Influence Of Different Bleaching Systems On The Bond Strength Of Laminate Veneer To Enamel
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Date
2018-04
Journal Title
Journal ISSN
Volume Title
Publisher
Sumathi Publications
Abstract
Purpose:The objective of this in-vitro study was to examine the microtensile bond strength of a porcelain laminate veneer (PLV) to tooth surface bleached with photoactivation by blue light-emitting diode (LED) or diode laser. Methods:Eigthteen extracted human central incisors were randomly divided into three groups. Two sticks were obtained from each tooth (n=12). Before surface treatments; teeth were prepared to provide space for PLVs. The first group teeth were bleached with Whiteness HP which is contain 35% hydrogen peroxide (HP) and then photoactivated with a LED for 20 seconds. The second group were bleached with Laserwhite 20 which is contain 46% HP and photoactivated with a diode laser for 30 seconds. The third group received no surface treatment and served as the control group. IPS Esthetic ceramic veneers were luted with Variolink II veneer cement . The teeth were sectioned to obtain porcelain-resin-enamel/dentin sticks and submitted to a MTB testing device. The maximum load at fracture was recorded. Data were analyzed using one-way ANOVA followed by the Tukey HSD post-hoc test at a preset α of 0.05. Results:One-way ANOVA revealed that there was significant difference between LED unit group and control group (p<.05) but no statistical differences were observed with diode laser group (p>.05) The LED unit group presented significantly lower bond strength value (6.49±2.3 MPa) than diode laser (8.49±3.1 MPa) and control groups (9.53±2.7 MPa). Conclusion:The results suggested that bleaching therapy with activation by LED or diode laser reduced the bond strength of IPS Esthetic ceramic veneers to tooth surfaces.
Description
Keywords
Teeth Bleaching, Photoactivation, Semiconductor lasers, Diode laser, Microtensile.
Citation
Ozgun Yusuf Ozyilmaz, Filiz Aykent, Ali Riza Tuncdemir, Haluk Baris Kara. Influence Of Different Bleaching Systems On The Bond Strength Of Laminate Veneer To Enamel. International Journal of Clinical and Biomedical Research. 2018 Apr; 4(2): 1-6