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Journal of Bone and Joint Surgery - British Volume, Vol 74-B, Issue 3, 452-456
Copyright © 1992 by British Editorial Society of Bone and Joint Surgery

Articles

Hydroxyapatite coating on carbon composite hip implants in dogs

GL Maistrelli, N Mahomed, D Garbuz, V Fornasier, IJ Harrington, and A Binnington

Toronto East General and Orthopaedic Hospital, Ontario, Canada.

In 33 dogs we implanted femoral stems made either of carbon composite, some coated with hydroxyapatite, or of titanium alloy with a porous coating. Osseointegration was greater in the hydroxyapatite-coated than in the un-coated stems (p less than 0.001). Push-out tests, at an average of 7.2 months after implantation, showed a six-fold increase in interface shear strength and a twelve-fold increase in shear stiffness in the hydroxyapatite-coated group compared with noncoated implants. The highest shear-strength values were found in the porous-coated titanium alloy stems, around which there was also the most resorptive bone remodelling.




(c) British Editorial Society of Bone and Joint Surgery All Rights Reserved
Registered charity no: 209299     Print ISSN: 0301-620X
Hip, Knee, Trauma, Upper limb, Foot & Ankle, Paediatrics, Oncology, Spine, Arthroplasty, General