Influence of different laser irradiation energy on ceramic bond strength

International Journal of Development Research

Article ID: 
5 pages
Research Article

Influence of different laser irradiation energy on ceramic bond strength

Danilo de S. Andrade, Fernanda A. Feitosa, Rodrigo M. de Araújo, Pablo L. Benitez, César R. Pucci


Objective: This study aimed to verify the influence of differentsNd:YAG laser energy parameters on the bond strength between lithium disilicate ceramic and resin cement. Methods: One hundred Lithium disilicate ceramic specimens with truncated cones shape were prepared and divided into 5 groups (n=10): 1- Control(without laser irradiation); 2- 80Nd – laser irradiation with Nd:YAG laser at 80mJ energy intensity for 1 min; 3- 100Nd - irradiation with Nd:YAG laser with an intensity of 100 mJ for 1 min; 4- 120Nd - Nd:YAG laser irradiation at 120mJ energy intensity parameters for 1 min; 5- 140Nd - Nd: YAG laser irradiation at 140mJ energy intensity parameters for 1 min. The laser irradiation on the specimen was performed in lower base of thetruncated cones shape. After all lasers treatments the groups were etched with hydrofluoric acid at 10% for 1 minute and silanized. Half of the treated ceramic specimens were cemented with resin cement (Variolink II-Ivoclar-Vivadent) to the other half resultingin hourglasses-shaped specimens.The bonded specimens were cycled thermomechanicallyand stressed to failure under tension.Data were analyzed using ANOVA and Tukey tests (α=0.05). Results: One-way ANOVAindicated that the factor “laser energy”,statistically significant differences were observed among groups (p= 0.0), The 80Nd group (21.22 ± 6.00) showed greater results means than the other groups (Control-12.37 ± 3.46; 100Nd-15.15 ± 5.89; 120Nd-14.61 ± 2.53; 140Nd-10.12 ± 4.23)(Results in MPa). The other groups, including the control, were not statistically different. Conclusions: Laser energy intensity parameter significantly affected tensile strength of the resin cement to the lithium disilicate ceramic.

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