title: The effect of different light sources on microleakage of bleached enamel.
abstract: This study evaluated the immediate effects of halogen, LED (light-emitting diode), and plasma are curing units on microleakage of bleached enamel. The buccal and lingual enamel surfaces of experimental groups (n=30) were bleached with 16% carbamide peroxide for a period of 10 days, with a daily contact time of 90 minutes. Box-shaped Class V cavities were also prepared on 60 extracted molar teeth (n=30, control group). For all groups, a composite resin (Grandio) was bonded with one of the two employed adhesive systems, Single Bond 2 or Prime & Bond NT. After restoration, all specimens were thermocycled for 200 cycles between 5 degrees C and 55 degrees C with a dwell time of 60 seconds in each bath, and then exposed to a dye. In the control groups, microleakage was statistically lower than the bleached groups (p<0.01). Groups cured with QTH and PAC showed no statistical differences (p>0.05). However, groups cured with LED system showed statistically significant differences (p<0.01) in microleakage.
authors.affiliation: Department of Operative Dentistry, Ondokuz Mayis University, Faculty of Dentistry, Samsun, Turkey. bbulucu@omu.edu.tr
authors.forename: Bilinç
authors.initials: B
authors.lastname: Bulucu
authors.forename: Ebru
authors.initials: E
authors.lastname: Ozsezer
authors.forename: Ertan
authors.initials: E
authors.lastname: Ertaş
authors.forename: Gözde
authors.initials: G
authors.lastname: Yüksel
mesh_terms: D003188:Composite Resins / Q000528:radiation effects*; D001840:Dental Bonding / Q000379:methods; D003731:Dental Caries / Q000150:complications / Q000628:therapy; D003737:Dental Cavity Preparation / Q000379:methods; D003743:Dental Enamel / Q000528:radiation effects*; D003763:Dental Leakage / Q000209:etiology / Q000517:prevention & control*; D018772:Dental Marginal Adaptation; D006801:Humans; D008027:Light; D008029:Lighting / Q000295:instrumentation*; D018709:Statistics, Nonparametric; D013997:Time Factors; D014073:Tooth Bleaching / Q000009:adverse effects*
chemical_list: D003188:Composite Resins