Universidade Federal do Rio Grande do Norte (UFRN), Departamento de Odontologia, Natal / RN, Brasil.
Universidade Federal de Juiz de Fora (UFJF), Departamento de Odontologia, Juiz de Fora, MG, Brasil.
J Appl Oral Sci. 2020 Nov 27;28:e20200122. doi: 10.1590/1678-7757-2020-0122. eCollection 2020.
This paper aims to evaluate the effect of different surface treatments on surface topography, wettability, and shear bond strength of resin cement to glass ceramic. For SBS test, 32 blocks (7x7x2 mm) of lithium disilicate were obtained and randomly divided into eight groups (four blocks per group) according to each surface treatment (HF 20 s, 60 s, 120 s + silanization/S or Scotch Bond Universal/ SBU) and the Monobond Etch & Prime - MEP application followed or not by SBU. On each treated surface ceramic block, up to four dual-curing resin cement cylinders were prepared and light-cured for 40s (N=120/n=15). The specimens were thermocycled (10,000 cycles, 5-55°C, 30 s) and the SBS test (50KgF, 0.5 mm/min) was performed. Furthermore, failure analysis, wettability, AFM, and SEM were carried out. SBS data (MPa) were analyzed using Student's t-test, two-way ANOVA, Tukey's test (5%) and Weibull's analysis.
For HF experimental groups, two-way ANOVA presented the factors "etching time" and "bonding agent" as significant (p<0.05). After silane application, the HF groups presented similar bond strength. SBU application compromised the SBS, except for 120s etching time (HF120sS: 23.39ᵃ±6.48 MPa; HF120sSBU: 18.76ᵃ±8.81MPa). For MEP groups, SBU application did not significantly affect the results (p=0.41). The MEP group presented the highest Weibull modulus (4.08A) and they were statistically different exclusively from the HF20sSBU (0.58B).
The HF 20s, 60s, 120 s followed by silane, promoted similar resin-bond strength to ceramic and the SBU application after HF or MEP did not increase the SBS.
本文旨在评估不同表面处理对玻璃陶瓷的表面形貌、润湿性和树脂水门汀剪切粘结强度的影响。SBS 测试中，获得了 32 块（7x7x2mm）锂硅玻璃陶瓷，并根据每种表面处理（HF 20s、60s、120s+硅烷化/S 或 Scotch Bond Universal/SBU）和随后是否应用 Monobond Etch & Prime-MEP 将其随机分为八组（每组四个块）。在每个处理过的陶瓷块表面，制备多达四个双固化树脂水泥圆柱体并进行 40s 光固化（N=120/n=15）。将试件进行热循环（10000 次，5-55°C，30s），然后进行 SBS 测试（50kgf，0.5mm/min）。此外，还进行了失效分析、润湿性、AFM 和 SEM 分析。使用学生 t 检验、双因素方差分析、Tukey 检验（5%）和威布尔分析对 SBS 数据（MPa）进行分析。
对于 HF 实验组，双因素方差分析显示“蚀刻时间”和“粘结剂”两个因素具有显著性差异（p<0.05）。应用硅烷后，HF 组的粘结强度相似。SBU 的应用降低了 SBS，除了 120s 蚀刻时间（HF120sS：23.39ᵃ±6.48MPa；HF120sSBU：18.76ᵃ±8.81MPa）。对于 MEP 组，SBU 的应用对结果没有显著影响（p=0.41）。MEP 组的威布尔模数最高（4.08A），与 HF20sSBU 组（0.58B）相比，差异具有统计学意义。
HF 20s、60s、120s 后硅烷处理可促进树脂与陶瓷的粘结强度相似，HF 或 MEP 后应用 SBU 并不能提高 SBS。
