Cleaning and Surface Treatment Protocols for Repair of Aged Y-TZP with Composite Resin

• Autor(a) principal: Barchetta, Nayara Fernanda [UNESP]
• Data de Publicação: 2021
• Outros Autores: Silva, Ana Carolina [UNESP], Domingues, Nadia [UNESP], Braga Pereira, Sarina Maciel [UNESP], Bottino, Marco Antonio [UNESP], Ferreira Anzaloni Saavedra, Guilherme de Siqueira [UNESP], Melo, Renata Marques de [UNESP], Assuncao e Souza, Rodrigo Othavio de
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.11607/prd.4915; http://hdl.handle.net/11449/209998

The purpose of this study was to evaluate the cleaning and surface treatment techniques in the repair of aged and contaminated yttrium oxide-stabilized tetragonal polycrystalline zirconia (Y-TZP). From a total of 80 specimens of Y-JZP, 60 were subjected to aging simulation in a buccal environment with degradation in an autodave for 24 hours (127 degrees C/1.5 bar) and contaminated with Streptococcus mutans. The surfaces were cleaned with a triple syringe (air/water jet; n = 20) or isopropyl alcohol (n = 20), or by prophylaxis (n = 20) with pumice and water. The remaining 20 specimens comprised the control group. All specimens were then treated with silicatization (n = 10 per group) or adhesive (n = 10 per group) and repaired with composite resin. Analyses of shear strength, failure mode, and roughness were performed by electron microscopy. Data were analyzed by two-way analysis of variance (ANOVA) and t test (alpha = .05). Statistical significance was set at P < .05. Two-way ANOVA was significant for aging and surface treatments (P = .049), but was not significant for surface cleaning (P = .05). ANOVA results were statistically significant for surface treatments (P < .0001), with higher resistance for the silicatization groups. The failure mode was mostly adhesive for all specimens. The roughness was not significant for aging and control groups (P > .05). Triple-syringe and prophylaxis cleansing followed by silicatization was the most efficient treatment for the repair of aged and contaminated Y-TZP. There is reduced repair efficiency with the aging of Y-TZP.