title: Clinical evaluation of a polyacid-modified resin composite (Dyract AP) in Class I cavities: 3-year results.
abstract: OBJECTIVE
  This study evaluated the 3-year clinical performance of the polyacid-modified resin composite Dyract AP in restorations for Class I carious lesions.
  
  
  METHODS
  108 Class I cavities in 21 subjects were restored with Dyract AP. The lesions, which were diagnosed macroscopically with a probe, involved fissures and had reached the dentin, while lateral spread was limited and localized to the dentin. The average facio-lingual width of the cavities was equal to or less than one-third the intercuspal width. Restorations were evaluated clinically by two experienced, calibrated examiners at baseline and at 1, 2, and 3 years, according to the modified Ryge criteria, (color match, marginal discoloration, wear or loss of anatomical form, caries, marginal adaptation, and surface texture).
  
  
  RESULTS
  None of the restorations failed at the end of the first year. At 2 years, two restorations required immediate replacement due to caries lesions adjacent to the margins. At 3 years, six restorations had caries lesions adjacent to their margins, and the cumulative rate of success was 93.4%. Color changes and marginal discolorations were found to be statistically significant (P < 0.001) at 3 years, although none of the restorations needed to be replaced. Significant differences were also observed in the caries rate (P < 0.001) at 3 years. Aside from the eight failed restorations, the degrees of color matching, marginal discoloration, wear or loss of anatomical form, caries, marginal adaptation, and surface texture were clinically acceptable at 3 years post-treatment.
authors.affiliation: Department of Conservative Dentistry, Faculty of Dentistry, Istanbul University, Capa, Istanbul 34390, Turkey. demirci.md@superonline.com
authors.forename: Mustafa
authors.initials: M
authors.lastname: Demirci
authors.forename: Omer
authors.initials: O
authors.lastname: Uysal
mesh_terms: D000134:Acid Etching, Dental / Q000379:methods; D000293:Adolescent; D000328:Adult; D002484:Cementation; D020770:Compomers; D003737:Dental Cavity Preparation; D019232:Dental Restoration Failure; D003793:Dental Restoration, Permanent / Q000379:methods*; D006801:Humans; D008298:Maleates; D011109:Polymethacrylic Acids; D019279:Resin Cements; D016019:Survival Analysis
chemical_list: D020770:Compomers; C088486:Dyract; D008298:Maleates; D011109:Polymethacrylic Acids; C425843:Prime and Bond NT; D019279:Resin Cements; C444699:non-rinse conditioner