Use este identificador para citar ou linkar para este item: http://www.repositorio.ufc.br/handle/riufc/18106
Título: Surface treatments for repair of feldspathic, leucite- and lithium disilicate-reinforced glass ceramics using composite resin
Autor(es): Neis, Christian Alencar
Albuquerque, Nadine Luísa Guimarães
Albuquerque, Ivo de Souza
Gomes, Erica Alves
Souza-Filho, Celso Bernardo de
Feitosa, Victor Pinheiro
Spazzin, Aloisio Oro
Bacchi, Atais
Palavras-chave: Cerâmica
Ácido Fluorídrico
Data do documento: 2015
Editor: Brazilian Dental Journa
Citação: NEIS, C. A. ; ALBUQUERQUE, N. L. G. ; ALBUQUERQUE, I. S. ; GOMES, E. A. ; SOUZA-FILHO, C. B. ; FEITOSA, V. P. ; SPAZZIN, A. O. ; BACCHI, A. (2015)
Abstract: The aim of this study was to evaluate the efficacy of different surface conditioning methods on the microtensile bond strength of a restorative composite repair in three types of dental ceramics: lithium disilicate-reinforced, leucite-reinforced and feldspathic. Twelve blocks were sintered for each type of ceramic (n=3) and stored for 3 months in distilled water at 37 °C. The bonding surface of ceramics was abraded with 600-grit SiC paper. Surface treatments for each ceramic were: GC (control) - none; GDB - diamond bur #30 μm; GHF - hydrofluoric acid (10%); GT- tribochemical silica coating (45-μm size particles). Treatments were followed by cleaning with phosphoric acid 37% for 20 s + silane + adhesive. The composite resin was used as restorative material. After repair, samples were subjected to thermocycled ageing (10,000 cycles between 5 °C and 55 °C for 30 s). Thereafter, the samples were sectioned into 1.0 mm 2 sticks and tested for microtensile bond strength with 0.5 mm/min crosshead speed. Data were compared by two-way ANOVA and Tukey’s test ( α =0.05). The superficial wear with diamond bur proved to be suitable for feldspathic porcelain and for leucite-reinforced glass ceramic while hydrofluoric acid-etching is indicated for repairs in lithium disilicate-reinforced ceramic; tribochemical silica coating is applicable to leucite-reinforced ceramic. Predominance of adhesive failures was observed (>85% in all groups). In conclusion, the success of surface treatments depends on the type of ceramic to be repaired.
Descrição: NEIS, Christian Alencar et al. Surface treatments for repair of feldspathic, leucite- and lithium disilicate-reinforced glass ceramics using composite resin. Brazilian Dental Journal, Ribeirão Preto, v. 26, n. 2, p. 152-155, 2015.
URI: http://www.repositorio.ufc.br/handle/riufc/18106
ISSN: Print version 0103-6440
On-line 1806-4760
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