Glenoid bone strain after anatomical total shoulder arthroplasty: In vitro measurements with micro-CT and digital volume correlation.

Details

Serval ID
serval:BIB_FE9B15445536
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Glenoid bone strain after anatomical total shoulder arthroplasty: In vitro measurements with micro-CT and digital volume correlation.
Journal
Medical engineering & physics
Author(s)
Boulanaache Y., Becce F., Farron A., Pioletti D.P., Terrier A.
ISSN
1873-4030 (Electronic)
ISSN-L
1350-4533
Publication state
Published
Issued date
11/2020
Peer-reviewed
Oui
Volume
85
Pages
48-54
Language
english
Notes
Publication types: Journal Article
Publication Status: ppublish
Abstract
Glenoid implant loosening remains a major source of failure and concern after anatomical total shoulder arthroplasty (aTSA). It is assumed to be associated with eccentric loading and excessive bone strain, but direct measurement of bone strain after aTSA is not available yet. Therefore, our objective was to develop an in vitro technique for measuring bone strain around a loaded glenoid implant. A custom loading device (1500 N) was designed to fit within a micro-CT scanner, to use digital volume correlation for measuring displacement and calculating strain. Errors were evaluated with three pairs of unloaded scans. The average displacement random error of three pairs of unloaded scans was 6.1 µm. Corresponding systematic and random errors of strain components were less than 806.0 µε and 2039.9 µε, respectively. The average strain accuracy (MAER) and precision (SDER) were 694.3 µε and 440.3 µε, respectively. The loaded minimum principal strain (8738.9 µε) was 12.6 times higher than the MAER (694.3 µε) on average, and was above the MAER for most of the glenoid bone volume (98.1%). Therefore, this technique proves to be accurate and precise enough to eventually compare glenoid implant designs, fixation techniques, or to validate numerical models of specimens under similar loading.
Keywords
Bone strain, Digital volume correlation, Glenoid, Micro-CT, Total shoulder arthroplasty
Pubmed
Web of science
Create date
10/11/2020 9:42
Last modification date
13/11/2020 7:26
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