Textured surfaces for orthopedic implants

[0019] Aspects of the present invention are directed to bearing surfaces having increased war resistance. Generally, certain aspects of the present invention are directed to an implant design based on concepts of unidirectional load application and the use of engineered surfaces to increase the amount of synovial fluid at the bearing surface, to thereby reduce wear in the implant. Surfaces of certain implant embodiments are fabricated to maximize lubricant retention, encourage lubricant entrainment, and restrict lubricant escape from the bearing surface. Preferably, such bearing surfaces are optimized based on the unique characteristics of human biomechanical loading.

[0020] More specifically, aspects of the present invention are directed to the design of reciprocating or articulating surfaces of an orthopedic implant to optimize lubricant retention and wear resistance of such surfaces, even during, for example, unsteady and repetitious loading. Most orthopedic implants (hips, knees, sp