title: A three-year clinical evaluation of a one-step self-etch and a two-step etch-and-rinse adhesive in non-carious cervical lesions.
abstract: OBJECTIVE
  The aim of the study was to assess a one-step self-etch adhesive (Futurabond M, 1-SE) and a two-step etch-and-rinse adhesive (Solobond M, 2-ER) used in combination with the nano-hybrid composite (Amaris) in a prospective clinical study on non-carious cervical lesions.
  
  
  METHODS
  110 restorations were placed in 40 patients and graded over 36 months according to aesthetical, functional and biological criteria (Clinical Oral Investigations 2007;11:5). The four-step etch-and-rinse adhesive Syntac classic (4-ER) combined with the nano-hybrid composite Tetric EvoCeram was used as a control. Cumulative failure rates (CFR), retention rates and Kaplan-Meier survival curves were calculated for each observation period.
  
  
  RESULTS
  After 3 years, the CFR of 33.3% in the 2-ER group was significantly higher compared to those of the 1-SE group (9.1%, p = 0.019) and of the 4-ER group (8.3%, p = 0.035). Additionally, retention rates in the 1-SE and the 4-ER groups were higher compared to 2-ER (p = 0.012 each) after 36 months. Annual failure rates ranged between 2.8% for 4-ER, 3.0% for 1-SE and 11.1% for 2-ER. During the study, restorations in all groups showed progressive marginal deterioration within the limits of clinical acceptance. After 3 years, restorations in the 2-ER and the 4-ER group showed more small defects at dentin than at enamel margins.
  
  
  CONCLUSIONS
  The 1-SE group was clinically as successful as the 4-ER, with both performing better than the 2-ER group. Futurabond M/Amaris can be recommended for the restoration of sclerotic non-carious cervical lesions.
  
  
  CONCLUSIONS
  Number protocol 192/2008.
authors.affiliation: Department of Cariology, Endodontology and Periodontology, University of Leipzig, Liebigstraße 12, 04103 Leipzig, Germany. Electronic address: matthias.haefer@medizin.uni-leipzig.de.
authors.forename: Matthias
authors.initials: M
authors.lastname: Häfer
authors.affiliation: Department of Cariology, Endodontology and Periodontology, University of Leipzig, Liebigstraße 12, 04103 Leipzig, Germany. Electronic address: holger.jentsch@medizin.uni-leipzig.de.
authors.forename: Holger
authors.initials: H
authors.lastname: Jentsch
authors.affiliation: Department of Cariology, Endodontology and Periodontology, University of Leipzig, Liebigstraße 12, 04103 Leipzig, Germany. Electronic address: rainer.haak@medizin.uni-leipzig.de.
authors.forename: Rainer
authors.initials: R
authors.lastname: Haak
authors.affiliation: Department of Cariology, Endodontology and Periodontology, University of Leipzig, Liebigstraße 12, 04103 Leipzig, Germany. Electronic address: hartmut.schneider@medizin.uni-leipzig.de.
authors.forename: Hartmut
authors.initials: H
authors.lastname: Schneider
mesh_terms: D000134:Acid Etching, Dental; D000269:Adhesives; D000293:Adolescent; D000328:Adult; D000368:Aged; D019232:Dental Restoration Failure; D003793:Dental Restoration, Permanent; D006801:Humans; D008137:Longitudinal Studies; D008875:Middle Aged; D011446:Prospective Studies; D055815:Young Adult
chemical_list: D000269:Adhesives
keywords: Adhesive; Etch-and-rinse; Non-carious cervical lesion; Randomized clinical trial; Resin composite; Self-etch