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Chen, Mengxuan

University of British Columbia

Introduction: Silanization is a vital process to achieve interfacial adhesion between glass-matrix ceramics and resin cement. This study explored the kinetics of silanization and its effects on contact angle and bond strength. Methods: A 3% (v/v) 3-methacryloxypropyltrimethoxysilane (MPS) experimental silane solution was prepared and the activation process was monitored by Fourier-transform infrared spectroscopy (FTIR). The sample surfaces were separated into 2 independently treated classes: glass and ceramic. The glass class consisted of quartz and borosilicate glass, while the ceramic class consisted of lithium disilicate (LiSi) and leucite-reinforced feldspar (LRF). Each sample material was divided into a control group, a group etched with 9.5 % hydrofluoric acid (HF), and groups after HF etching then application of silane for selected time periods. The surface wettability following silanization was characterized by contact angle measurement. After bonding with adhesive and resin cement, shear bond strength (SBS) and type of fracture mode was tested after 1 day and 1 month in aqueous or dry storage conditions; to further validate mode analysis the ceramic samples were also assessed with SEM. Commercial silane (Porcelain Primer, Bisco, USA) was used for comparison with the experimental silane for ceramic samples. Data was analyzed by two-way analysis of variance (ANOVA) (α = 0.05) followed by a Tukey’s Honest Significant Difference (HSD) post-hoc test. Results: In the contact angle test, experiments performed on glass and ceramics revealed a decrease trend following surface etching compared to no treatment. The contact angle test on the glasses indicated a notable impact of silicon dioxide content on the substrate's surface properties (p < 0.001). In ceramics, contact angle substantially increased after 2 min silanization treatment compared to no treatment (p ≤ 0.001) and achieved the highest contact angle after 5 - 10 min of silanization (p < 0.001). Both experimental and commercial silane coupling agents were effective in modifying the surface characteristics and enhancing the SBS (p < 0.05). Cohesive failure predominantly occurred within the glasses or ceramics. Conclusion: The kinetics of silanization have a significant effect on the contact angle and bond strength of glass and glass-matrix ceramics.

Text; Still Image

2024-09-30

Attribution-NonCommercial-NoDerivatives 4.0 International

http://hdl.handle.net/2429/85759

Craniofacial Science

University of British Columbia

UBCV

http://creativecommons.org/licenses/by-nc-nd/4.0/