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J Bone Joint Surg Br. 2007 Jan;89(1):34-8.

Hydroxyapatite-coated total knee replacement: clinical experience at 10 to 15 years.

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Orthopaedic Research & Imaging Centre in Arthroplasty, Bruay-Labuissiere, France.


This study describes 146 primary total knee replacements, either fully or partially coated with hydroxyapatite of which 74 knees in 68 patients were available for clinical and radiological assessment at a mean of 11.2 years (10 to 15). The global failure rate was 1.37% and survival rate with mechanical failure as the end-point was 98.14%. Radiological assessment indicated intimate contact between bone and the hydroxyapatite coating. Over time the hydroxyapatite coating appears to encourage filling of interface gaps remaining after surgery. Our results compare favourably with those of series describing cemented or porous-coated knee replacements, and suggest that fixation with hydroxyapatite is a reliable option in primary total knee replacement.

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