The reliability of the anterior pelvic plane for computer navigated acetabular component placement during total hip arthroplasty: prospective study with the EOS imaging system.
Fiche publication
Date publication
octobre 2014
Auteurs
Membres identifiés du Cancéropôle Est :
Pr MAINARD Didier
Tous les auteurs :
Barbier O, Skalli W, Mainard L, Mainard D
Lien Pubmed
Résumé
INTRODUCTION: Computer navigated total hip arthroplasty is mostly based on the use of the anterior pelvic plane (APP) as a reference. EOS is a new imaging system that provides three-dimensional analysis of the pelvis in a functional position with a low dose of radiation. The aim of this study was to evaluate the reliability of the APP for placement of the cup during computer navigated THA using EOS. HYPOTHESIS: The reliability of the APP is limited for the placement of the acetabular cup during computer navigated THA. MATERIALS AND METHODS: This was a prospective monocentric study using the EOS imaging system evaluating 44 patients in the standing position three months after computer navigated THA (Orthopilot). Reproducibility of EOS measurements were analyzed using SterEOS software and the reliability of the navigation data for the position of the cup were assessed. RESULTS: Intra and interobserver reproducibility of the measurements of the orientation of the cup by EOS were good with correlation coefficients above 93% and 95% and confidence intervals of less than +/-5 degrees . Mean cup inclination and anteversion were 41.3 degrees and 20.9 degrees and 44.3 degrees and 29.5 degrees respectively in operatively and post-operatively. The differences between measurements of operative cup inclination using computer assisted navigation and the post-operative EOS measurements were significant (P
Référence
Orthop Traumatol Surg Res. 2014 Oct;100(6 Suppl):S287-91