Titre
Computer-assisted cup placement techniques in total hip arthroplasty improve accuracy of placement.
Type
article
Institution
UNIL/CHUV/Unisanté + institutions partenaires
Périodique
Auteur(s)
Jolles, B.M.
Auteure/Auteur
Genoud, P.
Auteure/Auteur
Hoffmeyer, P.
Auteure/Auteur
Liens vers les personnes
Liens vers les unités
ISSN
0009-921X
Statut éditorial
Publié
Date de publication
2004
Numéro
426
Première page
174
Dernière page/numéro d’article
179
Peer-reviewed
Oui
Langue
anglais
Résumé
Malposition of the acetabular component during hip arthroplasty increases the occurrence of impingement, reduces range of motion, and increases the risk of dislocation and long-term wear. To prevent malpositioned hip implants, an increasing number of computer-assisted orthopaedic systems have been described, but their accuracy is not well established. The purpose of this study was to determine the reproducibility and accuracy of conventional versus computer-assisted techniques for positioning the acetabular component in total hip arthroplasty. Using a lateral approach, 150 cups were placed by 10 surgeons in 10 identical plastic pelvis models (freehand, with a mechanical guide, using computer assistance). Conditions for cup implantations were made to mimic the operating room situation. Preoperative planning was done from a computed tomography scan. The accuracy of cup abduction and anteversion was assessed with an electromagnetic system. Freehand placement revealed a mean accuracy of cup anteversion and abduction of 10 degrees and 3.5 degrees, respectively (maximum error, 35 degrees). With the cup positioner, these angles measured 8 degrees and 4 degrees (maximum error, 29.8 degrees), respectively, and using computer assistance, 1.5 degrees and 2.5 degrees degrees (maximum error, 8 degrees), respectively. Computer-assisted cup placement was an accurate and reproducible technique for total hip arthroplasty. It was more accurate than traditional methods of cup positioning.
PID Serval
serval:BIB_43C3FBF9DD29
PMID
Date de création
2008-01-28T11:19:33.692Z
Date de création dans IRIS
2025-05-20T16:30:48Z