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Variations in strength and structure of cancellous bone at the knee

1974; Elsevier BV; Volume: 7; Issue: 3 Linguagem: Inglês

10.1016/0021-9290(74)90010-4

1873-2380

Jonathan Behrens, P. S. Walker, Hiroto Shoji,

Orthopaedic implants and arthroplasty

Specimens of cancellous bone were obtained from normal autopsy and arthritic knees at operation. The bone was removed from the locations of the contact areas at 0°, 45° and 90° flexion. Compressive strength was measured and compared with the bulk specimen density, the linear absorption coefficient, μB, and the bone material density. In addition, the trabecular patterns themselves were studied. Strength varied with position in the joint so as to indicate load-bearing function. Bone material density did not relate to strength. Bulk specimen density and μB were found to correlate with strength, yet did not fully account for the wide strength variations. Trabecular organization however was shown to be a significant factor. It was concluded, therefore, that specimen strength was a function of several factors.