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Individualized Stem-positioning in Calcar-guided Short-stem Total Hip Arthroplasty
Published on: February 27, 2018
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A simple angle-measuring instrument for measuring cemented stem anteversion during total hip arthroplasty.
Ryo Mitsutake1, Hiromasa Tanino2, Yasuhiro Nishida2
1Department of Orthopaedic Surgery, Asahikawa Medical University, Midorigaoka-Higashi 2-1-1-1, Asahikawa, 078-8510, Japan. mitutake@asahikawa-med.ac.jp.
BMC Musculoskeletal Disorders
|February 21, 2020
Summary
A new angle-measuring instrument accurately measures femoral stem anteversion during total hip arthroplasty (THA). This tool ensures precise cemented stem placement, improving surgical outcomes.
Area of Science:
- Orthopedic Surgery
- Biomedical Engineering
- Surgical Instrumentation
Background:
- Accurate femoral component placement is critical for total hip arthroplasty (THA) success.
- Intraoperative measurement accuracy directly impacts surgical outcomes.
- Novel instrumentation is continually sought to enhance surgical precision.
Purpose of the Study:
- To assess the accuracy of intraoperative measurements of cemented stem anteversion using a new angle-measuring instrument.
- To evaluate the accuracy of cemented stem positioning during THA with this instrument.
Main Methods:
- Compared intraoperative anteversion measurements (angle-measuring instrument) with postoperative CT scans in 149 hips.
- Assessed implantation accuracy by comparing target angles with postoperative anteversion in 105 hips.
Main Results:
- Mean measurement accuracy was 0.9° ± 6.1° (absolute 4.9° ± 3.7°), with a strong correlation (r=0.824, p<0.001).
- Mean implantation accuracy was 1.4° ± 5.6° (absolute 4.3° ± 3.6°), with a strong correlation (r=0.795, p<0.001).
Conclusions:
- The angle-measuring instrument provides accurate intraoperative measurements of stem anteversion.
- Cemented stem implantation during THA is accurate when using this novel angle-measuring instrument.
