title: Humeral component modularity may not be an important factor in the outcome of shoulder arthroplasty for glenohumeral osteoarthritis.
abstract: We examined the outcomes of using 3 types of humeral prostheses in total shoulder arthroplasty for osteoarthritis: a modular prosthesis with variable head diameters (MV), a nonmodular prosthesis with variable head diameters (NV), and a nonmodular prosthesis with a fixed head diameter (NF). Patients (N=101) completed self-assessments of shoulder function and health status before surgery and at follow-up between 30 and 60 months after surgery. Outcomes for the MV and NV prostheses did not differ statistically. The NF prosthesis trended toward poorer functional scores. Two Short Form-36 dimensions were statistically significantly lower (P<.05) in the NF group than in the MV and NV groups. These results fail to confirm that humeral component modularity is an important factor in the outcome of shoulder arthroplasty.
authors.affiliation: Department of Orthopaedic Surgery, Advanced Healthcare, S.C., Milwaukee, Wisconsin, USA.
authors.forename: R Sean
authors.initials: RS
authors.lastname: Churchill
authors.forename: Branko
authors.initials: B
authors.lastname: Kopjar
authors.forename: Edward V
authors.initials: EV
authors.lastname: Fehringer
authors.forename: Richard S
authors.initials: RS
authors.lastname: Boorman
authors.forename: Frederick A
authors.initials: FA
authors.lastname: Matsen
mesh_terms: D000368:Aged; D019643:Arthroplasty, Replacement / Q000295:instrumentation / Q000379:methods*; D015331:Cohort Studies; D005260:Female; D006801:Humans; D007595:Joint Prosthesis; D008297:Male; D008875:Middle Aged; D010003:Osteoarthritis / Q000175:diagnosis / Q000601:surgery*; D010149:Postoperative Pain / Q000503:physiopathology; D011336:Probability; D011379:Prognosis; D011474:Prosthesis Design; D011475:Prosthesis Failure; D017755:Prosthesis Fitting; D011788:Quality of Life; D016059:Range of Motion, Articular / Q000502:physiology; D020127:Recovery of Function; D012189:Retrospective Studies; D018570:Risk Assessment; D012785:Shoulder Joint / Q000503:physiopathology / Q000601:surgery*; D016896:Treatment Outcome