title: A 36-month evaluation of self-etch and etch-and-rinse adhesives in noncarious cervical lesions.
abstract: BACKGROUND
  There are two bonding strategies for composite restorations: the etch-and-rinse (ER) approach and the self-etch (SE) approach. Few clinical trials have evaluated the SE approach in Class V restorations for a 36-month period. The authors conducted a study to evaluate whether the SE system can provide retention rates and marginal discoloration similar to that of the ER system.
  
  
  METHODS
  Twenty-five patients, each having at least two pairs of equivalent noncarious cervical lesions under occlusion, were enrolled in this study. Two calibrated operators placed 78 restorations, one-half for ER and one-half for SE. Two independent examiners evaluated the restorations at baseline and after six-, 12-, 18- and 36-month periods according to the slightly modified U.S. Public Health Service criteria. Statistical analysis between materials in each period was conducted using a Fisher exact test (alpha = .05), and the performance of the materials at baseline in comparison with each period was evaluated by a McNemar test (alpha = .05).
  
  
  RESULTS
  Five SE restorations and one ER restoration were lost after 36 months. After 36 months, 10 SE and five ER restorations were rated Bravo in marginal adaptation (P > .05). Fourteen SE and five ER restorations were rated Bravo in marginal discoloration (P < .05).
  
  
  CONCLUSIONS
  Although a significantly increased marginal discoloration was observed with SE, both adhesives showed retention rates in noncarious cervical lesions that were not statistically different after 36 months.
  
  
  CONCLUSIONS
  The ER and SE adhesive systems can be used with confidence; however, SE adhesive showed a faster and more progressive enamel marginal degradation.
authors.affiliation: School of Dentistry, Department of Dental Materials and Operative Dentistry, Unviersity of Oeste de Santa Catarina, Campus Joaçaba-Santa Catarina, Joaçaba, Santa Catarina, Brazil. aloguercio@hotmail.com
authors.forename: Alessandro Dourado
authors.initials: AD
authors.lastname: Loguercio
authors.forename: Dax Dalton
authors.initials: DD
authors.lastname: Bittencourt
authors.forename: Luiz Narciso
authors.initials: LN
authors.lastname: Baratieri
authors.forename: Alessandra
authors.initials: A
authors.lastname: Reis
mesh_terms: D000328:Adult; D017438:Bisphenol A-Glycidyl Methacrylate / Q000737:chemistry; D003188:Composite Resins / Q000737:chemistry; D045662:Dental Etching / Q000379:methods*; D017268:Dental Prosthesis Retention / Q000379:methods*; D003793:Dental Restoration, Permanent / Q000379:methods; D017220:Dentin-Bonding Agents / Q000737:chemistry*; D005260:Female; D006801:Humans; D008137:Longitudinal Studies; D008297:Male; D008875:Middle Aged; D019279:Resin Cements / Q000737:chemistry; D019237:Tooth Cervix
chemical_list: D003188:Composite Resins; D017220:Dentin-Bonding Agents; C452225:Filtek A110 composite resin; C408584:Prompt L-Pop; D019279:Resin Cements; C115612:single bond; D017438:Bisphenol A-Glycidyl Methacrylate