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The skeletal response to matt and polished cemented femoral stems

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We studied the effect of the surface finish of the stem on the transfer of load in the proximal femur in a sheep model of cemented hip arthroplasty. Strain-gauge analysis and corresponding finite-element (FE) analysis were performed to assess the effect of friction and creep at the cement-stem interface.

No difference was seen between the matt and polished stems. FE analysis showed that the effects of cement creep and friction at the stem-cement interface on femoral strain were small compared with the effect of inserting a cemented stem.

Correspondence should be sent to Dr D. S. Barker at the Department of Orthopaedics, Lund University Hospital, Lund 22185, Sweden.

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