title: Clinical evaluation of an ormocer, a nanofill composite and a hybrid composite at 2 years.
abstract: OBJECTIVE
  To evaluate the 2-year clinical performance of an ormocer, a new nanofill composite and as a control a conventional hybrid composite restorations in small Class I cavities of permanent molars.
  
  
  METHODS
  90 Class I maxillary cavities were prepared in 90 patients. Cavities were restored incrementally in oblique layers with ormocer (Admira), nanofill (Filtek Supreme), or hybrid (Renew) composite material. Restorations were examined using the United States Public Health Service modified Ryge criteria at baseline, after 6 months, 1 year and 2 years. The changes in the parameters during the 2-year period were assessed with Friedman test analysis. Comparison of the baseline scores with those at the recall periods was evaluated by Wilcoxon signed rank test; the level of significance was set at P< 0.05.
  
  
  RESULTS
  None of the restorative materials exhibited secondary caries or postoperative sensitivity at the 6-month, 1-year or 2-year recall (P> 0.05). After 2 years, except the one failed Admira restoration, no other criteria was clinically unacceptable.
authors.affiliation: Istanbul University, Faculty of Dentistry, Dept. of Operative Dentistry, 34390, Capa, Istanbul, Turkey. begumguray@yahoo.com
authors.forename: Begüm Güray
authors.initials: BG
authors.lastname: Efes
authors.forename: Can
authors.initials: C
authors.lastname: Dörter
authors.forename: Yavuz
authors.initials: Y
authors.lastname: Gömeç
mesh_terms: D000293:Adolescent; D000328:Adult; D002126:Calcium Hydroxide / Q000737:chemistry*; D003188:Composite Resins / Q000737:chemistry*; D003731:Dental Caries / Q000628:therapy; D019232:Dental Restoration Failure; D003793:Dental Restoration, Permanent / Q000379:methods*; D005260:Female; D006801:Humans; D008137:Longitudinal Studies; D008297:Male; D008689:Methacrylates / Q000737:chemistry*; D008875:Middle Aged; D012833:Siloxanes / Q000737:chemistry*; D018709:Statistics, Nonparametric
chemical_list: D003188:Composite Resins; C474035:Filtek Supreme; D008689:Methacrylates; D012833:Siloxanes; C479084:admira; C040409:Renew (dental material); D002126:Calcium Hydroxide