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Radiographic parameters improve lower extremity prosthetic alignment.

Ryan Mooney1, Patrick Carry2, Erin Wylie2

  • 1Department of Orthopaedic Surgery, Children's Hospital Colorado, 13123 East 16th Ave, B060, Aurora, CO 80045 USA ; The University of Colorado, Anschutz Medical Campus, Aurora, CO USA.

Journal of Children'S Orthopaedics
|January 17, 2014
PubMed
Summary
This summary is machine-generated.

Standing long leg radiographs (LLR) significantly improve lower extremity prosthetic alignment and length. This objective method enhances prosthetic fitting, increasing the probability of a satisfactory fit for amputee patients.

Keywords:
AmputeesLong leg radiographsLower extremityProsthetic alignment

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Area of Science:

  • Orthopedics
  • Prosthetics and Orthotics
  • Radiography

Background:

  • Prosthetic fitting aims to restore patient comfort and functionality.
  • Objective assessment of lower extremity prosthesis alignment is crucial for optimal outcomes.
  • Current fitting methods may lack objective measures for precise adjustments.

Purpose of the Study:

  • To evaluate the effectiveness of standing anterior-posterior long leg radiographs (LLR) in guiding lower extremity prosthetic adjustments.
  • To compare prosthetic alignment and length before and after radiography-guided interventions.
  • To determine if LLR improves the rate of satisfactory prosthetic fit.

Main Methods:

  • Retrospective study at a multidisciplinary amputee clinic.
  • Inclusion of patients with congenital and/or acquired limb deficiencies.
  • Evaluation and adjustment of prosthetic alignment using LLR, with satisfactory alignment defined as ≤1° mechanical axis angular deviation and ≤10 mm leg length discrepancy.

Main Results:

  • Initial satisfactory prosthetic fit probability was 20.0%.
  • Probability of satisfactory fit improved to 53.3% after baseline adjustment and 76.7% after four adjustments.
  • Significant improvements observed in distal offset distance (average decrease of 10.7 mm) and leg length discrepancy (average decrease of 3.0 mm).

Conclusions:

  • Incorporating LLR into prosthetic fitting significantly enhances alignment and length.
  • Radiography-guided adjustments lead to a higher probability of achieving a satisfactory prosthetic fit.
  • LLR provides an objective and effective tool for optimizing lower extremity prosthesis fitting.