JPS6345227B

PCT No. PCT/DE80/00141 Sec. 371 Date May 26, 1982 Sec. 102(e) Date May 26, 1982 PCT Filed Oct. 1, 1980 PCT Pub. No. WO82/01127 PCT Pub. Date Apr. 15, 1982.An auditory ossicle prosthesis is described, comprising a plate (1), a shaft (2) applied eccentrically to the underside (3) of the plate and a groove (7) set into the top side (8) of the plate. The plate (1) has a mirror symmetric configuration with respect to at least one symmetry plane (5) perpendicular to the plane of the plate (8). The shaft (2) is applied so that its contact surface (4) is located on the trace (5) of the (principal) symmetry plane (5) of the plate (1), but at least removed from the boundary area of the plate (1) by one half of the shaft cross section. Preferably, the axis (9) of the shaft (2) includes with the normal (10) of the underside (3) of the plate an angle alpha of the order of magnitude of alpha =15 DEG +/-5 DEG . The groove (7) is arranged in the top side (8) of the plate, in its front half and aligned perpendicularly to the symmetry plane (5) of the prosthesis. The prosthesis may consist of a single piece or of two pieces. It consists of a bioactive material. A process is further provided for the final treatment of the prosthesis immediately prior to or during the implantation process. This process is characterized in that a bioactive powder material, in particular homologous bone particles, is sprinkled onto the prosthesis which has been prepared for implantation. This may also be effected during the actual implantation process in situ.