title: An in vitro microleakage study of the 'bonded-base' restorative technique.
abstract: Microleakage associated with a silver-reinforced restorative glass-ionomer cement (Hi-Dense) used with a composite resin (Z100) in a modified Class II bonded-base technique restoration was evaluated. The influence of long-term artificial saliva storage, thermal and load cycling was also determined. Class II composite (Z100) restorations used with a new dental adhesive system (Scotchbond Multi-Purpose Dental Adhesive) were used as controls. Results showed that the bonded-base technique can reduce the leakage observed with the direct composite technique. Thermocycling decreased the leakage at the composite-enamel interface but had no effect on the leakage at the composite-dentine interface or on the leakage patterns of bonded-base restorations. Load cycling had no significant influence on leakage patterns of either type of restorative mode. Storage in artificial saliva resulted in decreased leakage at the composite-enamel interface but had a minor adverse effect at the glass-ionomer-dentine interface.
authors.affiliation: Department of Conservative Dentistry, Eastman Institute of Oral Health Sciences, London, U.K.
authors.forename: A U
authors.initials: AU
authors.lastname: Yap
authors.forename: B Y
authors.initials: BY
authors.lastname: Mok
authors.forename: G
authors.initials: G
authors.lastname: Pearson
mesh_terms: D000269:Adhesives; D016722:Cermet Cements / Q000737:chemistry*; D003188:Composite Resins / Q000737:chemistry*; D001840:Dental Bonding; D003743:Dental Enamel / Q000648:ultrastructure; D003763:Dental Leakage / Q000473:pathology / Q000517:prevention & control*; D003793:Dental Restoration, Permanent / Q000145:classification / Q000379:methods*; D003804:Dentin / Q000648:ultrastructure; D017220:Dentin-Bonding Agents / Q000737:chemistry; D005899:Glass Ionomer Cements / Q000737:chemistry*; D006801:Humans; D019279:Resin Cements; D012464:Saliva, Artificial / Q000737:chemistry; D012822:Silicon Dioxide; D013314:Stress, Mechanical; D013499:Surface Properties; D013816:Thermodynamics; D015040:Zirconium
chemical_list: D000269:Adhesives; D016722:Cermet Cements; D003188:Composite Resins; D017220:Dentin-Bonding Agents; D005899:Glass Ionomer Cements; C106661:Hi-Dense; D019279:Resin Cements; D012464:Saliva, Artificial; C084018:Scotchbond Multi-Purpose; C083568:Z100 composite resin; D012822:Silicon Dioxide; D015040:Zirconium