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Related Experiment Video

Updated: Jun 20, 2026

The Transition to an Anterior-Based Muscle Sparing Approach Improves Early Postoperative Function but is Associated with a Learning Curve
09:51

The Transition to an Anterior-Based Muscle Sparing Approach Improves Early Postoperative Function but is Associated with a Learning Curve

Published on: September 7, 2022

Total hip arthroplasty in acetabular protrusio.

Michael D Ries1

  • 1University of California-San Francisco, 500 Parnassus Avenue, San Francisco, CA 94143, USA.

Orthopedics
|September 16, 2009
PubMed
Summary

Total hip arthroplasty (THA) effectively reconstructs acetabular protrusio defects using cementless components and bone grafting. Reconstruction cages offer an alternative for inadequate acetabular rim support, ensuring favorable outcomes.

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Area of Science:

  • Orthopedic Surgery
  • Biomedical Engineering

Background:

  • Protrusio acetabuli involves a central acetabular defect with medial femoral head migration.
  • This condition can arise from metabolic or mechanical bone issues affecting the periacetabular region.

Purpose of the Study:

  • To outline surgical reconstruction strategies for acetabular protrusio during total hip arthroplasty (THA).
  • To evaluate treatment options based on acetabular rim integrity and bone quality.

Main Methods:

  • Utilizing cementless, porous-coated acetabular components lateralized on the intact acetabular rim.
  • Employing morsellized autograft to fill the central cavitary defect.
  • Considering reconstruction cages for cases with inadequate rim support due to bone loss or osteoporosis.

Main Results:

  • Cementless components on a supported rim with grafting demonstrate favorable outcomes.
  • Reconstruction cages provide necessary pelvic fixation when rim support is compromised.
  • Preoperative templating is crucial for managing offset and leg length discrepancies.

Conclusions:

  • THA for acetabular protrusio can achieve success rates comparable to conventional THA.
  • Surgical approach selection depends on the mechanical integrity of the acetabular rim.
  • Bone grafting and appropriate implant choice are key to successful reconstruction.

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Last Updated: Jun 20, 2026

The Transition to an Anterior-Based Muscle Sparing Approach Improves Early Postoperative Function but is Associated with a Learning Curve
09:51

The Transition to an Anterior-Based Muscle Sparing Approach Improves Early Postoperative Function but is Associated with a Learning Curve

Published on: September 7, 2022