title: Randomized controlled trial of the 2-year clinical performance of a silorane-based resin composite in class 1 posterior restorations.
abstract: OBJECTIVE
  To compare the 2-year clinical performance of a silorane-based resin composite with that of an established nanoceramic resin composite for class 1 posterior restorations.
  
  
  METHODS
  In this randomized controlled study, 100 class 1 molar cavities were prepared in 50 subjects. Each subject received a restoration with Filtek Silorane and Ceram.X Duo in different quadrants. The restorations were evaluated using the modified USPHS criteria at baseline and 6, 12, and 24 months. Parametric changes over the 2-year period were assessed with the Friedman test. The baseline and recall scores were compared by using the Wilcoxon signed-rank test (P < 0.05).
  
  
  RESULTS
  No subject developed secondary caries or postoperative sensitivity. Further, the resin composites showed no significant differences in all the evaluated parameters over 2 years (P > 0.05). At 2 years, four Filtek Silorane and seven Ceram.X Duo restorations had Bravo scores for anatomic form, marginal adaptation, and surface texture (P < 0.05); however, these changes were mainly the effect of scoring shifts from Alfa to Bravo. Overall, both materials showed good clinical results with predominantly Alfa scores.
authors.affiliation: Department of Operative Dentistry, Faculty of Dentistry, Istanbul University, 34390 Capa, Istanbul, Turkey. begumguray@yahoo.com
authors.forename: Begüm Güray
authors.initials: BG
authors.lastname: Efes
authors.forename: Batu Can
authors.initials: BC
authors.lastname: Yaman
authors.forename: Ozge
authors.initials: O
authors.lastname: Gurbuz
authors.forename: Burak
authors.initials: B
authors.lastname: Gumuştaş
mesh_terms: D000328:Adult; D017609:Barium Compounds / Q000737:chemistry; D002516:Ceramics / Q000737:chemistry; D003116:Color; D003188:Composite Resins / Q000737:chemistry*; D001840:Dental Bonding; D003731:Dental Caries / Q000628:therapy; D018772:Dental Marginal Adaptation; D003764:Dental Materials / Q000737:chemistry*; D003793:Dental Restoration, Permanent / Q000145:classification*; D005260:Female; D005500:Follow-Up Studies; D005898:Glass / Q000737:chemistry; D006801:Humans; D008297:Male; D008875:Middle Aged; D008963:Molar / Q000473:pathology; D053761:Nanocomposites / Q000737:chemistry; D017640:Silicates / Q000737:chemistry; D012822:Silicon Dioxide / Q000737:chemistry; D062047:Silorane Resins / Q000737:chemistry*; D013499:Surface Properties; D055815:Young Adult
chemical_list: D017609:Barium Compounds; C520091:CeramX; D003188:Composite Resins; D003764:Dental Materials; D017640:Silicates; D062047:Silorane Resins; C415406:barium borosilicate; C555513:silorane composite resin; D012822:Silicon Dioxide