Risks of loosening of a prosthetic glenoid implanted in retroversion

Details

Serval ID
serval:BIB_A8A0ABB7F9E0
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Risks of loosening of a prosthetic glenoid implanted in retroversion
Journal
Journal of Shoulder and Elbow Surgery
Author(s)
Farron  A., Terrier  A., Buchler  P.
ISSN
1058-2746 (Print)
Publication state
Published
Issued date
08/2006
Volume
15
Number
4
Pages
521-6
Notes
Journal Article --- Old month value: Jul-Aug
Abstract
Osteoarthritis of the shoulder is frequently associated with posterior glenoid wear, which may be difficult to correct during shoulder arthroplasty. This study was designed to evaluate the risks that a prosthetic glenoid implanted in retroversion will loosen. The scapula, the humerus, the rotator cuff, and a total shoulder prosthesis were reconstructed with a 3-dimensional finite element model. The glenoid was placed in 5 different angles of retroversion (0 degrees , 5 degrees , 10 degrees , 15 degrees , and 20 degrees ). Location of the glenohumeral contact point, articular pressure, bone and cement stress, and micromotion around the glenoid implant were calculated during internal and external rotation. Glenoid retroversion induced a posterior displacement of the glenohumeral contact point during internal and external rotation, inducing a significant increase of stress within the cement mantel (+326%) and within the glenoid bone (+162%). Furthermore, a major increase of micromotion was measured at the bone-cement interface (+706%). According to this study, glenoid retroversion exceeding 10 degrees should be corrected during total shoulder arthroplasty. If the correction is impossible, not replacing the glenoid should be considered.
Keywords
Arthroplasty, Replacement/*methods Biomechanics Cadaver Finite Element Analysis Humans *Joint Prosthesis *Prosthesis Failure Risk Assessment Shoulder Joint/*surgery Stress, Mechanical
Pubmed
Web of science
Create date
28/01/2008 13:15
Last modification date
20/08/2019 16:13
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