title: Noncarious class V lesions restored with a polyacid modified resin composite and a nanocomposite: a two-year clinical trial.
abstract: OBJECTIVE
  The purpose of this study was to compare the clinical performance of a polyacid modified resin composite and a nanocomposite applied with an antibacterial adhesive system over a period of 2 years in noncarious Class V lesions.
  
  
  METHODS
  Twenty-four patients with at least two noncarious cervical lesions were enrolled in the study. The teeth were restored with a polyacid modified resin composite (Dyract eXtra, Dentsply DeTrey) or a nanocomposite (Filtek Supreme, 3M/ESPE). Fifty restorations of each material were placed with no marginal bevels and no mechanical retentions using an antibacterial self-etching adhesive system (Clearfil Protect Bond, Kuraray). All lesions were evaluated at baseline, 6, 12, and 24 months periods using the USPHS criteria for color match, marginal discoloration, marginal adaptation, caries formation, anatomic form, postoperative sensitivity, surface roughness, and retention. The changes across the four time points were assessed using Friedman and Wilcoxon Signed Ranks tests. The two restorative materials were compared in the same recall period for each of the criteria using chi-square test (p = 0.05).
  
  
  RESULTS
  Dyract eXtra restorations exhibited a significantly better color match than Filtek Supreme restorations; however, all restorations in both groups were clinically acceptable. Filtek Supreme's retention rate (100%) was found to be significantly better than that of Dyract eXtra (96%). Two Dyract eXtra restorations were completely lost while one was partially fractured (p < or = 0.05). Significant differences were observed in marginal adaptation and color match of Filtek Supreme restorations and marginal discoloration of Dyract eXtra and Filtek Supreme restorations between the baseline and the 2-year scores (p < or = 0.05).
  
  
  CONCLUSIONS
  Both restorative materials showed acceptable clinical performance in Class V noncarious lesions after 2 years of clinical service.
authors.affiliation: Ege University School of Dentistry, Department of Restorative Dentistry and Endodontics, Izmir, Turkey. sebnemturkun@hotmail.com
authors.forename: L Sebnem
authors.initials: LS
authors.lastname: Türkün
authors.forename: Esra Uzer
authors.initials: EU
authors.lastname: Celik
mesh_terms: D000328:Adult; D003116:Color; D020770:Compomers / Q000737:chemistry*; D003188:Composite Resins / Q000737:chemistry*; D001840:Dental Bonding; D003731:Dental Caries / Q000145:classification; D018772:Dental Marginal Adaptation; D003764:Dental Materials / Q000737:chemistry*; D019232:Dental Restoration Failure; D003793:Dental Restoration, Permanent / Q000379:methods*; D003807:Dentin Sensitivity / Q000145:classification; D017220:Dentin-Bonding Agents / Q000737:chemistry; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D053761:Nanocomposites / Q000737:chemistry*; D013499:Surface Properties; D019237:Tooth Cervix / Q000473:pathology; D014076:Tooth Diseases / Q000145:classification / Q000628:therapy*
chemical_list: C503075:Clearfil Protect Bond; D020770:Compomers; D003188:Composite Resins; D003764:Dental Materials; D017220:Dentin-Bonding Agents; C088486:Dyract; C474035:Filtek Supreme