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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Effect of Thickness, Processing Technique and Cooling Rate Protocol on the mu TBS of a Bilayer Ceramic System

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Author(s):
Papaiz Goncalves, Fernanda de Cassia [1] ; Antonio Bottino, Marco [1] ; Marques de Melo, Renata Marinho [1] ; Assunao Souza, Rodrigo Othavio [2]
Total Authors: 4
Affiliation:
[1] UNESP, Sao Paulo State Univ, Dept Dent Mat & Prosthodont, Sao Jose Dos Campos, SP - Brazil
[2] Univ Fed Rio Grande Norte UFRN, Dept Dent, Div Prosthodont, Natal, RN - Brazil
Total Affiliations: 2
Document type: Journal article
Source: Journal of Adhesive Dentistry; v. 17, n. 4, p. 307-312, 2015.
Web of Science Citations: 0
Abstract

Purpose: To evaluate the influence of different processing techniques, ceramic thicknesses, and cooling rate protocols on the mu TBS of a veneering ceramic to zirconia (Y-TZP). Materials and Methods: Eighty Y-TZP ceramic blocks (VITA In-Ceram 2000) with dimensions of 10 x 7 x 5 mm were obtained. The blocks were sintered in a special furnace at 1500 degrees for 2 h, wet ground, and divided into 8 groups according to the factors ``processing technique{''} (P:pressed/veneering ceramic PM9; or V: layered/veneering ceramic VM9), ``thickness{''} (2 mm and 4 mm), and ``cooling protocol{''} (S: slow {[}10 degrees C/s]; F: fast {[}50 degrees C/s]). The Y-TZP/veneering ceramic blocks were sectioned to produce non-trimmed bar specimens (bonded area: 1 +/- 0.1 mm(2)), which were submitted to 1200 thermal cycles (5 degrees C and 55 degrees C, 30-s dwell time) and stored for 1 week in distilled water (37 degrees C) before microtensile testing in a universal test machine (EMIC, 1 mm/min). The data in MPa were analyzed statistically using three-way ANOVA and Tukey's test. Results: ANOVA revealed that only the factor processing technique was significant (p = 0.015), unlike the factors thickness (p = 0.111) and cooling protocol (p = 0.202). The majority of the failures were classified as adhesive. Conclusion: Layered application of a thin veneering ceramic using a fast cooling rate resulted in improved bonding between veneering ceramic and zirconia. (AU)

FAPESP's process: 11/12187-2 - Evaluation of the effect of thickness, technique of application and cooling protocol of veneering ceramics in the fracture resistance and microtensile bond strength of Y-TZP ceramic
Grantee:Marco Antonio Bottino
Support Opportunities: Regular Research Grants