Abstract: An acetabular cup for a total hip prosthesis has an outer shell and an inner bearing component. The shell is molded around the inner bearing component and has an elastic modulus similar to subchondral bone of between 5 GPa and 18 GPa. The shell has a part-spherical main portion and two independent arms projecting from the part-spherical main portion. The arms are separated from each other by an opening of predetermined shape and size.

Abstract: Fiber reinforced molding compounds wherein the resinous matrix is a thermosetting linear polymer characterized in constituting two oligomeric ethylenically unsaturated polyester segments joined through a polyurethane residue and having acryloyl or methacryloyl end groups.

Abstract: A prosthetic component (20; 30) for replacing a region of a bone including an articular surface (12) of a joint has a first surface shaped to approximate the articular surface, and a second surface (23; 33) shaped to extend substantially perpendicularly to the principal trabecular structure (10, 11) in a section through the bone when the first surface replaces the articular surface. In the case of a long bone the second surface is preferably shaped to approximate the fused epiphyseal plate scar (15) of the bone region in question. Also the component preferably has varying elastic modulus, at least in the portion thereof bordering the second surface, to simulate that of the bone replaced thereby.

Abstract: An endoprosthetic bone joint device is secured by filamentary elements driven therethrough into penetrating engagement with bone. These elements will normally exhibit transverse flexibility; they preferably have elastic modulus similar to bone; they can be roughened or barbed for added securement; they can carry material of negative electrochemical potential relative to other parts of the device to induce bone growth intimately therewith; and they can carry material otherwise beneficial to bone growth. The device preferably also has a radiating multi-directional flange formation to engage a corresponding formation cut in the bone.

Abstract: A thermosetting resinous composition characterized in constituting at least two oligomeric polyester segments terminally joined through a polyurethane residue and having end groups containing polymerizable unsaturation. Further disclosed are the thermoset products obtained by the addition polymerization of the aforesaid compositions in the presence or absence of a copolymerizable monomeric crosslinking agent. The resultant thermoset products are particularly useful in preparing molded articles.