title: Seven-year clinical performance of resin composite versus resin-modified glass ionomer restorations in noncarious cervical lesions.
abstract: OBJECTIVE
  The purpose of this study was to comparatively assess the seven-year clinical performance of a one-bottle etch-and-rinse adhesive with resin composite (RC) and resin-modified glass ionomer (RMGI) restorations in noncarious cervical lesions.
  
  
  METHODS
  One operator placed 70 restorations (35 restorations in each group) in 30 patients under rubber dam isolation without mechanical preparation. The restorations were directly assessed by two independent examiners, using modified US Public Health Service criteria at baseline and 6, 12, 24, 60, and 84 months. The obtained data were tabulated and statistically analyzed using the Fisher and McNemar tests. A difference was significant if p<0.05.
  
  
  RESULTS
  Twenty patients were available for recall after seven years (66.6%), and 25 RC and 26 RMGI restorations out of 70 restorations were evaluated. Excellent agreement was registered for all criteria between examiners (κ≥0.85). Alfa and bravo scores were classified as clinically acceptable. The McNemar test detected significant differences within RC restorations between baseline and seven-year evaluations for anatomic form, marginal integrity, and retention (p<0.05). For RMGI restorations, a significant difference was identified for marginal integrity (p<0.05). As to material comparison, the Fisher exact showed a better retention performance for RMGI restorations than for RC restorations (p<0.05). Twelve composite restorations were dislodged (52.0% retention) and three ionomer restorations were lost (88.5% retention). The cumulative success rate for RC and RMGI was 30% and 58.1%, respectively.
  
  
  CONCLUSIONS
  After seven years of service, the clinical performance of RMGI restorations was superior to that of the adhesive system/resin composite restorations in this study.
authors.forename: T C
authors.initials: TC
authors.lastname: Fagundes
authors.forename: T J E
authors.initials: TJ
authors.lastname: Barata
authors.forename: E
authors.initials: E
authors.lastname: Bresciani
authors.forename: Sl
authors.initials: S
authors.lastname: Santiago
authors.forename: E B
authors.initials: EB
authors.lastname: Franco
authors.forename: J R P
authors.initials: JR
authors.lastname: Lauris
authors.forename: M F
authors.initials: MF
authors.lastname: Navarro
mesh_terms: D000180:Acrylic Resins; D000293:Adolescent; D000328:Adult; D003188:Composite Resins; D003731:Dental Caries; D003793:Dental Restoration, Permanent; D006801:Humans; D008875:Middle Aged; D012822:Silicon Dioxide; D019237:Tooth Cervix / Q000473:pathology*; D055815:Young Adult
chemical_list: D000180:Acrylic Resins; D003188:Composite Resins; C015897:glass ionomer; D012822:Silicon Dioxide