ABSTRACT
PURPOSE: To investigate the effect of surface treatments on the bond strength between two resin' composite inlay materials and their luting materials. MATERIALS AND METHODS: A notched disc specimen design was used to evaluate the torque to fracture: test specimens consisting of two half notched disc specimens bonded together, controls consisting of complete resin composite material specimens. RESULTS: Both surface treatment and bond resin application had a significant influence on interfacial bond strength--the torque required to initiate failure being expressed as a percentage of the value required to fracture the control specimens. CONCLUSION: The results allow conclusions to be drawn regarding the attainment of optimal bonding between the resin composite inlays and luting materials investigated.
Subject(s)
Composite Resins , Dental Bonding , Dental Cements , Inlays , Resin Cements , Bisphenol A-Glycidyl Methacrylate/chemistry , Composite Resins/chemistry , Dental Cements/chemistry , Dentin-Bonding Agents/chemistry , Materials Testing , Rotation , Stress, Mechanical , Surface PropertiesABSTRACT
Dual-cure composite resin luting cements are increasingly being used for the cementation of porcelain veneers, composite and ceramic inlays, onlays and crowns. This investigation assessed the effect of a dual-cure adhesive (Bondlite) on the working time of a dual-cure composite resin luting cement (Porcelite Dual-Cure). An oscillating rheometer was used to measure the working time of the composite resin luting cement with and without prior application of dual-cure adhesive. The results demonstrated that use of the dual-cure adhesive significantly reduced the working time of the manufacturer's dual-cure composite resin luting cement.
Subject(s)
Composite Resins/chemistry , Dental Cements/chemistry , Dental Restoration, Permanent/methods , Analysis of Variance , Materials Testing/instrumentation , Time Factors , ViscosityABSTRACT
The purpose of this study was to compare the microleakage around direct composite inlays bonded with a dual cure luting composite into Class V type inlay cavities in extracted molar teeth. Bonding methods which included two cavity cleansing regimes and three bonding treatments were used. Either pumice and rinse or rinse only cavity cleansing was used to remove the separator agent (agar/alcohol) from the cavity surface prior to inlay bonding. Restorations were thermocycled between 5 degrees C and 55 degrees C (with intermediate baths at 36 degrees C) before (240 cycles) and during (12 cycles) silver staining. Microleakage around the sectioned restorations was quantified using digital imaging microscopy at x 40 magnification. Data analysis indicated that failure to include pumice slurry application as part of the cavity cleansing regime prior to bonding lead to a marked increase in microleakage at the enamel/restoration interface following one of the three bonding treatments.
Subject(s)
Composite Resins/chemistry , Dental Bonding/methods , Dental Leakage/etiology , Inlays , Silicates , Air , Analysis of Variance , Dental Cavity Preparation/instrumentation , Dental Cavity Preparation/methods , Dental Cements/chemistry , Dental Enamel , Dental Leakage/diagnosis , Dentin , Glutaral/chemistry , Humans , Methacrylates/chemistry , Polymethacrylic Acids/chemistry , Silicic Acid , Silver , Staining and Labeling , Surface Properties , WaterABSTRACT
The microleakage of indirect porcelain and direct composite resin-bonded inlays was compared with that of posterior composite resin restorations using Class II preparations of extracted molar teeth. The resin-bonded inlay restorations provided a better marginal seal at the cervical restoration/dentin interface than did the composite resin restoration. The efficacy of this marginal seal varied with the particular treatments and materials used. Resin-bonded porcelain inlays had a higher incidence of cervical excess from the composite resin luting agent than did the posterior composite resin restorations.
