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Neis CA, Albuquerque NLG, Albuquerque IDS, Gomes EA, Souza-Filho CBD, Feitosa VP, Spazzin AO, Bacchi A. Surface treatments for repair of feldspathic, leucite - and lithium disilicate-reinforced glass ceramics using composite resin. Braz Dent J 2015; 26:152-5. [PMID: 25831106 DOI: 10.1590/0103-6440201302447] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2014] [Accepted: 10/28/2014] [Indexed: 11/22/2022] Open
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.
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Affiliation(s)
- Christian Alencar Neis
- Department of Prosthodontics and Dental Materials, School of Dentistry, IMED - Meridional University, Passo Fundo, RS, Brazil
| | - Nadine Luísa Guimarães Albuquerque
- Dentistry and Nursing, Department of Restorative Dentistry, School of Pharmacy, UFC - Federal University of Ceará, Fortaleza, CE, Brazil
| | - Ivo de Souza Albuquerque
- Dentistry and Nursing, Department of Restorative Dentistry, School of Pharmacy, UFC - Federal University of Ceará, Fortaleza, CE, Brazil
| | - Erica Alves Gomes
- Department of Prosthodontics and Dental Materials, School of Dentistry, IMED - Meridional University, Passo Fundo, RS, Brazil
| | - Celso Bernardo de Souza-Filho
- Department of Prosthodontics and Dental Materials, School of Dentistry, IMED - Meridional University, Passo Fundo, RS, Brazil
| | - Victor Pinheiro Feitosa
- Dentistry and Nursing, Department of Restorative Dentistry, School of Pharmacy, UFC - Federal University of Ceará, Fortaleza, CE, Brazil
| | - Aloisio Oro Spazzin
- Department of Prosthodontics and Dental Materials, School of Dentistry, IMED - Meridional University, Passo Fundo, RS, Brazil
| | - Atais Bacchi
- Department of Prosthodontics and Dental Materials, School of Dentistry, IMED - Meridional University, Passo Fundo, RS, Brazil
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