Benefits of an anatomical reconstruction of the humeral head during shoulder arthroplasty: a finite element analysis.

Détails

ID Serval
serval:BIB_C5BCACF98427
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Benefits of an anatomical reconstruction of the humeral head during shoulder arthroplasty: a finite element analysis.
Périodique
Clinical Biomechanics
Auteur(s)
Büchler P., Farron A.
ISSN
0268-0033
Statut éditorial
Publié
Date de publication
01/2004
Peer-reviewed
Oui
Volume
19
Numéro
1
Pages
16-23
Langue
anglais
Résumé
OBJECTIVE: To study the influence of the shape of the prosthetic humeral head on shoulder biomechanics and then to evaluate the benefits of an anatomical reconstruction of the humeral head after shoulder arthroplasty. DESIGN: A 3D numerical model of a healthy shoulder was reconstructed. The model included the proximal humerus, the scapula and, for stability purposes, the subscapularis, infraspinatus and supraspinatus rotator cuff muscles. BACKGROUND: Shoulder prostheses used nowadays, called third generation, allow for a better adaptation of the implant to the anatomy of the proximal humerus than previously used implants. However, no biomechanical study has shown the benefits of this anatomical reconstruction of the humeral head. METHODS: The model was used to compare the biomechanics of a shoulder without implant with the biomechanics of the same shoulder after humeral hemiarthroplasty. Two humeral components were tested: a second-generation prosthesis and an implant with an anatomically reconstructed humeral head. RESULTS: The anatomical reconstruction of the humeral head restored the physiological motions and limited eccentric loading of the glenoid. Conversely, the second-generation implant produced contact forces in the superior extremity of the glenoid surface leading to bone stresses up to 8 times higher than for the intact shoulder. CONCLUSIONS: This analysis provided insights into the mechanical effects of different reconstructions of the humeral head and highlighted the advantages of anatomical reconstructions of the humeral head during shoulder arthroplasty.
Mots-clé
Arthroplasty, Replacement, Biomechanics, Finite Element Analysis, Humans, Humerus/surgery, Joint Prosthesis, Models, Anatomic, Prosthesis Failure, Reconstructive Surgical Procedures, Shoulder Joint/surgery
Pubmed
Web of science
Création de la notice
28/01/2008 13:15
Dernière modification de la notice
03/03/2018 21:16
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