title: Marginal microleakage of class V resin-based composite restorations bonded with six one-step self-etch systems.
abstract: This study compared the microleakage of class V restorations bonded with various one-step self-etching adhesives. Seventy class V resin-based composite restorations were prepared on the buccal and lingual surfaces of 35 premolars, by using: Clearfil S3 Bond, G-Bond, iBond, One Coat 7.0, OptiBond All-In-One, or Xeno IV. The Adper Single Bond etch-and-rinse two-step adhesive was employed as a control. Specimens were thermocycled for 500 cycles in separate water baths at 5°C and 55°C and loaded under 40 to 70 N for 50,000 cycles. Marginal microleakage was measured based on the penetration of a tracer agent. Although the control showed no microleakage at the enamel margins, there were no differences between groups (p = 0.06). None of the adhesives avoided microleakage at the dentin margins, and they displayed similar performances (p = 0.76). When both margins were compared, iBond® presented higher microleakage (p < 0.05) at the enamel margins (median, 1.00; Q3-Q1, 1.25-0.00) compared to the dentin margins (median, 0.00; Q3-Q1, 0.25-0.00). The study adhesives showed similar abilities to seal the margins of class V restorations, except for iBond®, which presented lower performance at the enamel margin.
authors.affiliation: Department of Dentistry, Dental School, Univ Estadual de Ponta Grossa, Ponta Grossa, PR, Brazil. snzcd@uepg.br
authors.forename: Alfonso
authors.initials: A
authors.lastname: Sánchez-Ayala
authors.forename: Arcelino
authors.initials: A
authors.lastname: Farias-Neto
authors.forename: Larissa Soares Reis
authors.initials: LS
authors.lastname: Vilanova
authors.forename: João Carlos
authors.initials: JC
authors.lastname: Gomes
authors.forename: Osnara Maria Mongruel
authors.initials: OM
authors.lastname: Gomes
mesh_terms: D003188:Composite Resins / Q000737:chemistry*; D001840:Dental Bonding / Q000379:methods*; D003737:Dental Cavity Preparation; D003743:Dental Enamel / Q000648:ultrastructure; D045662:Dental Etching; D003763:Dental Leakage / Q000175:diagnosis / Q000517:prevention & control; D018772:Dental Marginal Adaptation; D003793:Dental Restoration, Permanent / Q000379:methods*; D003799:Dental Stress Analysis; D003804:Dentin / Q000648:ultrastructure; D017220:Dentin-Bonding Agents / Q000737:chemistry*; D006801:Humans; D008422:Materials Testing; D019279:Resin Cements / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D003188:Composite Resins; D017220:Dentin-Bonding Agents; D019279:Resin Cements