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  4. Impact of individual anatomy on the benefit of cup medialisation in total hip arthroplasty
 
research article

Impact of individual anatomy on the benefit of cup medialisation in total hip arthroplasty

Terrier, Alexandre  
•
Parvex, Valerie
•
Rudiger, Hannes A.
2016
Hip International

Introduction: In total hip arthroplasty, cup medialisation with compensatory increase of femoral offset has been proposed to increase the moment arms of abductor muscles. However, this technique is associated with a loss of acetabular bone stock. Previous data indicates that the potential benefit is not constant among patients and is likely related to patient anatomy. Method: Therefore, to be able to select patients who would benefit most from this technique, we measured several anatomical parameters of the pelvis and femur in 15 patients; and evaluated correlations between them and the changes of moment arms associated with cup medialisation. The anatomical measurements were performed on 3-D reconstructions of preoperative CT scans. The moment arms of the gluteus medius and gluteus minimus were calculated for an abduction and flexion movement using patient-specific finite element models. Results: 6 anatomical parameters were correlated with muscle moment arm variations after cup medialisation. This effect was not systematic for either muscles or movements. Among all parameters, femoral anteversion was the most important parameter in explaining the effect of cup medialisation. Discussion: Patients with small femoral anteversion or low-riding greater trochanter benefit more from cup medialisation in terms of moment arm increase in abduction motion.

  • Details
  • Metrics
Type
research article
DOI
10.5301/hipint.5000392
Web of Science ID

WOS:000388504400008

Author(s)
Terrier, Alexandre  
Parvex, Valerie
Rudiger, Hannes A.
Date Issued

2016

Publisher

Wichtig Publishing

Published in
Hip International
Volume

26

Issue

6

Start page

537

End page

542

Subjects

Anatomy

•

Arthroplasty

•

Hip

•

Moment arm

•

Muscle

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LBO  
Available on Infoscience
January 24, 2017
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/133691
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