Gen Dent. 2024 Nov-Dec;72(6):20-24.
The purpose of this study was to evaluate the influence of simplified ceramic surface treatments on the microshear bond strength (μSBS) of 2 resin cements to a zirconia-reinforced lithium silicate (ZLS) material. Blocks of ZLS were sectioned to obtain a total of 90 specimens (1.5 mm thick), which were assigned to 9 different surface treatment protocols (n = 10). Either hydrofluoric acid (HF) surface conditioner or ammonium polyfluoride self-etching ceramic primer (Monobond Etch & Prime [MEP]) was used for surface treatment and then combined with different bonding strategies (Monobond N silane-based universal primer, Prosil silane coupling agent, Ambar Universal APS self-etching adhesive, and/or Signum Zirconia Bond methyl methacrylate-based bonding system [SZB]) and luting agents (Allcem or Multilink Automix dual-curing resin cement). Composite resin cylinders were bonded to ZLS with each of the cementation protocols, and the specimens were subjected to 6000 thermal cycles from 5°C to 55°C prior to the μSBS evaluation. The failure mode was analyzed with the aid of a stereoscopic loupe. Statistical analyses were performed with 1-way analysis of variance and Tukey HSD test (α = 0.05). The HF and MEP protocols resulted in significantly higher μSBS values (P < 0.001), while conditioning with SZB resulted in the lowest μSBS. Multilink Automix groups presented higher μSBS values than Allcem groups (P < 0.01). There was no statistically significant difference in the μSBS values of the MEP + Allcem groups based on whether or not an adhesive layer was applied. The failure mode was predominantly adhesive for all specimens. The results indicate that the ammonium polyfluoride-based material MEP may be used as a substitute for surface treatment with HF and silane, but the use of a zirconia primer alone is not advised for bonding to a ZLS ceramic material.
本研究旨在评估简化的陶瓷表面处理对 2 种树脂水门汀与氧化锆增强锂硅玻璃陶瓷（ZLS）材料间微剪切粘结强度（μSBS）的影响。将 ZLS 块体切割成总共 90 个试件（厚 1.5mm），并按 9 种不同的表面处理方案分组（n = 10）。试件分别用氢氟酸（HF）表面处理剂或聚氟化物自酸蚀陶瓷处理剂（Monobond Etch & Prime [MEP]）进行表面处理，然后分别与不同的粘结策略（Monobond N 硅烷通用底涂剂、Prosil 硅烷偶联剂、Ambar Universal APS 自酸蚀粘结剂和/或 Signum Zirconia Bond 甲基丙烯酸甲酯基粘结系统 [SZB]）和水门汀（Allcem 或 Multilink Automix 双重固化树脂水门汀）联合使用。用每种粘结方案将复合树脂圆柱体粘结到 ZLS 试件上，在 μSBS 评价前将试件在 5°C 至 55°C 间进行 6000 次热循环。采用立体显微镜分析失效模式。采用单因素方差分析和 Tukey HSD 检验（α = 0.05）进行统计学分析。HF 和 MEP 方案导致 μSBS 值显著增加（P < 0.001），而 SZB 预处理导致 μSBS 值最低。Multilink Automix 组的 μSBS 值高于 Allcem 组（P < 0.01）。对于是否应用粘结层，MEP + Allcem 组的 μSBS 值之间没有统计学差异。所有试件的失效模式均主要为粘结性失效。结果表明，基于聚氟化物的 MEP 材料可替代 HF 和硅烷进行表面处理，但不建议单独使用氧化锆处理剂来粘结 ZLS 陶瓷材料。
