title: Reverse shoulder arthroplasty: does reduced medialisation improve radiological and clinical results?
abstract: The purpose of this retrospective study was to assess the effect of the reduced medialisation of the Arrow reverse shoulder prosthesis on short-term clinical and radiological results. The clinical and radiological results of 47 Delta III reverse prostheses and 49 Arrow reverse prostheses were retrospectively compared at a minimum of twelve months follow-up. There was a significant increase (p < 1.10(-4)) in range of motion from the preoperative range in the two groups except for internal rotation in the Delta III group (p = 0.1). Radiological analysis on anteroposterior view in neutral position showed greater lateralisation (p < 0.001) with the Arrow prosthesis. Scapular notching was noted in 32 patients with a Delta III prosthesis, and in no instance with an Arrow prosthesis. Complication rates were 14.9% for the Delta group and 10.2% for the Arrow group. The design features of the Arrow prosthesis--reduced medialisation of the center of rotation with lateralisation of the humerus--were found to be associated with slight improvement in range of motion and absence of scapular notching.
authors.affiliation: Institut de la Main, Paris, France.
authors.forename: Ibrahim
authors.initials: I
authors.lastname: Kalouche
authors.forename: Nuno
authors.initials: N
authors.lastname: Sevivas
authors.forename: Abhijeet
authors.initials: A
authors.lastname: Wahegaonker
authors.forename: Philippe
authors.initials: P
authors.lastname: Sauzieres
authors.forename: Denis
authors.initials: D
authors.lastname: Katz
authors.forename: Philippe
authors.initials: P
authors.lastname: Valenti
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D019643:Arthroplasty, Replacement / Q000379:methods* / Q000534:rehabilitation; D005260:Female; D006801:Humans; D007595:Joint Prosthesis; D008297:Male; D008875:Middle Aged; D011474:Prosthesis Design; D011475:Prosthesis Failure; D016059:Range of Motion, Articular; D016896:Treatment Outcome