ArticleJournal of artificial organs : the official journal of the Japanese Society for Artificial Organs2021
Does difference in stem design affect accuracy of stem alignment in total hip arthroplasty with a CT-based navigation system?
Article in Journal of artificial organs : the official journal of the Japanese Society for Artificial Organs, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
What it found
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Who cites it
4 citing papers in PubMed.
- Femoral stem alignment and post-operative patient satisfaction: a retrospective analysis of total hip arthroplasty using computer-assisted equipment for placing cups.International orthopaedics · 2026Article
- Article
- Evaluation of the reproducibility of preoperative three-dimensional computed tomography planning for posterolateral approach total hip arthroplasty.Journal of artificial organs : the official journal of the Japanese Society for Artificial Organs · 2024Article
- Analysis on association between sagittal stem alignment and early functional and radiological outcome following primary cementless total hip replacement.European journal of orthopaedic surgery & traumatology : orthopedie traumatologie · 2024Observational
Corrections and comments
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Authors and funding
4 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The efficacy of a computed tomography (CT)-based navigation system to accurately position the stem for intended alignment is unclear. In addition, the influence of stem design on the accuracy of insertion is unknown. We therefore retrospectively compared the accuracy and precision for the intended alignment of two different designs of femoral stem which were implanted with or without the navigation system. Forty-nine total hip arthroplasties (THAs) using a tapered wedge stem and 91 THAs using an anatomic stem were evaluated for the navigation group. Thirty-three THAs using the tapered wedge stem and 15 THAs using the anatomic stem were controls for the non-navigation group. Differences between postoperative measurement and preoperative planning were compared among the groups. In the navigation groups, accuracy (mean absolute difference) and precision (95% limits of agreement) of stem anteversion were 4.3° and ± 10.1° in the tapered wedge stem and 3.1° and ± 6.9° in the anatomic stem. In the non-navigation groups, these were 6.0° and ± 15.2° and 4.8° and ± 12.4°, respectively. The accuracy and precision in the navigation groups were significantly superior to those in the non-navigation group, and those in the anatomic stem group were significantly superior to those in the tapered wedge group. Using the CT-based navigation system, the accuracy and precision for intended stem anteversion were improved. When compared under guidance of navigation system, the accuracy and precision for intended stem anteversion in the anatomic stem were superior to those in the tapered wedge stem.
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Registered trials
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