de Cássia Papaiz Gonçalves Fernanda, Bottino Marco Antonio, Marques de Melo Renata Marinho, Assunção Souza Rodrigo Othavio
J Adhes Dent. 2015 Aug;17(4):307-12. doi: 10.3290/j.jad.a34557.
To evaluate the influence of different processing techniques, ceramic thicknesses, and cooling rate protocols on the μTBS of a veneering ceramic to zirconia (Y-TZP).
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° 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°C/s]; F: fast [50°C/s]). The Y-TZP/veneering ceramic blocks were sectioned to produce non-trimmed bar specimens (bonded area: 1±0.1 mm2), which were submitted to 1200 thermal cycles (5°C and 55°C, 30-s dwell time) and stored for 1 week in distilled water (37°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.
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.
Layered application of a thin veneering ceramic using a fast cooling rate resulted in improved bonding between veneering ceramic and zirconia.
评估不同加工工艺、陶瓷厚度和冷却速率方案对饰面陶瓷与氧化锆（Y-TZP）之间微拉伸粘结强度（μTBS）的影响。
获取80个尺寸为10×7×5mm的Y-TZP陶瓷块（VITA In-Ceram 2000）。这些陶瓷块在特殊炉中于1500°烧结2小时，进行湿磨，并根据“加工工艺”（P：压制/饰面陶瓷PM9；或V：分层/饰面陶瓷VM9）、“厚度”（2mm和4mm）和“冷却方案”（S：慢速[10°C/s]；F：快速[50°C/s]）因素分为8组。将Y-TZP/饰面陶瓷块切割成未修整的条形试样（粘结面积：1±0.1mm²），使其经受1200次热循环（5°C和55°C，保压时间30秒），并在37°C的蒸馏水中储存1周，然后在万能试验机（EMIC，1mm/min）上进行微拉伸测试。以MPa为单位的数据使用三因素方差分析和Tukey检验进行统计分析。
方差分析显示，只有加工工艺因素具有显著性（p = 0.015），与厚度因素（p = 0.111）和冷却方案因素（p = 0.202）不同。大多数失效被归类为粘结性失效。
采用快速冷却速率分层应用薄饰面陶瓷可改善饰面陶瓷与氧化锆之间的粘结。
