Adhesive Cementation of CAD/CAM Silica-based Ceramics: Effect of Adhesive Type and Long-term Aging on the Bond Strength to Composite Cement.

Nathalia Ramos da Silva, Evelynn Crhistyann Medeiros Duarte, Dayanne Monielle Duarte Moura, Nathália de Carvalho Ramos, Karina Barbosa Souza, Fábio Roberto Dametto, Mutlu Özcan, Marco Antonio Bottino, Rodrigo Othávio de Assunção E Souza
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Abstract

Purpose: To investigate the effect of adhesive type and long-term aging on the shear bond strength (SBS) between silica-based ceramics and composite cement (CC).

Materials and methods: Lithium-silicate (LS), feldspathic (FD) and polymer-infiltrated ceramic (PIC) blocks were sectioned (10 x 12 x 2 mm) and divided into 24 groups considering the factors: "ceramics" (LS, FD, and PIC), "adhesive" (Ctrl: without adhesive; 2SC: 2-step conventional; 3SC: 3-step conventional; 1SU: 1-step universal), and "aging" (non-aged or aged [A]). After the surface treatments, CC cylinders (n = 15, Ø = 2 mm; height = 2 mm) were made and half of the samples were subjected to thermocycling (10,000) and stored in water at 37°C for 18 months. The samples were submitted to SBS testing (100 kgf, 1 mm/min) and failure analysis. Extra samples were prepared for microscopic analysis of the adhesive interface. SBS (MPa) data was analyzed by 3-way ANOVA and Tukey's test (5%). Weibull analysis was performed on the SBS data.

Results: All factors and interactions were significant for SBS (p<0.05). Before aging, there was no significant difference between the tested groups and the respective control groups. After aging, the LS_1SU (22.18 ± 7.74) and LS_2SC (17.32 ± 5.86) groups exhibited significantly lower SBS than did the LS_Ctrl (30.30 ± 6.11). Only the LS_1SU group showed a significant decrease in SBS after aging vs without aging. The LS_1SU (12.20) group showed the highest Weibull modulus, which was significantly higher than LS_2SC_A (2.82) and LS_1SU_A (3.15) groups.

Conclusion: No type of adhesive applied after silane benefitted the long-term adhesion of silica-based ceramics to CC in comparison to the groups without adhesive.

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CAD/CAM 硅基陶瓷的粘接固化:粘合剂类型和长期老化对复合水泥粘接强度的影响。
目的:研究粘合剂类型和长期老化对硅基陶瓷与复合水泥(CC)之间剪切粘结强度(SBS)的影响:将硅酸锂(LS)、长石(FD)和聚合物渗透陶瓷(PIC)砌块切片(10 x 12 x 2 毫米),并根据因素分为 24 组:"陶瓷"(LS、FD 和 PIC)、"粘合剂"(Ctrl:无粘合剂;2SC:2 步常规;3SC:3 步常规;1SU:1 步通用)和 "老化"(未老化或老化 [A])。表面处理后,制作 CC 圆柱体(n = 15,直径 = 2 毫米;高 = 2 毫米),其中一半样品经过热循环(10,000 次),并在 37°C 的水中保存 18 个月。对样品进行 SBS 测试(100 kgf,1 mm/min)和失效分析。还准备了额外的样品用于粘合界面的显微分析。SBS (MPa) 数据通过 3 方方差分析和 Tukey's 检验(5%)进行分析。对 SBS 数据进行了 Weibull 分析:结果:所有因素和交互作用对 SBS 都有显著影响(pConclusion):与不使用粘合剂的组别相比,硅烷之后使用的粘合剂类型都不利于硅基陶瓷与 CC 的长期粘合。
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