Simulated joint and muscle forces in reversed and anatomic shoulder prostheses.

Details

Serval ID
serval:BIB_421009A7551C
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Simulated joint and muscle forces in reversed and anatomic shoulder prostheses.
Journal
Journal of Bone and Joint Surgery. British volume
Author(s)
Terrier A., Reist A., Merlini F., Farron A.
ISSN
0301-620X
Publication state
Published
Issued date
2008
Peer-reviewed
Oui
Volume
90
Number
6
Pages
751-756
Language
english
Notes
Publication types: Journal Article ; Research Support, Non-U.S. Gov't
Abstract
Reversed shoulder prostheses are increasingly being used for the treatment of glenohumeral arthropathy associated with a deficient rotator cuff. These non-anatomical implants attempt to balance the joint forces by means of a semi-constrained articular surface and a medialised centre of rotation. A finite element model was used to compare a reversed prosthesis with an anatomical implant. Active abduction was simulated from 0 degrees to 150 degrees of elevation. With the anatomical prosthesis, the joint force almost reached the equivalence of body weight. The joint force was half this for the reversed prosthesis. The direction of force was much more vertically aligned for the reverse prosthesis, in the first 90 degrees of abduction. With the reversed prosthesis, abduction was possible without rotator cuff muscles and required 20% less deltoid force to achieve it. This force analysis confirms the potential mechanical advantage of reversed prostheses when rotator cuff muscles are deficient.
Keywords
Biomechanics, Electromyography, Finite Element Analysis, Humans, Joint Prosthesis, Models, Biological, Muscle, Skeletal, Prosthesis Design, Range of Motion, Articular, Rotator Cuff, Shoulder Joint
Pubmed
Web of science
Open Access
Yes
Create date
05/03/2009 14:41
Last modification date
20/08/2019 13:43
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