Abstract: An acetabular or cotyloid implant intended in particular for the iliac joint socket, which comprises a metallic cage and an insert made of plastic material. The cage, which is spherical in form, is constituted by a metal frame of slight thickness composed of a network of narrow blades defining therebetween large free spaces, while the insert made of plastic material is solidly assembled with the cage.

Abstract: A skeletal fixator including implant screws, a support angularly indexed with respect to a head of the implant screws and which comprises a cavity provided with a screw thread adapted to receive a connecting rod having a screw thread of pitch different from that of the thread of the cavity. A locking screw cooperates with the head of the implant screw to clamp and bind the connecting rod relative to the implant screws.

Abstract: A screw for a lumbar-sacral fixator for use on the spine wherein the screw comprises a threaded part and a head which has a notched surface which is inclined with respect to an elongated axis of the screw by an angle of approximately 30.degree. to 45.degree..

Abstract: A total prothesis for the metacarpo-phalangeal joint which includes a first element for anchoring in the phalangeal diaphysis having a tapering head provided with at least two articular surfaces of concave profile and a second element for anchoring in the metacarpo diaphysis having a head including at least two separate articular surfaces. One of the articular surfaces of the second element is generally convex and the other articular surface includes an arcuate ridge which extends outwardly relative to the convex articular surface and toward the articular surfaces of the first element.

Abstract: A modular humeral prosthesis including a humeral stem for anchoring which stem includes a bearing face, a spacer in the form of a wedge having a first face which fits on the bearing face of the stem and a second face, and a humeral semi-spherical cap having a base which is fixed with respect to the second face of the spacer. The manner in which the cap and spacer are connected relative to the bearing face of the stem permits the cap to be adjusted angularly in position about an axis which is off-set from the axis of symmetry of the cap. Elements are provided to lock the cap to the spacer and the spacer to the stem.

Abstract: A femoral prosthesis having a bore extending through the stem thereof and which includes a seal surrounding the stem adjacent the bore which acts under pressure of a cement introduced through the bore to seal the cement within the upper portion of the medullary canal of the femur.

Abstract: A quick disconnect coupling assembly for securing a bone implant to the tool for positioning the implant wherein the coupling assembly is carried by the tool and includes axially extending undercut teeth which are receivable within undercut notches formed in the peripheral face of the implant and which are locked therein by an axially reciprocating slideable shim assembly to thereby selectively unite the positioning tool to the implant.

Abstract: A device for osteosynthesis of the fractures of the extremities of the femur comprises a plate in which holes are provided for the passage of screws intended to be inserted into the bone to make the fractured bone and the plate solid.One end of the plate to be applied against one of extremities of the femur is wider than the other end and includes three holes arranged in an isosceles triangle. The median plane of the one end defines a plane which forms, with the plane of the rest of the plate, an obtuse angle of between 160.degree. and 175.degree..

Abstract: A nail for the osteosynthesis of fractures of femoral necks, formed of a resilient pre-curved rod having an inner end engageable into the medullary cavity of the femur through a lateral perforation drilled through the inner side of said femur in the vicinity of the process thereof and an outer end which remains exterior to said femur. The rod comprises in the vicinity of said outer end a portion which is bent twice in opposed directions to determine a shoulder which protrudes inwardly with respect to the curvature of said rod and which abuts against the edge of said perforation to retain said nail longitudinally with respect to said femur.

Abstract: A hip prosthesis of which the pin is made in the form of a tube slit in the longitudinal direction in order to give it a transverse elasticity and means enabling the bone to regrow inside this pin. Said pin further comprises a crest or fin provided with openings.

Abstract: A femoral pin for a hip prosthesis, wherein the pin is in the form of a plurality of funicular elements, or strands, issuing from a hilt member. The strands have graduated lengths, are grouped according to their lengths and have their ends opposite the hilt member connected together. The longest strands form the outer contour of the pin member and the shorter strands are within this tapered contour.