The Stability of Acetabular Cup under Screw Fixation
نویسندگان
چکیده
INTRODUCTION The total hip replacement is a common surgical procedure in orthopaedics. However, the acetabular cup loosening is one of the major failure modes of cementless acetabular cup. Many researches point out that an unstable cup would induce a large micromotion under dynamic loading. This large micromotion would reduce the bone ongrowth on the cementless cup surface and prohibit the osseous integration [1, 2]. Besides the press fit fixation, the screw-fixation is a widely employed approach. However, how to achieve a better fixation effect with screw is still unclear. The objective of this study was to evaluate the effects of screw numbers and position on the initial stability of acetabular cup.
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