High incidence of early subtrochanteric lateral cortical atrophy after hip arthroplasty using bone-conserving short stem.-临床诊疗知识库

High incidence of early subtrochanteric lateral cortical atrophy after hip arthroplasty using bone-conserving short stem.

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作者：

Yoon Je, Cho；Chan Il, Bae；Wan Keun, Yoon；Young Soo, Chun；Kee Hyung, Rhyu

来源：

International orthopaedics 2017 年

标签：

Arthroplasty BMI Hip Short stem Stress shielding

Load transfer to the bone is believed to be more physiological around the short stem in total hip arthroplasty (THA). However, we found unusual bony remodeling around the shortened tapered stem. This study was performed to investigate the extent and frequency of this phenomenon and to find the possible risk factors of it.Among 121 consecutive THA using the same short stem, 80 THAs were enrolled. Radiographic measurements were made using anteroposterior (AP) radiographs taken immediately and at two years after surgery. The thickness of the lateral cortex at the level of the distal end of the coated surface and at 10, 20, 30, and 40 mm proximal to it were measured.Significant atrophy was noted in all regions (P < 0.001 each). In 46 cases, this presented as an intra-cortical osteolytic line (IOL). Sixty-one cases showed either an IOL or atrophy >10

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