Resumo

NARANJO-PIZANO, Rafael Mauricio et al. Difference in hardness of composites polimerized with differnt types of lights. CES odontol. [online]. 2017, vol.30, n.1, pp.3-16. ISSN 0120-971X.

Abstract Introduction and objective: When using direct composites is important to take into account the specific characteristics of the material and the instruments like the curing lamp used to built any kind of restoration with composite. Create scientific evidence so professionals can choose the type of lamp, composite, and the needed technique to provide a better clinical result. Materials and methods: 10 samples were made in 24 groups, which evaluated 3 types of lamps: (Optilux® 501 - halogen at full power), (Optilux® 501 - halogen ramp) and (Bluephase® - LED), with 4 types of resins: Filtek® Supreme XT, Filtek® Z350, Tetric® N Ceram and Esthet ®X, and 2 placement techniques: incremental and block. The Vickers hardness by penetration at the surface and deep of each sample was evaluated. The results were analyzed both bi-and multivariate. Results: Filtek® Supreme XT showed the highest hardness, followed by Filtek® Z350, Tetric® N Ceram and Esthet® X. The hardness was dependent on the lamp; the values were higher with Optilux® 501 with ramp, followed by Optilux® 501 at full power and finally LED Bluephase®. Better results were obtained using the technique of incremental placement compared with the block one, and these were higher in the surface region compared to deep region. Conclusion: The highest hardness was obtained with resin Filtek® Supreme XT, using the lamp Optilux® 501 with ramp and positioned with an incremental technique.

Palavras-chave : Filtek Supreme XT; Z350, Tetric Ceram N; Esthet X; curing; Vickers.

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