Abstract
We measured intraosseous pressures in twenty human hips from cadavera during progressive serial applications of load using a materials-testing machine. Pressure rose in strict proportion to load at each of four different testing sites. In the femoral head, the mean response to loads applied over 0.1 second was 55 +/- 66 millimeters of mercury per 980 newtons. This value was 3.6 times higher than the mean response in a region cephalad to the acetabulum and 2.6 and 2.8 times higher than the mean response in the femoral neck and intertrochanteric regions. In further studies within the femoral head, pressures were accentuated and reduced by factors of 1.7 and 0.4, respectively, at faster (0.03 second) and slower (1.0 second) loading times.
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