title: Evaluation of acidic primers in microleakage of Class 5 composite resin restorations.
abstract: The purpose of this in vitro study was to evaluate the marginal seal of two adhesive systems on class 5 composite resin restorations. Two adhesive systems that use acidic primers were used in this study: Clearfil Liner Bond 2 and Denthesive II. Scotchbond Multi-Purpose was used as a control. Class 5 cavity preparations were made at the CEJ (half of the preparation was in enamel and half in dentin/cementum) of 60 extracted human molars. Both systems were used with and without etching. The control group was used with etching only. Composite resin restorations were placed, light cured for 40 seconds, and polished. All specimens were thermocycled 500 times. The specimens were immersed in erythrosin B, tetra-iodo-fluorescent 2% solution, then sectioned to obtain 600 mm-thick sections. These were examined under X13.2 magnification, and the degree of dye penetration was measured in microns. A chi-square test demonstrated no significant differences in microleakage among groups for either dentin (P = 0.54) or enamel (P = 0.35).
authors.affiliation: University of Florida, College of Dentistry, Department of Operative Dentistry, Health Science Center, Gainesville 32610-0415, USA.
authors.forename: V V
authors.initials: VV
authors.lastname: Gordan
authors.forename: M A
authors.initials: MA
authors.lastname: Vargas
authors.forename: D S
authors.initials: DS
authors.lastname: Cobb
authors.forename: G E
authors.initials: GE
authors.lastname: Denehy
mesh_terms: D000134:Acid Etching, Dental; D016009:Chi-Square Distribution; D003188:Composite Resins; D001840:Dental Bonding; D003763:Dental Leakage / Q000517:prevention & control*; D003793:Dental Restoration, Permanent / Q000379:methods*; D017220:Dentin-Bonding Agents / Q000737:chemistry; D005069:Evaluation Studies as Topic; D006801:Humans; D008689:Methacrylates; D008855:Microscopy, Electron, Scanning; D019279:Resin Cements
chemical_list: C112274:Clearfil Liner Bond 2; D003188:Composite Resins; C080827:Denthesive; D017220:Dentin-Bonding Agents; D008689:Methacrylates; D019279:Resin Cements; C084018:Scotchbond Multi-Purpose; C074741:Silux Plus