More than 200,000 total hip replacement (THR) surgeries are performed in the United States each year. THR surgery is needed when the articular cartilage cushioning of the joint deteriorates, causing pain and disability. Over time, polyethylene wear particles absorb into the tissue around the prosthetic joint, which may cause inflammation, mechanical instability, or dislocation of the prosthetic joint components. As a result, patients seek revision THR surgery or live in discomfort.
A new microtexturing technology places microscale texture features or “dimples” on the CoCrMo bearing surface of the prosthetic joint. The microtexture features form microhydrodynamic bearings that reduce friction and polyethylene wear.