alexa Six-year results of hydroxyapatite-coated total hip replacement.
Orthopaedics

Orthopaedics

Journal of Arthritis

Author(s): Geesink RG, Hoefnagels NH

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Abstract We present the 5.6- to 7.6-year results of our first 118 hydroxyapatite (HA)-coated total hip replacements in patients under 66 years of age. The titanium femoral component has proximal HA coating and was usually articulated with an HA-coated threaded cup. The HA coating of 50 microns thickness has a porosity of below 3\%, 97\% HA purity and 65\% crystallinity. The survival rate at a mean of six years was 100\% for the HA-coated stems and 99\% for the HA-threaded cups. The average Harris hip score at one year was 96, and at three years and thereafter 98. There was a very low incidence of early pain after surgery. Serial radiographs showed rapid bony integration of implants with evidence of bone apposition on the coating within six months. By Engh's criteria, all the femoral components had confirmed bone ongrowth after three years. We found no deterioration of results with time, and consider that our clinical and radiological results show that HA coatings can provide early pain relief and durable implant fixation.
This article was published in J Bone Joint Surg Br and referenced in Journal of Arthritis

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