US Patent 8070821 Hybrid femoral implant

A hybrid prosthetic femoral component has an outer bearing surface for engaging a tibial bearing and an inner surface for engaging a prepared distal femur. The inner surface having a distal surface, an anterior surface and a posterior surface, wherein said posterior surface has a first surface structure for allowing tissue ingrowth and the anterior and distal surfaces having a second surface structure for contacting bone cement. The first and second structure have different surface characteristics with different properties wherein the first surface structure is a porous surface and the second surface is a non-porous textured surface. The hybrid prosthetic femoral component further comprises an anterior chamfered surface and a posterior chamfered surface wherein the posterior chamfered surface includes the first surface structure and the anterior chamfered surface includes the second surface structure.