title: A prospective 8-year evaluation of a mild two-step self-etching adhesive and a heavily filled two-step etch-and-rinse system in non-carious cervical lesions.
abstract: OBJECTIVE
  The aim of this study was to evaluate the long-term clinical retention to dentin of a two-step self-etching adhesive system Clearfil SE Bond and a two-step etch-and-rinse system PQ1.
  
  
  METHODS
  A total of 119 Class V restorations were placed in non-carious cervical lesions without intentional involvement of the enamel incisal of the lesions. The restorations were evaluated yearly during an 8-year follow-up. Clinical dentin bonding efficiency was determined by the percentage of lost restorations at each of the recalls.
  
  
  RESULTS
  At 8 years, 112 restorations could be evaluated. Both adhesives fulfilled the ADA 18-month full acceptance criteria for retention with a retention rate of 90.6% for PQ1 and 98.2% for Clearfil SE Bond. The loss rates increased then considerably after 2 and 3 years, respectively. The cumulative loss rates at 8 years were 25.5% for Clearfil SE and 39.3% for PQ1 (p=0.12). No significant differences were observed between lesions with sclerotic and non-sclerotic dentin. The size of the lesions did not influence the bonding effectiveness. A lower loss rate was found for the restorations placed in lesions slightly roughened before etching.
  
  
  CONCLUSIONS
  Both adhesive systems showed acceptable short-term clinical retention to dentin, which decreased after long-time in vivo aging, especially for the simplified etch-and-rinse system.
authors.affiliation: Department of Odontology, Dental School Umeå, Umeå University, 901 87 Umeå, Sweden. Jan.van.Dijken@odont.umu.se
authors.forename: Jan W V
authors.initials: JW
authors.lastname: van Dijken
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001840:Dental Bonding / Q000379:methods*; D045662:Dental Etching / Q000379:methods; D003793:Dental Restoration, Permanent / Q000145:classification / Q000379:methods*; D003804:Dentin / Q000473:pathology; D017220:Dentin-Bonding Agents; D005260:Female; D006801:Humans; D055115:Light-Curing of Dental Adhesives; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D019279:Resin Cements; D019237:Tooth Cervix / Q000473:pathology*
chemical_list: C438313:Clearfil SE Bond; D017220:Dentin-Bonding Agents; C119199:PermaQuik; D019279:Resin Cements