The effect of rebonding on microleakage of class V aesthetic restorations.
This in vitro study evaluated the effect of rebonding on microleakage of a resin composite, a condensable resin and two polyacid-modified resin composite restorations. Standardized cylindrical Class V dentin cavities were prepared on the buccal root surfaces of 240 extracted bovine incisive teeth. The prepared teeth were randomly assigned to four groups of 60 teeth and restored with the following restorative systems: I--(ZS) Z100/Scotchbond Multi-Purpose Plus; II--(SS) Solitaire/Solid Bond; III--(FS) Freedom/Stae; IV--(FSB) F200/Single Bond. Thirty teeth of each group were rebonded with a low-viscosity resin (Fortify/BISCO), according to the manufacturer's instructions. The remaining teeth received no treatment. All teeth were thermocycled for 5,000 cycles and brushed by hand three times a day for 10 days using a toothbrush and a slurry of dentifrice and water. Specimens were stained in a 2% methylene blue solution and longitudinally sectioned with diamond disks. Microleakage was scored on a scale of 0 to 3. The Kruskal-Wallis test showed statistically significant differences among the groups (h=156.54; alpha<0.05). Pairwise comparison by means of the least significant difference showed that (SS) and (FS) with or without rebonding were not statistically different from each other. These groups showed the highest microleakage differences from (ZS) and (FSB) with or without rebonding. (ZS) with rebonding showed the lowest microleakage that was not statistically different from (ZS) without rebonding and (FSB) with rebonding.
Department of Restorative Dentistry, Piracicaba School of Dentistry, São Paulo, Brazil.
Maria Carolina Guilherme
MC
Erhardt
Cláudia Silami
CS
Magalhães
Mônica Campos
MC
Serra
D000818:Animals; D017438:Bisphenol A-Glycidyl Methacrylate / Q000737:chemistry; D002417:Cattle; D004396:Coloring Agents; D020770:Compomers / Q000737:chemistry*; D003188:Composite Resins / Q000737:chemistry*; D001840:Dental Bonding / Q000379:methods*; D003737:Dental Cavity Preparation / Q000145:classification; D003763:Dental Leakage / Q000145:classification*; D003793:Dental Restoration, Permanent / Q000145:classification*; D003802:Dentifrices / Q000737:chemistry; D003804:Dentin / Q000648:ultrastructure; D017220:Dentin-Bonding Agents / Q000737:chemistry; D004852:Epoxy Compounds / Q000737:chemistry; D005899:Glass Ionomer Cements / Q000737:chemistry; D016555:Matched-Pair Analysis; D008689:Methacrylates / Q000737:chemistry; D008751:Methylene Blue; D011897:Random Allocation; D019279:Resin Cements / Q000737:chemistry; D012822:Silicon Dioxide; D018709:Statistics, Nonparametric; D013499:Surface Properties; D013816:Thermodynamics; D014099:Toothbrushing; D015040:Zirconium
D004396:Coloring Agents; D020770:Compomers; D003188:Composite Resins; D003802:Dentifrices; D017220:Dentin-Bonding Agents; D004852:Epoxy Compounds; C118368:F2000 cement; C095811:Fortify sealant; D005899:Glass Ionomer Cements; D008689:Methacrylates; D019279:Resin Cements; C425844:Scotchbond Multi-Purpose Plus; C407604:Solid Bond; C113049:Solitaire composite resin; C403634:Stae bonding agent; C083568:Z100 composite resin; C115612:single bond; D017438:Bisphenol A-Glycidyl Methacrylate; D012822:Silicon Dioxide; D015040:Zirconium; D008751:Methylene Blue