title: Survival Analysis of the Single- and Double-Coated STAR Ankle up to 20 Years: Long-Term Follow-up of 324 Cases From the Swedish Ankle Registry.
abstract: BACKGROUND
  The Scandinavian Total Ankle Replacement (STAR) has been used widely in Europe and more recently in the United States. We studied the results of the single-coated and the double-coated STAR with long-term follow-up.
  
  
  METHODS
  All STARs (n = 324) used in Sweden (first implanted in 1993) were included. Prosthetic survival was estimated according to Kaplan-Meier.
  
  
  RESULTS
  The 14-year survival of the single-coated STAR was 0.47 (95% confidence interval [CI], 0.38-0.66), and the 12-year survival of the double-coated STAR was 0.64 (95% CI, 0.57-0.71). Women younger than 60 years with osteoarthritis had a statistically significantly higher risk of revision than men and than patients with other diagnoses.
  
  
  CONCLUSIONS
  The long-term results of the STAR prosthesis are not encouraging. The results seem to deteriorate by time.
  
  
  METHODS
  Level IV, retrospective case series.
authors: Department of Orthopedic Surgery, Falun General Hospital, Falun, Sweden anders.henricson@ltdalarna.se.
authors: Anders
authors: A
authors: Henricson
authors: Department of Orthopaedics and Clinical Sciences, Lund University, Malmö, Sweden Department of Orthopaedic Surgery, Skåne University Hospital, Malmö, Sweden.
authors: Åke
authors: Å
authors: Carlsson
mesh_terms: D000368:Aged; D058737:Arthroplasty, Replacement, Ankle / Q000009:adverse effects* / Q000379:methods; D020099:Coated Materials, Biocompatible; D015331:Cohort Studies; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D015994:Incidence; D007595:Joint Prosthesis; D008297:Male; D008875:Middle Aged; D011474:Prosthesis Design; D011475:Prosthesis Failure; D012042:Registries; D012086:Reoperation; D012189:Retrospective Studies; D018570:Risk Assessment; D013548:Sweden
chemical_list: D020099:Coated Materials, Biocompatible
keywords: STAR prosthesis; ankle registry; total ankle replacement