Abstract

This study evaluated if using an MDP-containing ceramic primer combined with acid etching or without improves the microshear bond strength of resin cement to a zirconia-reinforced lithium silicate ceramic (ZLS). A total of 32 ZLS ceramic plates (Vita Suprinity) were prepared and divided according to the following adhesive procedures: primer (P), silane (S), hydrofluoric acid etching + primer (HFP), or hydrofluoric acid etching + silane (HFS). Resin cement was inserted and photo-cured into starch tubes (0.96 mm × 1 mm) over the treated ceramic surfaces. Half of the specimens were tested (microshear bond strength – µSBS) after 24 h and the other half after aging (90 days in distilled water and 10,000 thermocycles) (10 tubes/slice, n = 40). Pre-test failures were recorded and failure mode images were performed in a scanning electron microscope (SEM). Ceramic surfaces underwent as-sintered, HF etching, ceramic primer, or silane applications and were observed in SEM and had the contact angles analyzed. The data for bond strength, failure mode and number of pre-test failures were analyzed by ANOVA, t-tests, and Chi-square tests. HFS and HFP treatments showed similar and highest µSBS means in both baseline and aged conditions, and its bond strength was maintained after aging. The failure mode and number of pre-test failures were proven treatment-dependent. HF modified the ceramic surface and led to the lowest contact angle. MDP-containing ceramic primer without previous HF etching did not produce long-term bonding between ZLS and resin cement and did not improve the bond strength when HF etching was used.

摘要

这项研究评估了是否将含MDP的陶瓷底漆与酸蚀刻结合使用，还是不提高树脂水泥与氧化锆增强的硅酸锂陶瓷（ZLS）的微剪切粘结强度。总共准备了32块ZLS陶瓷板（Vita Suprinity），并根据以下粘合程序进行划分：底漆（P），硅烷（S），氢氟酸蚀刻+底漆（HFP）或氢氟酸蚀刻+硅烷（HFS） 。将树脂水泥插入并在经过处理的陶瓷表面上光固化到淀粉管（0.96 mm×1 mm）中。24小时后测试一半试样（微剪切粘结强度– µSBS），老化后另一半测试（在蒸馏水中90天和10,000个热循环）（10管/切片，n = 40）。记录测试前的故障，并在扫描电子显微镜（SEM）中执行故障模式图像。陶瓷表面经过烧结，HF蚀刻，陶瓷底漆或硅烷应用，并在SEM中进​​行了观察并分析了接触角。结合强度，失效模式和预测试失效次数的数据通过ANOVA分析，t-tests和卡方检验。HFS和HFP处理在基线和老化条件下均显示出相似且最高的µSBS平均值，并且其结合强度在老化后得以保持。失败模式和测试前失败的数量被证明与治疗有关。HF修饰了陶瓷表面并导致最小的接触角。如果不使用先前的HF蚀刻，则包含MDP的陶瓷底漆不会在ZLS和树脂胶泥之间产生长期粘结，并且在使用HF蚀刻时不会提高粘结强度。