Biomechanical comparison of glenoid implants with adaptable and fixed backside curvatures in anatomic total shoulder arthroplasty.

Détails

ID Serval
serval:BIB_BEE161C306F8
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Biomechanical comparison of glenoid implants with adaptable and fixed backside curvatures in anatomic total shoulder arthroplasty.
Périodique
Journal of shoulder and elbow surgery
Auteur(s)
Terrier A., Obrist R., Malfroy Camine V., Becce F., Farron A.
ISSN
1532-6500 (Electronic)
ISSN-L
1058-2746
Statut éditorial
Publié
Date de publication
09/2018
Peer-reviewed
Oui
Volume
27
Numéro
9
Pages
1656-1663
Langue
anglais
Notes
Publication types: Journal Article
Publication Status: ppublish
Résumé
We evaluated the biomechanical effects and potential advantages of glenoid implants with adaptable backside curvature radii and compared them with standard implants having fixed backside curvatures in anatomic total shoulder arthroplasty (aTSA) for primary glenohumeral osteoarthritis with uniconcave glenoids.
A glenoid implant with adaptable backside curvatures (Aequalis PerFORM, Tornier SAS, Montbonnot, France) was compared with its previous model having a fixed curvature radius. Virtual aTSAs were performed in 24 patients from preoperative shoulder computed tomography data sets, using both implants in each patient. For all 48 simulated aTSAs, we first measured the glenoid bone reaming depth, subchondral bone quality after reaming, and implant backside surface and then the predicted cement stress, bone-cement interfacial stress, and bone strain at 60° of arm abduction. These biomechanical quantities were tested for differences between adaptable and fixed implants and for correlations between preoperative measurements and postoperative predictions.
Adaptable glenoid implants induced a significant decrease in cement stress (P = .008), bone-cement interfacial stress (P = .045), and bone strain (P = .039), particularly for glenoids with curvature radii larger than 40 mm. However, these biomechanical effects were not significantly correlated with an increase in subchondral glenoid bone quality.
Our study confirms the presumed biomechanical advantages of adaptable glenoid implants, even though the effects were not directly due to the adaptation of the backside curvature radius. Benefits were more pronounced for glenoids with large curvature radii. Our initial biomechanical findings should now be corroborated with large-scale clinical studies.
Mots-clé
Adult, Aged, Aged, 80 and over, Arthroplasty, Replacement, Shoulder/instrumentation, Arthroplasty, Replacement, Shoulder/methods, Bone Cements, Female, Humans, Male, Middle Aged, Osteoarthritis/surgery, Prosthesis Design, Scapula/surgery, Shoulder Joint, Shoulder Prosthesis, Tomography, X-Ray Computed, Anatomic total shoulder arthroplasty, aseptic loosening, bone mineral density, bone quality, computed tomography, glenoid implant
Pubmed
Web of science
Création de la notice
03/05/2018 17:46
Dernière modification de la notice
20/08/2019 16:33
Données d'usage