title: Total shoulder arthroplasty with a second-generation tantalum trabecular metal-backed glenoid component: Clinical and radiographic outcomes at a mean follow-up of 38 months.
abstract: OBJECTIVE
  We evaluated clinical and radiographic outcomes of total shoulder arthroplasty (TSA) using the second-generation Trabecular Metal (TM) Glenoid component. The first generation component was withdrawn in 2005 after a series of failures were reported. Between 2009 and 2012, 40 consecutive patients with unilateral TSA using the second-generation component were enrolled in this clinical study. The mean age of the patients was 63.8 years (40 to 75) and the mean follow-up was 38 months (24 to 42).
  
  
  METHODS
  Patients were evaluated using the Constant score (CS), the American Shoulder and Elbow Surgeons (ASES) score and routine radiographs.
  
  
  RESULTS
  Significant differences were found between the pre- and post-operative CS (p = 0.003), ASES (p = 0.009) scores and CS subscores of pain (p < 0.001), strength (p < 0.001) and mobility items (p < 0.05). No glenoid or humeral components migrated. Posterior thinning of the keel and slight wear at the polyethylene-TM interface was observed in one patient but was asymptomatic. Radiolucent lines were found around three humeral (< 1.5 mm) and two glenoid components (< 1 mm) and all were asymptomatic.
  
  
  CONCLUSIONS
  TSA with the second-generation TM Glenoid component results in satisfactory to excellent clinical performance, function, and subjective satisfaction at a mean follow-up of about three years. Radiographic changes were few and did not affect the outcome.
  
  
  CONCLUSIONS
  This paper highlights that the second generation Trabecular Metal Glenoid has better outcomes than those reported with the first-generation component.
authors.affiliation: "D. Cervesi" Hospital, AUSL della Romagna Ambito Territoriale di Rimini, Italy.
authors.forename: G
authors.initials: G
authors.lastname: Merolla
authors.affiliation: University of British Columbia, Vancouver, University of British Columbia, Canada.
authors.forename: P
authors.initials: P
authors.lastname: Chin
authors.affiliation: University of British Columbia, Vancouver, University of British Columbia, Canada.
authors.forename: T M
authors.initials: TM
authors.lastname: Sasyniuk
authors.affiliation: "D. Cervesi" Hospital, AUSL della Romagna Ambito Territoriale di Rimini, Italy.
authors.forename: P
authors.initials: P
authors.lastname: Paladini
authors.affiliation: "D. Cervesi" Hospital, AUSL della Romagna Ambito Territoriale di Rimini, Italy.
authors.forename: G
authors.initials: G
authors.lastname: Porcellini
mesh_terms: D000203:Activities of Daily Living; D000328:Adult; D000368:Aged; D019643:Arthroplasty, Replacement / Q000295:instrumentation* / Q000379:methods / Q000534:rehabilitation; D001672:Biocompatible Materials / Q000627:therapeutic use*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010003:Osteoarthritis / Q000503:physiopathology / Q000534:rehabilitation / Q000601:surgery; D020959:Polyethylene / Q000627:therapeutic use; D011474:Prosthesis Design; D016059:Range of Motion, Articular / Q000502:physiology; D012189:Retrospective Studies; D012785:Shoulder Joint / Q000502:physiology / Q000601:surgery*; D013635:Tantalum / Q000627:therapeutic use*; D016896:Treatment Outcome
chemical_list: D001672:Biocompatible Materials; D013635:Tantalum; D020959:Polyethylene
keywords: arthroplasty; glenoid; shoulder osteoarthritis; trabecular metal