title: Effect of thermal cycling on microleakage of a fissure sealant polymerized with different light sources.
abstract: The purpose of this study was to examine the effect of thermal cycling on microleakage of a fissure sealant after it was bonded with different bonding agents and polymerized with different light curing units. To this end, two bonding agents (Xeno III, iBond), three light curing units (Astralis 3, Elipar free-light, Elipar free-light 2), and a fissure sealant (Fissurit FX) were used. Microleakage was then evaluated using a dye penetration method after thermal cycling. When the fissure sealant was polymerized with Elipar free-light and Elipar free-light 2, microleakage at 10,000 cycles was significantly increased compared with that at 5,000 cycles. In terms of comparison among the curing units, the best microleakage score was observed with Astralis 3 (p<0.05). In terms of comparison between the two bonding agents, no significant differences in microleakage score were observed (p>0.05). Further, it was concluded that in order to evaluate microleakage scores appropriately, it was necessary for specimens to be subjected to thermocycling of 10,000 times or more.
authors.affiliation: Department of Pedodontics, Faculty of Dentistry, Ondokuz Mayis University, 55139 Kurupelit, Samsun, Turkey. ekoyuturk2000@yahoo.com
authors.forename: Alp Erdin
authors.initials: AE
authors.lastname: Koyuturk
authors.forename: Taner
authors.initials: T
authors.lastname: Akca
authors.forename: Ali Cagin
authors.initials: AC
authors.lastname: Yucel
authors.forename: Cemal
authors.initials: C
authors.lastname: Yesilyurt
mesh_terms: D001840:Dental Bonding; D003763:Dental Leakage / Q000175:diagnosis / Q000517:prevention & control; D003799:Dental Stress Analysis; D017220:Dentin-Bonding Agents; D006358:Hot Temperature; D006801:Humans; D008027:Light; D008422:Materials Testing; D008689:Methacrylates; D008964:Molar, Third; D044367:Phase Transition; D010895:Pit and Fissure Sealants; D019279:Resin Cements; D018709:Statistics, Nonparametric
chemical_list: D017220:Dentin-Bonding Agents; C407603:Fissurit F; D008689:Methacrylates; D010895:Pit and Fissure Sealants; D019279:Resin Cements; C487957:Xeno III; C477386:iBond