Prosthesis fixation with mechanically compacted biocompatible granules

A method for preparation of a prosthesis having a stem for fixation in a hole in a bone, comprising providing the prosthesis with compacting means for forcing a mass against an inner wall of the hole in the bone which compacting means encloses at least one space, into which at least one space the mass is introduced, said mass comprising at least granules of a biocompatible material having a sponge-like structure and into which said prosthesis is to be positioned, said compacting means including the stem, cams and a casing surrounding at least a portion of the stem and having openings and where the stem and the cams are moveable relative to the casing.

Assembly for fixating a prosthesis in a hole in bone, comprising a mechanical compacting device and a mass comprising at least granules of a biocompatible material, the mechanical compacting device including compacting means for forcing the mass against an inner wall of the hole upon relative movement of at least a first part of the compacting means relative to a second part thereof, such that the volume of at least one space between at least part of an outer surface of the compacting means and the adjacent inner surface of said hole is reduced, wherein the granules have a sponge like structure, such that bone and tissue can grow into said mass and wherein the compacting device is at least partly integrated with the prosthesis.

Method for preparation of a prosthesis for fixation in an opening such as a bore in bone, comprising providing the prosthesis with compacting means for forcing a mass against an inner wall of the bore, characterized in that said compacting means enclose at least one space, into which at least one space the mass is introduced, said mass comprising at least granules of a biocompatible material having a sponge like structure and into which said prosthesis is to be positioned, said compacting means being arranged for compacting said mass around at least part of fixation means of said prosthesis and wherein said compacting means is at least partly integrated with the prosthesis.

A prosthesis assembly for fixating a prosthesis having a stem for insertion into a hole in bone, the assembly comprising a mechanical compacting device including the stem and a casing surrounding at least a portion of the stem and where the stem is moveable relative to the casing and a mass comprising at least granules of a biocompatible material, wherein the mechanical compacting device includes compacting means for forcing the mass against an inner wall of the hole upon movement of the stem relative to the casing when the assembly is within the hole.