The arm change position: Additional information for optimizing range of motion after reverse shoulder arthroplasty - 15/05/22
, Adrien Jacquot c, Gilles Walch d, Pierric Deransart e, Luc Favard a, Marc-Olivier Gauci f
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Abstract |
Introduction |
The arm change position (ACP) is a new parameter for evaluating the humerus’ 3D displacement following reverse shoulder arthroplasty (RSA) during 3D pre operative planning. The purpose of this study was to analyze the relationship between ACP variations after RSA and simulated passive joint mobility. The assumption is that the ACP will to help optimize the passive joint mobility of a RSA implant.
Methods |
In 30 degenerative shoulders, four shoulder surgeons planned a RSA with virtual motion analysis. After this analysis, each plan was revised to optimize the range of motion. Relationships between the differences in movement amplitude and the differences in ACP were evaluated.
Results |
Arm lengthening and humerus lateralization were significantly associated with better joint mobility in all three planes (frontal, sagittal and axial). They were equally important for improving external rotation, extension, flexion and adduction. Anterior displacement of the humerus improved both internal and external rotation.
Discussion |
The ACP is a useful preoperative planning parameter for RSA. It could help with selecting the best implant combination, as well as determining their position, in order to optimize the simulated passive mobility relative to humerus displacement after RSA. To validate the value of the ACP in clinical practice, a prospective study is needed in which the postoperative joint mobility is measured in vivo as a function of the ACP.
Level of evidence |
III, case control study.
Le texte complet de cet article est disponible en PDF.Keywords : Preoperative planning, Reverse shoulder arthroplasty, Arm change position, Arm lengthening, Range of motion
Plan
Vol 108 - N° 3
Article 103246- mai 2022 Retour au numéro
Article précédent
- Survival and failure analysis of 167 medial opening wedge high tibial osteotomy with a locking titanium plate
- Simo S.A. Miettinen, Hannu J.A. Miettinen, Jussi Jalkanen, Antti Joukainen, Heikki Kröger
- Preoperative planning of baseplate position in reverse shoulder arthroplasty: Still no consensus on lateralization, version and inclination
- Julien Berhouet, Adrien Jacquot, Gilles Walch, Pierric Deransart, Luc Favard, Marc-Olivier Gauci
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