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Updated: Feb 2, 2026
09:31
Individualized Stem-positioning in Calcar-guided Short-stem Total Hip Arthroplasty
Published on: February 27, 2018
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Changes In Pelvic Orientation After Total Hip Arthroplasty : A Prospective Study With EOS™
Acta Orthopaedica Belgica
|November 15, 2018
Summary
Total hip arthroplasty (THA) can alter pelvic orientation, potentially affecting implant stability. This study used EOS™ imaging to assess changes in pelvic parameters after THA, finding significant modifications in some patients.
Area of Science:
- Orthopedic surgery
- Biomedical imaging
- Biomechanics
Background:
- Pelvic orientation changes post-total hip arthroplasty (THA) may impact femoral stem and acetabular component alignment.
- These alterations can lead to complications such as dislocation and implant degeneration.
- EOS™ technology offers low-radiation, 3D pelvic analysis in functional positions.
Purpose of the Study:
- To evaluate changes in pelvic orientation after THA in a standing position using EOS™ imaging.
- To analyze the impact of THA on key pelvic parameters.
Main Methods:
- A prospective study involving 40 patients undergoing computer-assisted THA for primary hip osteoarthritis.
- EOS™ imaging was performed preoperatively and 3 months postoperatively.
- Differences in pelvic incidence, sacral slope, and pelvic version were analyzed.
Main Results:
- Significant changes (>5°) in pelvic parameters were observed.
- Pelvic incidence changed in 12.5% of cases.
- Sacral slope changed in 35% of cases, and pelvic version in 22.5% of cases.
Conclusions:
- Total hip arthroplasty can lead to modifications in pelvic parameters.
- Understanding these changes is crucial for optimizing THA outcomes and minimizing complications.
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