Clinical Orthopaedics and Related Research

, Volume 466, Issue 2, pp 294–299

Modified Posterior Approach to Total Hip Arthroplasty to Enhance Joint Stability

  • Yong Sik Kim
  • Soon Yong Kwon
  • Doo Hoon Sun
  • Suk Ku Han
  • William J. Maloney
International Hip Society Symposium

Abstract

We modified the posterior approach by preserving the external rotator muscles to enhance joint stability after primary THA. We asked whether this modified posterior approach would have a lower dislocation rate than the conventional posterior approach, with and without a repair of external rotator muscles. We retrospectively divided 557 patients (670 hips) who had undergone primary THA into three groups based on how the external rotator muscles had been treated during surgery: (1) not repaired after sectioning, (2) repaired after sectioning, or (3) not sectioned and preserved. The minimum followup was 1 year. In the group with preserved external rotator muscles, we observed no dislocations; in comparison, the dislocation rates for the repaired rotator group and the no-repair group were 3.9% and 5.3%, respectively. This modified posterior approach, which preserves the short external rotator muscles, seemed effective in preventing early dislocation after primary THA.

Level of Evidence: Level III, therapeutic study. See the Guidelines for Authors for a complete description of levels of evidence.

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Copyright information

© The Association of Bone and Joint Surgeons 2008

Authors and Affiliations

  • Yong Sik Kim
    • 1
  • Soon Yong Kwon
    • 2
  • Doo Hoon Sun
    • 3
  • Suk Ku Han
    • 4
  • William J. Maloney
    • 5
  1. 1.Department of Orthopaedic Surgery, Kang-Nam St. Mary’s HospitalThe Catholic University of KoreaSeoulKorea
  2. 2.Department of Orthopaedic Surgery, St. Mary’s HospitalThe Catholic University of KoreaSeoulKorea
  3. 3.Department of Orthopaedic SurgerySun HospitalDaejeonKorea
  4. 4.Department of Orthopaedic Surgery, St. Paul’s HospitalThe Catholic University of KoreaSeoulKorea
  5. 5.Department of Orthopaedic SurgeryStanford Hospital and ClinicsStanfordUSA

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