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Leg length equalization during total hip replacement.

S T Woolson1

  • 1Palo Alto Medical Clinic, CA 94301.

Orthopedics
|January 1, 1990
PubMed
Summary
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This study introduces a novel method for equalizing leg lengths during total hip replacement surgery. The technique achieved an average postoperative leg length discrepancy of only 2.8 mm in 84 patients.

Area of Science:

  • Orthopedic Surgery
  • Biomedical Engineering

Background:

  • Leg length discrepancy is a common complication following total hip replacement.
  • Accurate equalization of leg lengths is crucial for patient outcomes and function.

Purpose of the Study:

  • To present and evaluate a new method for equalizing leg lengths during primary total hip replacement.
  • To assess the accuracy and effectiveness of this equalization technique.

Main Methods:

  • The method involves equalizing the vertical dimensions of resected bone and cartilage with implanted prostheses.
  • Preoperative templating and a specific arithmetic formula determined the femoral neck osteotomy level.
  • Measurements were taken from the femoral head to the medial femoral neck calcar.

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Main Results:

  • The average postoperative leg length discrepancy in 84 patients was 2.8 mm.
  • 89% of patients had a discrepancy of 6 mm or less.
  • Only 4% of patients experienced a leg length difference greater than 13 mm.

Conclusions:

  • This method provides accurate leg length equalization during total hip replacement.
  • The technique demonstrates a high success rate with minimal postoperative discrepancies.