Method for Designing a Mandibular Joint Prosthesis and Corresponding Production Method

1 . A method for designing a mandibular joint prosthesis for a skull side of a patient to be treated, having the following steps:

providing a three-dimensional (3D) representation of the skull comprising at least the mandibular joint of the patient;

providing a three-dimensional, (3D) model for at least one functional group of the mandibular joint prosthesis, wherein the functional group includes at least one condyle head and a fossa sliding surface for the condyle head;

arranging the provided 3D model with respect to the 3D representation of the skull on a reference skull side of the 3D representation, wherein the reference skull side is a skull side opposite to the skull side to be treated;

adapting the provided 3D model in size and alignment to the anatomical conditions of the 3D representation on the reference skull side;

mirroring a condyle head model from the reference skull side on the skull side to be treated, wherein the condyle head model is formed either by a condyle head of the 3D representation on the reference skull side or by at least one part of the condyle head of the 3D model;

extracting a fossa sliding surface from the adapted 3D model;

arranging the extracted fossa sliding surface on the skull side to be treated;

adapting the mirrored condyle head model and the fossa sliding surface to one another and/or to an anatomy of the 3D representation on the skull side to be treated; and

outputting construction data for the mandibular joint prosthesis, which include at least the adapted mirrored condyle head model ( 26 ) and the adapted fossa sliding surface.

2 . The method as claimed in claim 1 , further comprising:

designing a fossa main body of the mandibular joint prosthesis in such a way that the fossa main body bears the fossa sliding surface.

3 . The method as claimed in claim 1 , wherein:

the adapted mirrored condyle head model is designed as part of a separate cranium component of the mandibular joint prosthesis; and

the adapted fossa sliding surface of the mandibular joint prosthesis is designed as part of a separate mandible component of the mandibular joint prosthesis.

4 . The method as claimed in claim 3 , wherein the cranium component and the mandible component are each designed in such a way that they include a respective eye, by means of which the cranium component and the mandible component can be coupled to one another by a suture or a band.

5 . The method as claimed in claim 1 , further comprising:

producing the mandibular joint prosthesis according to the output construction data.

6 . The method as claimed in claim 5 , wherein at least parts of the mandibular joint prosthesis are created by means of a generative method using laser melting.

7 . The method as claimed in claim 5 , wherein the fossa sliding surface of the mandibular joint prosthesis is formed as a sliding layer made of a plastic, in particular made of a polyethylene.

8 . The method as claimed in claim 5 , wherein the mandible component, in addition to a condyle head according to the condyle head model, has at least one mandible fixation plate for fixing the mandible component on the mandible of the patient; and wherein the mandible component is manufactured in one piece from titanium.

9 . The method as claimed in claim 5 , wherein the cranium component is formed from a composite of titanium and a polyethylene and has a cranium fixation plate for fixing the cranium component on the cranium of the patient, which cranium fixation plate is formed from titanium.

10 . A computer system, which is configured to execute program code to carry out the method as claimed in claim 1 .