A study of collared prostheses and proximal femoral dimensions.
Difficulty has been encounterd in placing traditional collared total hips so the stem is in a valgus position and the collar is covering the cut portion of the femoral neck. We reviewed the data of Oh and Harris, which was used in designing the HD2 device, and compared these with actual specimens of 21 cadavers and x-rays of 104 Kentucky patients who received total hips. We found that the sizes of hips in Kentucky patients were exactly the same as those on patients in Boston, Massachusetts. We feel that valgus is perhaps overemphasized, and a nonvarus is more appropriate with the collar on the cut portion of the femoral neck.
P J
PJ
Nicholls
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CA
Beard
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T
Jarecky