Abstract
The aim of the study was to assess proprioception after shoulder arthroplasty. Twenty-six patients were enrolled who underwent total shoulder arthroplasty (TSA) (n = 13) or hemi-arthroplasty (n = 8) for shoulder osteoarthritis or reversed arthroplasty (n = 5) for cuff tear arthropathy. All patients were examined before the operation and then again six months thereafter in a motion analysis study with an active angle-reproduction (AAR) test. In all groups the AAR deteriorated at 60° flexion (from 5.5° [SD 2.8] to 7.6° [SD 2.7]; p = 0.007) and at 30° external rotation (ER) (from 6.5° [SD 3.6] to 7.3° [SD 4.8°]; p = 0.023) six months after surgery. In the subgroup of TSA, there was deterioration at 30° ER (p = 0.036). Otherwise, there were no significant changes within or among the subgroups. Proprioception, assessed by the AAR test, remained unchanged or deteriorated six months after shoulder arthroplasty. This might be related to the reduced pain or to the relatively short follow-up period.
Résumé
Le but de cette étude est d’évaluer la proprioceptivité des prothèses d’épaule. 26 patients ont bénéficié d’une arthroplastie totale (TSA) (n = 13) ou d’une prothèse intermédiaire hémi-arthroplastie (n = 8). Tous les patients présentaient une arthrose de l’épaule, enfin une arthroplastie inversée de type Grammont a été mise en place chez 5 patients pour des lésions associées de la coiffe. L’âge moyen était de 68,8 ans, SD 10,1 avec 20 femmes et 6 hommes. Les patients ont été examinés avant l’intervention et à six mois post-opératoire avec analyse de la mobilité à l’aide d’un test de reproduction angulaire (AAR) et comparaison avec un groupe contrôle de sujets sain.s Le test AAR s’est dégradé à 60° de flexion (5,5° à 7,6° p = 0.007) à 30° rotation externe (6,5° à 7,3° p = 0.023) six mois après la chirurgie. Dans le sous groupe des prothèses totales cette détérioration se fait à 30° RE (p = 0,036). Il n’y a pas de différence significative entre tous les sous groupes. La proprioception qui peut être évaluée par le test AAR a un aspect inchangé ou s’est dégradé six mois après la mise en place de la prothèse. Tout ceci est secondaire à la diminution de la douleur, à la libération tissulaire durant l’intervention et/ou à la période d’hospitalisation relativement courte.
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The study was supported by a grant of the Orthopaedic Hospital of the University of Heidelberg and the “Deutsche Arthrosehilfe e.V.”.
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Kasten, P., Maier, M., Rettig, O. et al. Proprioception in total, hemi- and reverse shoulder arthroplasty in 3D motion analyses: a prospective study. International Orthopaedics (SICOT) 33, 1641–1647 (2009). https://doi.org/10.1007/s00264-008-0666-0
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DOI: https://doi.org/10.1007/s00264-008-0666-0