Vichi Alessandro, Fabian Fonzar Riccardo, Carrabba Michele, Louca Chris, Scotti Nicola, Mazzitelli Claudia, Breschi Lorenzo, Goracci Cecilia
Dental Academy, University of Portsmouth, Portsmouth PO1 2QG, UK.
Private Practice, Studio Fonzar, 33030 Campoformido, Italy.
Materials (Basel). 2021 Nov 10;14(22):6776. doi: 10.3390/ma14226776.
This study aimed at evaluating the effects of different surface conditionings on the microshear bond strength (µSBS) of a self-adhesive resin cement to VITA Suprinity (ZLS) and IPS e.max CAD (LD). Three surface conditioning protocols were performed on ZLS and LD before luting with a self-adhesive resin cement (RelyX Unicem 2, RXU): hydrofluoric acid (HF), HF + silane (HF + S), or Monobond Etch & Prime (EP). In each group, 15 cylindrical buildups of RXU were prepared on five milled bars and submitted to a µSBS test. Data were statistically analyzed with two-way ANOVA and Tukey's post hoc test ( < 0.05). Failure modes were recorded and classified as adhesive, mixed, cohesive in resin, or ceramic, and statistically analyzed with Fisher's exact test ( = 0.05). One additional bar per group was used for the morphological characterization of the conditioned surface by means of SEM. The material per se did not significantly influence adhesion ( = 0.744). Conditioning protocol was a significant factor: EP yielded significantly higher μSBS than HF ( = 0.005), while no significant differences emerged between EP and HF + S ( = 0.107), or HF + S and HF ( = 0.387). The material-conditioning protocol interaction was not statistically significant ( = 0.109). Significant intergroup differences were found in distribution of failure modes: mixed failures were predominant in the ZLS/EP group, while the other groups showed a prevalence of adhesive failures. The self-etching primer showed promising results in terms of immediate bond strength of a self-adhesive resin cement to lithium-silica-based glass ceramics, suggesting its alternative use to hydrofluoric acid and silane conditioning protocols.
本研究旨在评估不同表面处理对自粘性树脂水门汀与VITA Suprinity（ZLS）和IPS e.max CAD（LD）的微剪切粘结强度（µSBS）的影响。在用自粘性树脂水门汀（RelyX Unicem 2，RXU）粘结之前，对ZLS和LD进行了三种表面处理方案：氢氟酸（HF）、氢氟酸+硅烷（HF + S）或单键蚀刻与底涂剂（EP）。在每组中，在五根研磨棒上制备15个RXU圆柱形堆积体，并进行µSBS测试。数据采用双向方差分析和Tukey事后检验进行统计学分析（<0.05）。记录失效模式并分类为粘结性、混合性、树脂内聚性或陶瓷内聚性，并采用Fisher精确检验进行统计学分析（=0.05）。每组额外使用一根棒材，通过扫描电子显微镜对处理过的表面进行形态表征。材料本身对粘结没有显著影响（=0.744）。处理方案是一个显著因素：EP产生的µSBS显著高于HF（=0.005），而EP与HF + S之间（=0.107）或HF + S与HF之间（=0.387）没有显著差异。材料 - 处理方案的相互作用没有统计学意义（=0.109）。在失效模式分布中发现了显著的组间差异：混合失效在ZLS/EP组中占主导，而其他组则以粘结失效为主。自酸蚀底漆在自粘性树脂水门汀与锂硅基玻璃陶瓷的即时粘结强度方面显示出有前景的结果，表明其可替代氢氟酸和硅烷处理方案使用。
