Fixed and mobile-bearing total ankle prostheses: Effect on tibial bone strain.

Details

Serval ID
serval:BIB_CC32048FF032
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Fixed and mobile-bearing total ankle prostheses: Effect on tibial bone strain.
Journal
Clinical biomechanics
Author(s)
Terrier A., Fernandes C.S., Guillemin M., Crevoisier X.
ISSN
1879-1271 (Electronic)
ISSN-L
0268-0033
Publication state
Published
Issued date
10/2017
Peer-reviewed
Oui
Volume
48
Pages
57-62
Language
english
Notes
Publication types: Journal Article
Publication Status: ppublish
Abstract
Total ankle replacement is associated to a high revision rate. To improve implant survival, the potential advantage of prostheses with fixed bearing compared to mobile bearing is unclear. The objective of this study was to test the hypothesis that fixed and mobile bearing prostheses are associated with different biomechanical quantities typically associated to implant failure.
With a validated finite element model, we compared three cases: a prosthesis with a fixed bearing, a prosthesis with a mobile bearing in a centered position, and a prosthesis with mobile bearing in an eccentric position. Both prostheses were obtained from the same manufacturer. They were tested on seven tibias with maximum axial compression force during walking. We tested the hypothesis that there was a difference of bone strain, bone-implant interfacial stress, and bone support between the three cases. We also evaluated, for the three cases, the correlations between bone support, bone strain and bone-implant interfacial stress.
There were no statistically significant differences between the three cases. Overall, bone support was mainly trabecular, and less effective in the posterior side. Bone strain and bone-implant interfacial stress were strongly correlated to bone support.
Even if slight differences are observed between fixed and mobile bearing, it is not enough to put forward the superiority of one of these implants regarding their reaction to axial compression. When associated to the published clinical results, our study provides no argument to warn surgeons against the use of two-components fixed bearing implants.

Keywords
Ankle Joint/surgery, Arthroplasty, Replacement, Knee/methods, Biomechanical Phenomena, Finite Element Analysis, Humans, Joint Prosthesis, Knee Prosthesis, Prosthesis Design, Range of Motion, Articular/physiology, Tibia/physiology, Weight-Bearing/physiology, Ankle, Arthroplasty, Finite element method, Fixed bearing, Mobile bearing
Pubmed
Web of science
Create date
08/08/2017 11:28
Last modification date
20/08/2019 15:46
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