Computer-assisted cup placement techniques in total hip arthroplasty improve accuracy of placement.

Details

Serval ID
serval:BIB_43C3FBF9DD29
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Computer-assisted cup placement techniques in total hip arthroplasty improve accuracy of placement.
Journal
Clinical Orthopaedics and Related Research
Author(s)
Jolles B.M., Genoud P., Hoffmeyer P.
ISSN
0009-921X
Publication state
Published
Issued date
2004
Peer-reviewed
Oui
Number
426
Pages
174-179
Language
english
Abstract
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.
Keywords
Arthroplasty, Replacement, Knee, Electromagnetic Phenomena, Humans, Models, Anatomic, Reproducibility of Results, Surgery, Computer-Assisted
Pubmed
Web of science
Create date
28/01/2008 12:19
Last modification date
20/08/2019 13:47
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