Takada Ryohei, Jinno Tetsuya, Miyatake Kazumasa, Yamauchi Yuki, Koga Daisuke, Yagishita Kazuyoshi, Okawa Atsushi
Department of Orthopaedic Surgery, Medical Hospital, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8519, Japan.
Eur J Orthop Surg Traumatol. 2018 May;28(4):621-625. doi: 10.1007/s00590-017-2115-5. Epub 2018 Jan 3.
The purpose of this study is to clarify morphological changes of acetabular subchondral bone cyst after total hip arthroplasty for osteoarthritis secondary to developmental dysplasia of the hip.
Two hundred and sixty-one primary cementless total hip arthroplasties of 208 patients, 18 males, 190 females, were retrospectively reviewed. Morphological changes of subchondral bone cyst were evaluated by computed tomography (CT). The mean cross-sectional area of the cyst from CT scans at 3 months postoperatively and after 7-10 years (average 8.4 years) were compared.
Acetabular subchondral bone cysts were found in 49.0% of all cases in preoperative CT scans. There was no cyst which was newly recognized in CT scan performed after postoperative 7-10 years. All the cross-sectional areas of the cysts evaluated in this study were reduced postoperatively.
This study revealed that acetabular subchondral bone cysts do not increase or expand after total hip arthroplasty and indicated that the longitudinal morphological change of acetabular bone cysts in patients of developmental dysplasia of the hip do not influence long-term implant fixation in total hip arthroplasty.
本研究旨在阐明髋关节发育不良继发骨关节炎行全髋关节置换术后髋臼软骨下骨囊肿的形态学变化。
回顾性分析208例患者（18例男性，190例女性）的261例初次非骨水泥型全髋关节置换术。通过计算机断层扫描（CT）评估软骨下骨囊肿的形态学变化。比较术后3个月及7 - 10年（平均8.4年）CT扫描囊肿的平均横截面积。
术前CT扫描中，49.0%的病例发现髋臼软骨下骨囊肿。术后7 - 10年CT扫描未发现新的囊肿。本研究评估的所有囊肿横截面积术后均减小。
本研究表明，全髋关节置换术后髋臼软骨下骨囊肿不会增大或扩展，提示髋关节发育不良患者髋臼骨囊肿的纵向形态变化不影响全髋关节置换术的长期植入物固定。
