Martin Orthopaedic Biomechanics Laboratory, St. Michael's Hospital, University of Toronto, 30 Bond Street, Toronto, ON M5B 1W8, Canada.
J Bone Joint Surg Am. 2011 May;93 Suppl 2:122-7. doi: 10.2106/JBJS.J.01709.
The Birmingham Mid-Head Resection (BMHR) is a bone-conserving, short-stem alternative to hip resurfacing for patients with abnormal femoral head anatomy.
The current study examines whether a bone-preserving femoral component that is fixed into the femoral neck metaphysis provides a mechanical advantage in terms of resisting femoral neck fracture in comparison with a conventional hip resurfacing implant in a human cadaveric femoral model.
Femora with a BMHR femoral component failed at an average of 23% less load than those prepared with a conventional hip resurfacing component (mean and standard deviation, 5434 ± 2297 compared with 7012 ± 2619 N; p < 0.001).
An uncemented, metaphyseal fixed, bone-conserving femoral implant does not provide superior mechanical strength or increased resistance to femoral neck fracture in comparison with a conventional hip resurfacing arthroplasty.
伯明翰中头部切除术（BMHR）是一种保留骨量的短柄髋关节表面置换术，适用于股骨头解剖异常的患者。
本研究旨在探讨与传统髋关节表面置换植入物相比，固定在股骨颈干骺端的保留骨量的股骨部件在抵抗股骨颈骨折方面是否具有机械优势，该研究采用了人体尸体股骨模型。
采用 BMHR 股骨部件的股骨的平均失效负荷比采用传统髋关节表面置换部件的股骨低 23%（平均值和标准差，5434 ± 2297 与 7012 ± 2619 N；p < 0.001）。
与传统髋关节表面置换术相比，非骨水泥、干骺端固定、保留骨量的股骨植入物在机械强度或抵抗股骨颈骨折方面没有优势。
