Piracicaba Dental School, State University of Campinas, SP, Brazil.
PhD Program in Dental Materials, Piracicaba Dental School, State University of Campinas, SP, Brazil.
Braz Dent J. 2024 Mar 22;35:e245641. doi: 10.1590/0103-6440202405641. eCollection 2024.
This study verified the effect of the combination of preheated hydrofluoric acid/silane/electric current in the adhesion of the resin cement to ceramic. IPS E.max Press ceramic discs embedded in PVC rigid tubes were divided into four groups associating preheated hydrofluoric acid and silane applied with electrical current (n=10): Ha+S (Heated acid + silane); Ha+S+Ec (Heated acid + silane + electrical current); A+S (Acid + silane) and A+S+Ec (Acid + silano + electrical current). Resin cement/ceramic samples were stored in water at 37°C for 24h. After storage, they were submitted to the microshear test, fracture analysis, and contact angle at 24h or after thermocycling (10,000 cycles/5-55ºC). Bond strength data were evaluated by two-way ANOVA. For comparison between evaluation times (24h or thermocycling) was applied unpaired t-test. A significance post-hoc test of p=0.05 was assumed for analyses and graphs (GraphPad Prism 9.0 software). At 24h, the microshear strength showed similar values between Ha+S, Ha+S+Ec, and A+S+Ec groups, while A+S showed the lowest value with a statistical difference. After thermocycling, Ha+S and Ha+S+Ec were similar, as well as A+S and A+S+Ec. There was a significant difference in all groups comparing 24h (highest value) with after thermocycling (lowest value). Adhesive fracture was predominant in all groups and evaluation times. Ha+S and A+S groups showed higher contact angle values compared to the Ha+S+Ec and A+S+Ec with lower values. In conclusion, the association of preheated hydrofluoric acid/silane applied or not with electric current promoted different microshear strength values, fracture types, and contact angles in the resin cement/ceramic bond.
本研究验证了预加热氢氟酸/硅烷/电流联合对树脂水门汀与陶瓷粘结效果的影响。将 IPS E.max Press 陶瓷圆盘嵌入 PVC 刚性管中，分为四组，分别联合应用预加热氢氟酸和硅烷并施加电流（n=10）：Ha+S（加热酸+硅烷）；Ha+S+Ec（加热酸+硅烷+电流）；A+S（酸+硅烷）和 A+S+Ec（酸+硅烷+电流）。树脂水门汀/陶瓷样本在 37°C 的水中储存 24h。储存后，将其进行微剪切试验、断裂分析和接触角试验，分别在 24h 或热循环（10,000 次/5-55°C）后进行。采用双因素方差分析评估粘结强度数据。采用配对 t 检验比较评估时间（24h 或热循环）。分析和图表（GraphPad Prism 9.0 软件）采用假设 p=0.05 的事后检验。在 24h 时，Ha+S、Ha+S+Ec 和 A+S+Ec 组的微剪切强度值相似，而 A+S 组的强度值最低，差异具有统计学意义。热循环后，Ha+S 和 Ha+S+Ec 组相似，A+S 和 A+S+Ec 组也相似。与热循环后（最低值）相比，所有组在 24h（最高值）时均有显著差异。所有组均以粘结性断裂为主，且在所有评估时间内均如此。与 Ha+S+Ec 和 A+S+Ec 相比，Ha+S 和 A+S 组的接触角值较高，而 Ha+S+Ec 和 A+S+Ec 组的接触角值较低。综上所述，预加热氢氟酸/硅烷联合应用或不联合应用电流对树脂水门汀/陶瓷粘结的微剪切强度值、断裂类型和接触角有不同的影响。
