Advertisement

Dislocation rate after hip arthroplasty within the first postoperative year: 36mm versus 28mm femoral heads

Dislocation rate after hip arthroplasty within the first postoperative year: 36mm versus 28mm femoral heads

Hip Int 2011; 21(5): 559 - 564

Article Type: ORIGINAL ARTICLE

DOI:10.5301/HIP.2011.8647

Authors

Alessandro Bistolfi, Maurizio Crova, Federica Rosso, Paolo Titolo, Stefano Ventura, Giuseppe Massazza

Abstract

Abstract: Dislocation is a common and important complication of total hip arthroplasty (THA). Larger femoral heads may reduce the risk of dislocation and improve the range of movement. The aim of this study was to compare the relative risk (RR) of dislocation during the first year after THA between implants with 28mm and 36mm femoral heads. 198 consecutive hips with 28mm femoral head (Group-28) and 259 hips with 36mm femoral head (Group-36) were studied. The patients were assessed preoperatively and periodically using the Harris hip score (HHS) and radiographic analysis. The relative risk (RR) of dislocation was calculated. The average HHS significantly improved from a preoperative baseline to the last follow-up at 82.1 months (28mm) and 44.3 months (36mm). No statistically significant differences were revealed between the two groups for HHS results and complications (p>0.05), but the difference in RR of dislocation within the first year between the two groups was 7.85 (95%CI: 1.34-46.03), p=0.046.Although dislocation is multifactorial in etiology, the two groups were homogenous for all principal contributing factors except the diameter of the femoral head. Therefore, the use of 36-mm heads can reduce the risk of dislocation following THA by a factor of 8 compared to conventional 28mm heads.

Article History

This article is available as full text PDF.

  • If you are a Subscriber, please log in now.

  • Article price: Eur 36.00
  • You will be granted access to the article for 72 hours and you will be able to download any format (PDF or ePUB). The article will be available in your login area under "My PayPerView". You will need to register a new account (unless you already own an account with this journal), and you will be guided through our online shop. Online purchases are paid by Credit Card through PayPal.
  • If you are not a Subscriber you may:
  • Subscribe to this journal
  • Unlimited access to all our archives, 24 hour a day, every day of the week.

Authors

  • Bistolfi, Alessandro [PubMed] [Google Scholar]
    Department of Orthopaedics and Traumatology, CTO Hospital, Turin - Italy
  • Crova, Maurizio [PubMed] [Google Scholar]
    Department of Orthopaedics and Traumatology, CTO Hospital, Turin - Italy and Department of Orthopaedics and Traumatology, University of Turin, Turin - Italy
  • Rosso, Federica [PubMed] [Google Scholar]
    Department of Orthopaedics and Traumatology, University of Turin, Turin - Italy
  • Titolo, Paolo [PubMed] [Google Scholar]
    Department of Orthopaedics and Traumatology, CTO Hospital, Turin - Italy
  • Ventura, Stefano [PubMed] [Google Scholar]
    Department of Orthopaedics and Traumatology, University of Turin, Turin - Italy
  • Massazza, Giuseppe [PubMed] [Google Scholar]
    Department of Orthopaedics and Traumatology, CTO Hospital, Turin - Italy and Department of Orthopaedics and Traumatology, University of Turin, Turin - Italy

Article usage statistics

The blue line displays unique views in the time frame indicated.
The yellow line displays unique downloads.
Views and downloads are counted only once per session.

No supplementary material is available for this article.