論文

査読有り 国際誌
2017年9月19日

Chronological changes in functional cup position at 10 years after total hip arthroplasty.

Hip international : the journal of clinical and experimental research on hip pathology and therapy
  • Yusuke Okanoue
  • ,
  • Masahiko Ikeuchi
  • ,
  • Shogo Takaya
  • ,
  • Masashi Izumi
  • ,
  • Koji Aso
  • ,
  • Teruhiko Kawakami

27
5
開始ページ
477
終了ページ
482
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.5301/hipint.5000487
出版者・発行元
WICHTIG PUBLISHING

PURPOSE: This study aims to clarify the chronological changes in functional cup position at a minimum follow-up of 10 years after total hip arthroplasty (THA), and to identify the risk factors influencing a significant difference in functional cup position during the postoperative follow-up period. METHODS: We evaluated the chronological changes in functional cup position at a minimum follow-up of 10 years after THA in 58 patients with unilateral hip osteoarthritis. Radiographic cup position was measured on anteroposterior pelvic radiographs with the patient in the supine position, whereas functional cup position was recorded in the standing position. Radiographs were obtained before, 3 weeks after, and every 1 year after surgery. RESULTS: Functional cup anteversion (F-Ant) increased over time, and was found to have significantly increased at final follow-up compared to that at 3 weeks after surgery (p<0.01). The maximum postoperative change in F-Ant was 17.0° anteriorly; 12 cases (21%) showed a postoperative change in F-Ant by >10° anteriorly. Preoperative posterior pelvic tilt in the standing position and vertebral fractures after THA were significant predictors of increasing functional cup anteversion. CONCLUSIONS: Although chronological changes in functional cup position do occur after THA, their magnitude is relatively low. However, posterior impingement is likely to occur, which may cause edge loading, wear of the polyethylene liner, and anterior dislocation of the hip. We believe that, for the combined anteversion technique, the safe zone should probably be 5°-10° narrower in patients predicted to show considerable changes in functional cup position compared with standard cases.

リンク情報
DOI
https://doi.org/10.5301/hipint.5000487
PubMed
https://www.ncbi.nlm.nih.gov/pubmed/28218372
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000411868200011&DestApp=WOS_CPL
ID情報
  • DOI : 10.5301/hipint.5000487
  • ISSN : 1120-7000
  • eISSN : 1724-6067
  • PubMed ID : 28218372
  • Web of Science ID : WOS:000411868200011

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