 110 produces initial data which are supplied to the computer 140. Said data may be both indicative for a cavity in a bone of the patient 130 and indicative for a bone to be imitated, for example a tooth for which a prosthesis is intended to be produced. It should be noted that the computed tomography scanner 110 may also be controlled by the computer 140.

[0058] The computer 140 is configured to convert the initial data into computer-aided design (CAD) data. These CAD data may be displayed to a user such that the latter can carry out a check which prevents subsequent processing steps from using incorrect data.

[0059] A so-called 3D volume model, i.e. a virtual model, of the bone replacement is produced for the CAD processing. The 3D volume model is usually used in a CAD program as a construction basis for the design of a new 3D model. However, the 3D model may be modified also in the present form or by being complemented with further 3D models from data libraries.

[0060] Depending on the CAD data, the computer 140 subsequently produces processing data which specify how a bone replacement is intended to be produced. When producing the processing data, parameters such as the type of cavity and the position of the cavity in the body of the patient 130 are also taken into account.

[0061] Subsequently, a finite element analysis is applied to the processing data. Here too, data in respect of the position of the cavity in the body of the patient 130 and data in respect of a possible occlusion of the cavity and a surrounding bone structure are taken into account.

[0062] The produced processing data are subsequently optimized by means of specific algorithms in order to design the subsequent automated processing and use of the processing data to be as efficient and reliable as possible.

[0063] Furthermore, the system 100 has a machine tool 150. The processing data that are produced and prepared in the computer 140 are supplied to this machine tool 150. The machine tool 150 has a processing tool 155 which, in a manner known per se, is received in the machine tool 150. In particular, this may be a drill or any other material-ablating device.

[0064] The system 100 further has a toolholder 160 adjacent to the machine tool 150. Received in the toolholder 160 is a blank of a bone replacement 10 in order to anchor the latter for the processing by means of the tool 155. The machine tool 150 is embodied to produce the bone replacement 10 in a fully automated manner on the basis of the processing data while said bone replacement is held by the toolholder 160.

[0065] After the production of the bone replacement 10, the latter may be separately inserted into the computed tomography scanner 110 in order to be checked. To this end, use can be made of, for example, a special holder. Here, once again, appropriate data are produced depending on the measured bone replacement 10, said data being transmitted to the computer 140. The latter compares the actual state to the intended state and decides whether [0066] the bone replacement 10 can be used without change, [0067] the bone replacement 10 requires post-processing, or [0068] the bone replacement 10 was produced so badly that it cannot be used and must be disposed of.

[0069] In the case where post-processing is necessary, the computer 140 is able to produce appropriate processing data for the machine tool 150, said data allowing automated post-processing of the bone replacement 10. The bone replacement 10 can then be inserted anew into the toolholder 160 for post-processing purposes.

[0070] FIG. 2 shows a portion of gingiva 20 with a cavity 25 formed therein. It is understood that the structure of the gingiva 20 is set by a jawbone which is covered by the gingiva 20. Thus, the cavity 25 is also received in the jawbone. A tooth 30 or tooth replacement 30 is received in the cavity 25. It should be noted that this can be, in particular, natural gingiva 20 and a natural tooth 30. By way of example, the apparatus 100 shown in FIG. 1 can be used to measure the cavity 25 and/or the tooth or tooth replacement 30 and hence produce a replacement for the tooth or tooth replacement 30, said replacement being provided in the form of a bone replacement 10 and fitting exactly into the cavity 25.

[0071] FIG. 3 shows an exemplary embodiment of a bone replacement 10 in the form of an artificial tooth. Here, the tooth is subdivided into a tooth implant 12, a dental prosthesis and a prosthesis crown/bridge absorption component 14 that connects the tooth implant 12 and the dental prosthesis 16. These three constituent parts 12, 14, 16 of the tooth 10 can all be produced separately in an automated manner by means of the apparatus 100. As already mentioned further above, it is possible to measure a cavity 25, as a result of which, in particular, the structure of the tooth implant 12 is set. It is likewise possible to measure the structure of a tooth 30, in particular the surface structure thereof, in the computed tomography scanner 110 in order to set the structure of the dental prosthesis 16. The prosthesis crown/bridge absorption component 14 can be produced in an automated manner, or else manually, at the computer 140.

[0072] FIG. 4 shows a bone replacement 10 which is embodied as an integral tooth or tooth replacement. The separation into individual constituent parts, explained with reference to FIG. 3, is consequently not effectuated. Instead, the tooth or the tooth replacement can be produced in one operation from a blank or material by means of the machine tool 150.

[0073] In order to improve the adhesion in the jawbone and/or gingiva and in order to improve the growing together with the jawbone and/or gingiva, a coating 18 is applied to the jawbone and/or gingiva contact region of the tooth. This is a porous coating into or onto which the jawbone and/or the gingiva can grow. Such a coating 18 can be applied, in particular, after/during the processing by means of the system 100, for example within the scope of a chemical process.

[0074] It should be mentioned that, in parallel with the processing data, the computer 140 can also, in particular, produce data in respect of medical instruments to be used and in respect of navigation data. This simplifies the provision of the instruments necessary for an intervention for a treating medical practitioner and also facilitates, for the latter, the use of advanced navigation and assistance devices such as e.g. spectacles or a head-up display with the option of superimposing appropriate information. Such embodiments may also be referred to as augmented reality.