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Related Experiment Videos

Dislocation after total hip arthroplasty.

L Yuan1, C Shih

  • 1Department of Orthopaedic Surgery, Chang Gung Memorial Hospital, No. 5, Fu-Hsing St. 333, Kweishan, Taoyan, Taiwan.

Archives of Orthopaedic and Trauma Surgery
|August 14, 1999
PubMed
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Hip dislocation after total hip arthroplasty (THA) is common, often occurring within 3 months. Smaller femoral heads and posterior approaches are risk factors, while closed reduction is the primary treatment.

Area of Science:

  • Orthopedics
  • Surgical Complications
  • Arthroplasty Research

Background:

  • Hip dislocation is a significant complication following total hip arthroplasty (THA).
  • Understanding risk factors and effective management is crucial for improving patient outcomes.

Purpose of the Study:

  • To analyze the incidence, risk factors, and treatment outcomes of hip dislocation after THA.
  • To identify predictors for recurrent dislocations and guide surgical and non-surgical management.

Main Methods:

  • Retrospective analysis of 2728 total hip arthroplasties (THAs) performed between 1980 and 1994.
  • Evaluation of 97 dislocation cases, with 62 followed for at least 2 years.
  • Correlation of dislocation rates with patient demographics, surgical approach, prosthesis type, femoral head size, and timing of dislocation.

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Main Results:

  • The overall dislocation rate was 3.6%, with 60% of cases being recurrent.
  • Dislocations were associated with smaller femoral head sizes and occurred in 58% within 3 months post-surgery.
  • Recurrent dislocations linked to smaller femoral heads, late onset, soft-tissue imbalance, and cup malposition.
  • Closed reduction success rate was 41% on the first attempt; re-operation was needed in 15%.

Conclusions:

  • Smaller femoral head size and posterior approach (for heads ≤ 26 mm) increase THA dislocation risk.
  • Closed reduction is the initial treatment, with specific bracing and training protocols for recurrent dislocations.
  • Most dislocations can be managed non-operatively, emphasizing patient education and muscle training.