Does difference in stem design affect accuracy of stem alignment in total hip arthroplasty with a CT-based navigation system?
Accuracy
CT-based navigation
Stem alignment
Stem design
Total hip arthroplasty
Journal
Journal of artificial organs : the official journal of the Japanese Society for Artificial Organs
ISSN: 1619-0904
Titre abrégé: J Artif Organs
Pays: Japan
ID NLM: 9815648
Informations de publication
Date de publication:
Mar 2021
Mar 2021
Historique:
received:
31
03
2020
accepted:
15
07
2020
pubmed:
28
7
2020
medline:
8
6
2021
entrez:
26
7
2020
Statut:
ppublish
Résumé
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.
Identifiants
pubmed: 32710390
doi: 10.1007/s10047-020-01196-7
pii: 10.1007/s10047-020-01196-7
doi:
Types de publication
Comparative Study
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
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