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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Strengthening ceramic surfaces with the use of resin cements based on thiourethane oligomers

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Autor(es):
Correr-Sobrinho, Lourenco [1] ; Costa, Ana R. [1] ; Fugolin, Ana P. [2] ; Borges, Lincoln P. S. [1] ; Ferracane, Jack L. [2] ; Pfeifer, Carmem S. [2, 1]
Número total de Autores: 6
Afiliação do(s) autor(es):
[1] Univ Estadual Campinas, Piracicaba Sch Dent, Dept Dent Mat, Piracicaba, SP - Brazil
[2] Oregon Hlth & Sci Univ, Sch Dent Biomat & Biomech, Portland, OR 97201 - USA
Número total de Afiliações: 2
Tipo de documento: Artigo Científico
Fonte: Journal of Applied Polymer Science; v. 137, n. 35 JAN 2020.
Citações Web of Science: 0
Resumo

This study evaluated the effects of thiourethane (TU) additives on the flexural strength (sigma(f)) and elastic modulus (E-f) of a resin cement, and on a possible strengthening of ceramic restorations. Methods Two TUs (ARomatic and ALiphatic) were added at 0 (control-EC) or 20 wt% to photopolymerizable resin cements. RelyX Ultimate (RU) was the commercial control. Flexural strength (sigma(f)) and elastic modulus (E-f) of the cements were measured in three-point bending (n = 8). Biaxial flexural strength (sigma(bf)) of ceramic discs with and without cement layering were determined using a ball-on-ring setup. The sigma(bf) of cement-coated specimens was calculated at positions z = 0 (ceramic surface, bonded interface) and z = -t(2) (cement surface above ring). Data were analyzed with one-way ANOVA/Tukey test (alpha = .05). Results sigma f of AR was significantly higher than for AL and RU, and E-f was lower. The E-f of RU was significantly higher than all other groups. At z = 0, all resin-coated groups had higher sigma(bf). The sigma(bf) of RU, AR, and AL were significantly higher than EC and unfilled resin group. At z = -t(2), RU had significantly higher sigma(bf). Significance All resin cements were able to strengthen the ceramic, with the TU-modified material presenting similar results to the commercial material. (AU)

Processo FAPESP: 16/03576-9 - Efeito de cimentos resinosos experimentais formulados a partir de oligômeros tiouretanos na resistência à flexão, ciclagem térmica e fadiga da cerâmica odontológica submetida à condicionante
Beneficiário:Lourenço Correr Sobrinho
Linha de fomento: Bolsas no Exterior - Pesquisa