Journal article
Surface Treatments for Repair of Feldspathic, Leucite - and Lithium Disilicate-Reinforced Glass Ceramics Using Composite Resin
Brazilian Dental Journal, Vol.26(2), pp.152-155
04/01/2015
DOI: 10.1590/0103-6440201302447
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 mm2 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.
Details
- Title: Subtitle
- Surface Treatments for Repair of Feldspathic, Leucite - and Lithium Disilicate-Reinforced Glass Ceramics Using Composite Resin
- Creators
- Christian Alencar Neis - Faculdade MeridionalNadine Luísa Guimarães Albuquerque - Universidade Federal do CearáIvo de Souza Albuquerque - Universidade Federal do CearáErica Alves Gomes - Faculdade MeridionalCelso Bernardo de Souza-Filho - Faculdade MeridionalVictor Pinheiro Feitosa - Universidade Federal do CearáAloisio Oro Spazzin - Faculdade MeridionalAtais Bacchi - Faculdade MeridionalVictor Pinheiro Feitosa - Operative Dentistry
- Resource Type
- Journal article
- Publication Details
- Brazilian Dental Journal, Vol.26(2), pp.152-155
- Publisher
- Fundação Odontológica de Ribeirão Preto
- DOI
- 10.1590/0103-6440201302447
- ISSN
- 1806-4760
- eISSN
- 1806-4760
- Language
- Portuguese
- Date published
- 04/01/2015
- Academic Unit
- Operative Dentistry
- Record Identifier
- 9984655346702771
Metrics
1 Record Views