Abstract
The compressive and shear stiffness of periarticular osteophytes, hypertrophic femoral intercondylar notch and normal articular cartilage were compared by obtaining force-indentation curves and applying a shear force to the cartilage/bone interface. The primary stiffness (at 0–100N load) was similar for osteophytes (391N/mm), intercondylar notch (400N/mm) and normal articular cartilage (401N/mm). By contrast, the secondary stiffness (at 100–500N load) was much higher for the intercondylar notch (493N/mm) compared to the osteophytes (410N/mm). There were two varieties of osteophytes, "pink" and "white". Compared with "pink" osteophytes, "white" osteophytes exhibited features similar to a progressively hardening material and appear to be a more mechanically suitable material as an osteochondral graft for full thickness articular cartilage defect. The shear characteristics of all the samples were similar.
Published Version
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