日本関節病学会誌
Online ISSN : 1884-9067
Print ISSN : 1883-2873
ISSN-L : 1883-2873
症例報告
表面置換型人工股関節置換術後に骨性強直を認めた一例
古谷 一水牧田 浩行藤原 稔内野 洋介小林 大悟齋藤 知行
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2016 年 35 巻 2 号 p. 175-179

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 We report a case of a 33-year-old man with severe heterotopic ossification around the hip, ten months after a hip resurfacing arthroplasty. The patient had a history of a bone cyst which was treated with curettage and beta-tricalcium phosphate grafting on the right hip prior to index surgery. However, eight months postoperatively, avascular necrosis occurred affecting the right hip. The hip joint was exposed using a modified Hardinge approach. A Cormet Resurfacing Prosthesis (Corin, Cirencester, United Kingdom) was implanted. At three weeks after the index surgery, a small ossification occurred around the hip which was observed via a plain radiograph. Ten months postoperatively, the ossification had progressed and the hip joint developed complete ankylosis. However, the patient did not complain of any pain around the hip. Therefore, no further treatment was required. According to the literature, this is a rare case of severe heterotopic ossification that led to ankylosis of the hip joint.

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