title: Effect of four intermediate layer treatments on microleakage of Class II composite restorations.
abstract: This in vitro study examines the marginal sealing ability of four different intermediate materials applied before placement of a condensable composite. Class II preparations were made with gingival margins placed 1.0 mm apical to the cementoenamel junction of 60 extracted teeth, randomly assigned to five groups of 12. Following restoration, teeth were thermocycled, soaked in 0.5% basic fuchsin, and sectioned longitudinally. The resin-modified glass ionomer cement demonstrated significantly less microleakage than the use of a dentin bonding agent alone or in combination with flowable composite, flowable compomer, or autoploymerizing composite (p < 0.05, Dunn's test). This study supports the use of the glass ionomer open sandwich technique in deep Class II direct composite restorations.
authors.affiliation: University of the Pacific School of Dentistry, USA.
authors.forename: M S
authors.initials: MS
authors.lastname: Hagge
authors.forename: J S
authors.initials: JS
authors.lastname: Lindemuth
authors.forename: J F
authors.initials: JF
authors.lastname: Mason
authors.forename: J F
authors.initials: JF
authors.lastname: Simon
mesh_terms: D020770:Compomers / Q000737:chemistry; D003188:Composite Resins / Q000737:chemistry*; D003737:Dental Cavity Preparation / Q000145:classification; D003763:Dental Leakage / Q000145:classification*; D018772:Dental Marginal Adaptation; D003793:Dental Restoration, Permanent / Q000145:classification*; D003804:Dentin / Q000473:pathology; D017220:Dentin-Bonding Agents / Q000737:chemistry; D005881:Gingiva / Q000473:pathology; D005899:Glass Ionomer Cements / Q000737:chemistry; D006801:Humans; D008422:Materials Testing; D008689:Methacrylates / Q000737:chemistry; D011109:Polymethacrylic Acids / Q000737:chemistry; D019279:Resin Cements / Q000737:chemistry; D012117:Resins, Synthetic / Q000737:chemistry; D012394:Rosaniline Dyes; D017640:Silicates / Q000737:chemistry; D013223:Statistics as Topic; D018709:Statistics, Nonparametric; D013499:Surface Properties; D013816:Thermodynamics; D019237:Tooth Cervix / Q000473:pathology; D014783:Viscosity
chemical_list: D020770:Compomers; D003188:Composite Resins; D017220:Dentin-Bonding Agents; C088486:Dyract; C079765:Fuji II LC cement; D005899:Glass Ionomer Cements; D008689:Methacrylates; D011109:Polymethacrylic Acids; C425843:Prime and Bond NT; D019279:Resin Cements; D012117:Resins, Synthetic; C102735:Revolution (composite resin); D012394:Rosaniline Dyes; D017640:Silicates; C111840:flowable hybrid composite; C078905:Bisfil; C025485:basic fuchsin