title: Radiographic results of fully uncemented trabecular metal reverse shoulder system at 1 and 2 years' follow-up.
abstract: BACKGROUND
  The purpose of this study was to assess the short-term radiographic outcome of a fully uncemented reverse total shoulder arthroplasty (RTSA) system.
  
  
  METHODS
  We reviewed the radiographs of 98 consecutive patients undergoing uncemented RTSA. All patients had a standardized series of radiographs taken at 2 weeks, 1 year, and 2 years postoperatively. Humeral stems were evaluated for radiolucent lines by zone and component subsidence. Evaluation for scapular notching and radiolucency surrounding the baseplate implant within the glenoid vault was also performed.
  
  
  RESULTS
  At 1 year, 93.9% of humeral stems had no lucent lines and 6.1% had less than 2 mm of lucency. Of the scapulae, 76.6% showed no evidence of notching, 21.4% had type 1 scapular notching, and 2.0% had type 2 notching at 1 year. At 2 years, 89.5% of humeral stem components had no lucent lines and 10.5% had less than 2 mm of lucency. Fifty-seven percent of scapulae had no notching, 34.2% had type 1 notching, 5.3% had type 2 notching, and 2.6% had type 3 notching. No stems had lucency in more than 1 zone or lucency ≥ 2 mm; 9.2% had subsidence of 2 mm or less. No glenoid components had any lucency around the baseplate or screws.
  
  
  CONCLUSIONS
  Cementless trabecular metal porous-coated implants for RTSA are associated with secure glenoid fixation and minimal radiographic evidence of humeral stem loosening or subsidence at short-term follow-up. The rates of scapular notching found in our study are comparable to previous studies and did not affect implant stability.
authors.affiliation: University of Rochester Medical Center, 601 Elmwood Ave, Rochester, NY 14625, USA.
authors.forename: Andrew
authors.initials: A
authors.lastname: Bogle
authors.forename: Matthew
authors.initials: M
authors.lastname: Budge
authors.forename: Adam
authors.initials: A
authors.lastname: Richman
authors.forename: Richard J
authors.initials: RJ
authors.lastname: Miller
authors.forename: J Michael
authors.initials: JM
authors.lastname: Wiater
authors.forename: Ilya
authors.initials: I
authors.lastname: Voloshin
mesh_terms: D000368:Aged; D019643:Arthroplasty, Replacement; D001672:Biocompatible Materials; D001843:Bone Cements; D005500:Follow-Up Studies; D006801:Humans; D007592:Joint Diseases / Q000000981:diagnostic imaging* / Q000601:surgery; D007595:Joint Prosthesis; D008670:Metals; D011859:Radiography; D017006:Rotator Cuff / Q000000981:diagnostic imaging* / Q000601:surgery; D000070636:Rotator Cuff Injuries; D012785:Shoulder Joint / Q000000981:diagnostic imaging* / Q000601:surgery*; D016896:Treatment Outcome
chemical_list: D001672:Biocompatible Materials; D001843:Bone Cements; D008670:Metals