底涂剂的化学处理对二氧化锆陶瓷树脂粘接效果的影响

目的 评估专用底涂剂的化学处理对二氧化锆陶瓷与自粘接型树脂水门汀间粘接效果的影响。方法 2.5 mm厚可切削二氧化锆陶瓷片（Vita InceramYZ）经烧结、研磨、清洗后，一半的陶瓷试件表面在0.3 MPa压力下接受50 μm Al2O3颗粒喷砂处理20 s。使用X射线荧光光谱仪对研磨和喷砂组的陶瓷表面成分进行定性定量分析。研磨和喷砂组的陶瓷片各分为2组：一组直接与自粘接型树脂水门汀（Biscem）进行粘接，另一组经底涂剂（Z Primer Plus）处理后与Biscem进行粘接。各实验组试件再分为两个亚组（n=10）经0、10000次冷热循环后接受剪切粘接 强度测量。使用多因素方差分析对数据进行统计。结果 喷砂后的陶瓷表面会有质量比为8.27%的Al2O3颗粒附着。 与喷砂处理相比，底涂剂处理对冷热循环前粘接强度的提高更加显著。冷热循环前后，未经过底涂剂处理的陶瓷与 树脂间粘接强度的差异无统计学意义（P>0.05），但经过底涂剂处理后陶瓷与树脂间粘接强度的差异有统计学意义（P<0.05）。结论 底涂剂的化学处理能够显著提高二氧化锆陶瓷与自粘接型树脂水门汀的初期粘接强度，但在耐 久实验条件下其粘接界面不稳定，会出现快速老化。

Effect of a chemical primer on the bond strength of a zirconia ceramic with self-adhesive resin cement

Objective To evaluate the bond strength and durability of a self-adhesive resin cement with a zirconia ceramic pretreated by a zirconia primer. Methods Zirconia ceramic (Vita Inceram YZ) plates with a thickness of 2.5 mm were fired, polished, and then cleaned. Half of the polished ceramic plates were sandblasted with 50 μm alumina particles at 0.3 MPa for 20 s. The surface compound weight ratios were measured via X-ray fluorescence microscopy. The polished and sandblasted ceramic plates were directly bonded with self-adhesive resin cement (Biscem) or were pretreated by a zirconia primer (Z Primer Plus) before bonding with Biscem. The specimens of each test group were divided into two subgroups (n=10) and subjected to the shear test after 0 and 10 000 thermal cycles. The data were analyzed via three-way ANOVA. Results After air abrasion, 8.27% weight ratio of alumina attached to the zirconia surface. Compared with air abrasion, primer treatment more significantly improved the primary resin bond strength of the zirconia ceramic. The primary resin bond strength of the zirconia ceramic with no primer treatment was not affected by thermocycling (P>0.05). However, the primary resin bond strength of the zirconia ceramic with primer treatment was significantly decreased by thermocycling (P<0.05). Conclusion Primer treatment can improve the primary resin bond strengths of zirconia ceramics. However, the bond interface of the primer is not stable and rapidly degraded during thermocycling.