Fracture resistance of bleached teeth restored with different procedures

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Data

2012-08-01

Autores

Bandeca, Matheus Coelho [UNESP]
Pinto, Shelon Cristina Souza [UNESP]
Calixto, Luiz Rafael [UNESP]
Saad, José Roberto Cury [UNESP]
Barros, Érico Luiz Damasceno
El-Mowafy, Omar
Porto Neto, Sizenando de Toledo [UNESP]

Título da Revista

ISSN da Revista

Título de Volume

Editor

ABM, ABC, ABPol

Resumo

This study evaluated the fracture resistance of teeth submitted to internal bleaching and restored with different non-metallic post. Eighty mandibular incisors were endodontically treated and randomly divided in 10 groups (n = 8): G1- restored with composite resin (CR), G2- CR + fiber-reinforced composite post (FRC, Everstick post, Sticktech) cemented with resin cement self-etch adhesive (RCS, Panavia F 2.0, Kuraray), G3- CR + FRC + self-adhesive resin cement (SRC, Breeze, Pentral Clinical), G4- CR+ glass fiber post (GF, Exacto Post, Angelus) + RCS, G5- CR + GF + SRC. The G6 to G10 were bleached with hydrogen peroxide (HP) and restored with the same restorative procedures used for G1 to G5, respectively. After 7 days storage in artificial saliva, the specimens were submitted to the compressive strength test (N) at 0.5 mm/min cross-head speed and the failure pattern was identified as either reparable (failure showed until 2 mm below the cement-enamel junction) or irreparable (the failure showed <2 mm or more below the cement-enamel). Data were analyzed by ANOVA and Tukey test (α = 0.05). No significant difference (p < 0.05) was found among G1 to G10. The results suggest that intracoronal bleaching did not significantly weaken the teeth and the failure patterns were predominately reparable for all groups. The non-metallic posts in these teeth did not improve fracture resistance.

Descrição

Palavras-chave

dental bleaching, fracture resistance, fiber posts, composite resin

Como citar

Materials Research. ABM, ABC, ABPol, v. 15, n. 4, p. 500-505, 2012.