J Bone Joint Surg Br. 1992 May;74(3):452-6.

Hydroxyapatite coating on carbon composite hip implants in dogs.

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

Source

Toronto East General and Orthopaedic Hospital, Ontario, Canada.

Abstract

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.

PMID:: 1587901; [PubMed - indexed for MEDLINE]

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