Abstract: Disclosed is an improved universal modular prosthetic stem extension which may be installed on a prosthesis in a multiplicity of differing orientations to allow adaptation to a multiplicity of differing patient conditions. The stem includes a coupling mechanism allowing the stem to be rotated to any one of a multiplicity of rotative positions with respect to a prosthetic base, whereupon the stem may be tightened and fixed in position at a desired such orientation. The inventive stem extension is disclosed in conjunction with embodiments of distal femoral, proximal tibial, and proximal femoral prostheses.

Abstract: A knee holder for holding a knee into selected positions for surgery includes a base plate for mounting on an operating table, the base plate including a plurality of connecting elements extending along the length of the base plate and a leg brace for strapping to the lower leg of a patient, with pins on the leg brace for engaging selective ones of the connecting elements on the base plate for adjusting the degree of bend in the leg for operation.