title: Microleakage of composite resin and glass ionomer cement restorations in retentive and nonretentive cervical cavity preparations.
abstract: Ketac Fil glass ionomer cement (GIC) and Scotchbond 2 dentinal bonding agent (DBA)/Silux Plus composite resin restorations were inserted in cervical cavity preparations of extracted human teeth. After thermocycling, the specimens were invested and sectioned longitudinally and horizontally through the center of the restoration. Microleakage was evaluated as a ratio of the extent of methylene blue dye penetration at the tooth-restoration interface. Although all restorations exhibited leakage, both the GIC and bonded composite resin restorations recorded less leakage in retentive than in nonretentive cavity preparations. Composite resin restorations in nonretentive cavity preparations showed significantly more dye penetration toward the pulpal chamber than the GIC restorations. Ketac Fil GIC restorations inserted without a matrix strip exhibited less leakage than those with a matrix strip. The most desirable results were recorded with Scotchbond 2 DBA/Silux Plus composite resin restorations in retentive preparations.
authors.affiliation: Division of Operative Dentistry, University of Tennessee, College of Dentistry, Memphis.
authors.forename: I
authors.initials: I
authors.lastname: Kaplan
authors.forename: H H
authors.initials: HH
authors.lastname: Mincer
authors.forename: E F
authors.initials: EF
authors.lastname: Harris
authors.forename: J S
authors.initials: JS
authors.lastname: Cloyd
mesh_terms: D000134:Acid Etching, Dental; D017438:Bisphenol A-Glycidyl Methacrylate / Q000737:chemistry; D003188:Composite Resins / Q000737:chemistry*; D003737:Dental Cavity Preparation / Q000145:classification / Q000379:methods*; D003739:Dental Cementum / Q000648:ultrastructure; D003743:Dental Enamel / Q000648:ultrastructure; D003763:Dental Leakage / Q000175:diagnosis; D003775:Dental Polishing; D003793:Dental Restoration, Permanent; D017220:Dentin-Bonding Agents / Q000737:chemistry; D005899:Glass Ionomer Cements / Q000737:chemistry*; D006801:Humans; D008298:Maleates / Q000737:chemistry; D008434:Matrix Bands; D008751:Methylene Blue; D019279:Resin Cements; D013499:Surface Properties
chemical_list: D003188:Composite Resins; D017220:Dentin-Bonding Agents; D005899:Glass Ionomer Cements; D008298:Maleates; D019279:Resin Cements; D017438:Bisphenol A-Glycidyl Methacrylate; C040964:Ketac-Fil; C041330:Scotchbond; D008751:Methylene Blue