The Effect of Colloidal Silica and Glaze Coatings on the Adhesion of Zirconia with Various Ytrria Concentration.

Autor:	Villanova M; Program in Dentistry, Veiga de Almeida University (UVA). Rio de Janeiro, RJ, Brazil., Carvalho Prado M; Department of Restorative Dentistry, Endodontic Division, State University of Campinas- UNICAMP, Piracicaba, SP, Brazil., Neves Y; Program in Dentistry, Veiga de Almeida University (UVA). Rio de Janeiro, RJ, Brazil., Annese E; National Institute of Metrology Quality and Technology (INMETRO), Materials Metrology Division (DIMAT), Duque de Caxias, RJ, Brazil., Archanjo B; National Institute of Metrology Quality and Technology (INMETRO), Materials Metrology Division (DIMAT), Duque de Caxias, RJ, Brazil., Simão R; Metallurgical and Materials Engineering Department, Federal University of Rio de Janeiro (COPPE-UFRJ), Rio de Janeiro, RJ, Brazil., Dos Santos HE; Program in Dentistry, Veiga de Almeida University (UVA). Rio de Janeiro, RJ, Brazil., Prado M; Program in Dentistry, Veiga de Almeida University (UVA). Rio de Janeiro, RJ, Brazil.
Jazyk:	angličtina
Zdroj:	The European journal of prosthodontics and restorative dentistry [Eur J Prosthodont Restor Dent] 2023 Nov 30; Vol. 31 (4), pp. 346-357. Date of Electronic Publication: 2023 Nov 30.
DOI:	10.1922/EJPRD_2491Villanova12
Abstrakt:	Purpose: This study evaluated the effect of coating traditional and translucent Y-TZP with an industrial nanometric colloidal silica or glaze before or after sintering on the adhesion of zirconia with various ytrria concentration. Materials and Methods: Specimens of Y-TZP with 3% and 5% yttria were subdivided into 5 groups (n=10), according to the coating applied and moment of application (before or after Y-TZP sintering): Control (no coating), Colloidal Silica/Sintering, Sintering/Colloidal Silica, Glaze/Sintering, Sintering/ Glaze. Lithium disilicate (LD) was used as positive control. Except for Y-TZP controls, groups were conditioned with silane before cementation with a self-adhesive resin cement. After 24 hours, the shear bond strength and failure analysis were performed. Also, analysis of specimens' surface was accomplished with SEM-EDX. Kruskal-Wallis and Dunn tests were applied to analyze differences between groups (p⟨0.05). Results: Overall, the worst and best values of shear bond strength test were control and glaze after sintering groups. Different morphological and chemical aspects were observed in SEM-EDX analysis. Conclusions: Coating Y-TZP with colloidal silica showed unsatisfactory results. In 3Y-TZP, the surface treatment associated with the best adhesion values was the application of glaze after zirconia sintering. However, in 5Y-TZP, glaze application can be performed before or after the zirconia sintering to optimize clinical steps. (Copyright© 2023 Dennis Barber Ltd.)
Databáze:	MEDLINE
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