title: Fully uncemented glenoid component in total shoulder arthroplasty.
abstract: BACKGROUND
  Loosening of the glenoid component remains the most common problem in total shoulder arthroplasty. It has been described that the round-backed, all-polyethylene components with cemented peg fixation perform better biomechanically and clinically than flat-backed, metal-backed, or keeled components. However, side effects of cementing have been described. We hypothesized that cementing of a specific type of all-polyethylene glenoid component with 3 peripheral pegs and 1 central anchor peg is not necessary to obtain good clinical and radiologic results.
  
  
  METHODS
  Thirty-four shoulders (34 patients), with a mean follow-up of 28.3 months, were evaluated clinically with the Constant-Murley score and the SF-12 Health Survey score. The fixation of the glenoid component was evaluated with computed tomography scan.
  
  
  RESULTS
  The Constant-Murley score increased from 40.2 points (range, 13-73 points) preoperatively to 72 points (range, 54-93 points) postoperatively. The SF-12 Physical Component Summary score was 45, and the SF-12 Mental Component Summary score was 50. No signs of loosening were seen around the pegs or glenoid in 30 shoulders. Signs of loosening were seen around the central anchor peg and the peripheral pegs in 4 shoulders. There was no statistical difference between the clinical outcome of patients with and without signs of loosening.
  
  
  CONCLUSIONS
  The clinical and radiologic evaluation of an uncemented all-polyethylene glenoid is promising, with good clinical results and with no signs of loosening in 88% of the patients on computed tomography scans.
authors.affiliation: Department of Orthopaedic Surgery and Traumatology, Ghent University Hospital, Gent, Belgium. Electronic address: lieven.dewilde@uzgent.be.
authors.forename: Lieven
authors.initials: L
authors.lastname: De Wilde
authors.forename: Nader
authors.initials: N
authors.lastname: Dayerizadeh
authors.forename: Francis
authors.initials: F
authors.lastname: De Neve
authors.forename: Carl
authors.initials: C
authors.lastname: Basamania
authors.forename: Alexander
authors.initials: A
authors.lastname: Van Tongel
mesh_terms: D000368:Aged; D019643:Arthroplasty, Replacement / Q000379:methods*; D002484:Cementation; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007595:Joint Prosthesis; D008297:Male; D008875:Middle Aged; D010003:Osteoarthritis / Q000601:surgery*; D011095:Polyethylenes; D011474:Prosthesis Design; D011475:Prosthesis Failure; D012189:Retrospective Studies; D012785:Shoulder Joint / Q000601:surgery*; D013997:Time Factors; D016896:Treatment Outcome
chemical_list: D011095:Polyethylenes
keywords: Case Series; Level IV; Total shoulder arthroplasty; Treatment Study; glenoid component; polyethylene; uncemented