Dental Biomaterials Research Chair, College of Applied Medical Sciences, King Saud University.
Community Health Department, College of Applied Medical Sciences, King Saud University.
Dent Mater J. 2019 Jun 1;38(3):388-395. doi: 10.4012/dmj.2018-137. Epub 2019 Mar 13.
This study analyzed the effect of grit blasting pressures on resin cement to zirconia (ZrO) adhesion using enclosed mold shear bond test (EM-SBS). ZrO blanks were pre-treated with Rocatec Soft as follows: group 1: control, group 2: specimens treated at 80 kPa, group 3: at 180 kPa, group 4: at 280 kPa, and group 5: at 380 kPa. Monobond N and Multilink Speed were used as the silane and resin cement, respectively. Next, the blanks were assigned into three sub-groups (n=8, N=108) according to storage conditions. A non-linear relation was observed between EM-SBS and contact angle versus grit blasting pressure (r=-0.542, p=0.01). According to ANOVA (p<0.05), the EM-SBS values with both 180 kPa (17.4±6.7 MPa) and 280 kPa (19.4±4.8 MPa) were statistically higher after 12,000 thermo-cycles. Relatively equal thermo-cycled bond strength might also be achieved with intermediate (180 kPa) grit blasting pressure instead of the recommended 280 kPa.
本研究采用封闭式模具剪切结合试验（EM-SBS）分析了喷砂压力对树脂水泥与氧化锆（ZrO）粘结的影响。ZrO 坯料用 Rocatec Soft 进行预处理如下：第 1 组：对照，第 2 组：80kPa 处理的样品，第 3 组：180kPa，第 4 组：280kPa，第 5 组：380kPa。Monobond N 和 Multilink Speed 分别用作硅烷和树脂水泥。然后，根据储存条件将坯料分为三组（n=8，N=108）。EM-SBS 与接触角与喷砂压力之间观察到非线性关系（r=-0.542，p=0.01）。根据方差分析（p<0.05），在 12000 次热循环后，180kPa（17.4±6.7 MPa）和 280kPa（19.4±4.8 MPa）的 EM-SBS 值均具有统计学意义。使用中等（180kPa）喷砂压力而不是推荐的 280kPa 也可能实现相对相等的热循环粘结强度。
