Bone prosthesis and method for its placement

A method for arranging a prosthesis for at least a portion of a bone of a body, in particular a human body, in particular a bone or portion thereof to which in the natural condition a tendon of a muscle is attached, wherein the prosthesis for at least a portion of a bone of a body, in particular a bone or portion thereof to which in the natural condition a tendon of a muscle is attached, wherein the prosthesis is manufactured of a metal or of an alloy thereof and is provided with at least one area situated in the surface of the prosthesis that faces outward once the prosthesis has been placed in the body, said area being formed by a layer of material provided with open spaces that are connected to each other, so as to form a porous area,

• wherein the open spaces are dimensioned for allowing the growth of bone tissue therein, and
• wherein the porous area is a local area at the outer surface of the prosthesis, the local area being surrounded by surfaces of the outer surface of the prosthesis, said surfaces being without pores and being smooth surfaces,
• the method comprising the following steps:
• a-detaching tendons from the bone area to be replaced and removing the bone area to be replaced;
• b-positioning the prosthesis at the wanted location;
• c-at least temporarily securing the tendons, with their original enthesis in a bone fragment, on the prosthesis, in engagement with the said porous areas;
• and
• d-promoting the formation of bone tissue in the open spaces of the porous areas and through bone healing allowing the bone fragment to attach to the bone tissue formed in the pores in the said area of the prosthesis,
• the method being carried out for the arrangement of a prosthesis for at least a portion of a bone of a body, in particular a bone or portion thereof to which in the natural condition a tendon of a muscle is attached, wherein the prosthesis is manufactured of a metal or of an alloy thereof and is provided with at least one area situated in the surface of the prosthesis that faces outward once the prosthesis has been placed in the body, said area being formed by a layer of material provided with open spaces that are connected to each other, the prosthesis comprising a head part to replace the condylar head and an attachment plate for attaching the prosthesis to the ascending branch of the lower branch, and a condylar neck connecting them to each other, wherein the condylar neck is provided with one or more of the aforementioned areas wherein in step a) the at least one branch of the lateral pterygoid muscle, with original enthesis including bone fragment, is detached from the bone area to be replaced, and wherein in step c) the branch in question of the lateral pterygoid muscle, with original enthesis including bone fragment, is secured on the prosthesis, on the porous area on the antero-medial side of the condylar neck.