TY - JOUR
T1 - Effect of photoactivation systems and resin composites on the microleakage of esthetic restorations
AU - Cavalcante, Larissa Maria Assad
AU - Peris, Alessandra Resende
AU - Ambrosano, Gláucia Maria Bovi
AU - Ritter, André Vicente
AU - Pimenta, Luiz André Freire
PY - 2007/2/1
Y1 - 2007/2/1
N2 - Aim: The aim of this study was to evaluate the influence of four photoactivation systems [quartz tungsten halogen (QTH), light-emitting diode (LED), argon ion laser (AL), and plasma arc curing PAC)] on cementum/dentin and enamel microleakage of Class II restorations using a microhybrid [Z250 - 3M ESPE] and two packable composites [(SureFil - Dentsply and Tetric Ceram HB - Ivoclair/Vivadent]. Methods and Materials: Three hundred sixty "vertical-slot Class II cavities" were prepared at the mesial surface of bovine incisors using a 245 carbide bur in a highspeed handpiece. Specimens were divided into twelve groups (composite-photoactivation systems). Half of the specimens had the gingival margin placed in enamel (n=15) and the other half in cementum/dentin (n=15). Composites were inserted and cured in 2 mm increments according to manufacturers' recommended exposure times. After polishing, the samples were immersed in 2% methylene blue solution, sectioned, and evaluated at the gingival margins. Data were submitted to statistical analysis using the Kruskal-Wallis and Mann-Whitney tests. Results: No significant differences were found among the photoactivation systems and among resin composites (p>0.05). Microleakage was not significantly affected by location (enamel vs. cementum/dentin, p>0.05). These findings suggested neither the photoactivation systems nor the resin composite types might have an effect on the microleakage at gingival margins Class II cavities.
AB - Aim: The aim of this study was to evaluate the influence of four photoactivation systems [quartz tungsten halogen (QTH), light-emitting diode (LED), argon ion laser (AL), and plasma arc curing PAC)] on cementum/dentin and enamel microleakage of Class II restorations using a microhybrid [Z250 - 3M ESPE] and two packable composites [(SureFil - Dentsply and Tetric Ceram HB - Ivoclair/Vivadent]. Methods and Materials: Three hundred sixty "vertical-slot Class II cavities" were prepared at the mesial surface of bovine incisors using a 245 carbide bur in a highspeed handpiece. Specimens were divided into twelve groups (composite-photoactivation systems). Half of the specimens had the gingival margin placed in enamel (n=15) and the other half in cementum/dentin (n=15). Composites were inserted and cured in 2 mm increments according to manufacturers' recommended exposure times. After polishing, the samples were immersed in 2% methylene blue solution, sectioned, and evaluated at the gingival margins. Data were submitted to statistical analysis using the Kruskal-Wallis and Mann-Whitney tests. Results: No significant differences were found among the photoactivation systems and among resin composites (p>0.05). Microleakage was not significantly affected by location (enamel vs. cementum/dentin, p>0.05). These findings suggested neither the photoactivation systems nor the resin composite types might have an effect on the microleakage at gingival margins Class II cavities.
KW - Marginal sealing
KW - Microleakage
KW - Packable resin composites
KW - Photoactivation system
KW - Resin composite
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M3 - Article
C2 - 17277829
AN - SCOPUS:33846896201
SN - 1526-3711
VL - 8
SP - 70
EP - 79
JO - Journal of Contemporary Dental Practice
JF - Journal of Contemporary Dental Practice
IS - 2
ER -