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Updated: May 23, 2026

Individualized Stem-positioning in Calcar-guided Short-stem Total Hip Arthroplasty
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Individualized Stem-positioning in Calcar-guided Short-stem Total Hip Arthroplasty

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[Dislocation after total hip arthroplasty].

C Perka1, F Haschke, S Tohtz

  • 1Centrum für Muskuloskeletale Chirurgie, Klinik für Orthopädie und Klinik für Unfall- und Wiederherstellungs-chirurgie, Charité, Berlin.

Zeitschrift Fur Orthopadie Und Unfallchirurgie
|April 14, 2012
PubMed
Summary
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Recurrent dislocations after total hip arthroplasty are a common issue, often requiring revision surgery. Proper implant positioning and patient-specific factors are crucial for preventing these hip instability events.

Area of Science:

  • Orthopedic Surgery
  • Biomedical Engineering

Context:

  • Dislocations are a frequent complication following total hip arthroplasty (THA).
  • Recurrent dislocations represent a significant indication for revision THA, accounting for up to 30% of such procedures.
  • The majority of dislocations (50%) occur within the first three months post-surgery, highlighting the importance of operative factors.

Purpose:

  • To analyze the risk factors, diagnostic methods, and therapeutic strategies for dislocations after total hip arthroplasty.
  • To introduce a classification system for hip dislocations to guide treatment planning.
  • To evaluate the effectiveness of various interventions in preventing recurrent dislocations.

Summary:

  • Diagnosis of dislocation typically involves computed tomography (CT) for component relationships and dynamic fluoroscopy for assessing translation and soft-tissue tension.

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Last Updated: May 23, 2026

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The Transition to an Anterior-Based Muscle Sparing Approach Improves Early Postoperative Function but is Associated with a Learning Curve
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  • A five-type classification system considers implant position, abductor muscle function, impingement, and component congruence to inform therapy.
  • Therapeutic approaches include optimizing implant positioning, utilizing larger femoral heads or tripolar sockets, soft tissue reconstruction, and postoperative immobilization.

    • Impact:

    • Improved understanding of dislocation mechanisms and risk factors can lead to refined surgical techniques.
    • The proposed classification system offers a structured approach to managing complex hip dislocation cases.
    • Optimized treatment strategies aim to reduce the high failure rates (up to one-third) associated with managing hip dislocations after THA.