ABSTRACT

Sol–gel coating technology was applied to modify the bonding surface of self-glazed zirconia (SZ). Its effect on the bond strength of SZ to enamel was evaluated in vitro in comparison with the conventional milled zirconia treated by airborne-particle abrasion (CZa) and the heat-pressed lithium disilicate glass-ceramics treated by etching and silanization (LDe). All ceramic specimens were bonded to the etched bovine enamel with adhesive resin cement. Shear bond strength of both sol–gel coated SZ groups with different strategies (SZc1 and SZc2) was 20.00 ± 7.07 MPa and 18.32 ± 3.63 MPa, respectively, which was comparable to that of LDe, 18.44 ± 2.27 MPa (p > 0.05) and significantly higher than that of CZa, 11.72 ± 1.48 MPa, and SZ, 3.06 ± 1.66 MPa (p < 0.05). Lots of voids between zirconia clusters were observed on the bonding surface of SZc1, yet that of SZc2 showed homogeneous honeycomb nanoporous structure. All groups exhibited mixed failure except SZ, and the fracture surfaces of SZc1, SZc2, and LDe showed better wettability than CZa. Sol–gel coating could improve the bond strength of SZ to enamel, and the sol–gel coated SZ might have the potential to make minimally invasive restorations.

摘要

应用溶胶-凝胶涂层技术对自釉氧化锆 (SZ) 的结合表面进行改性。通过与通过空气颗粒磨损 (CZa) 处理的常规研磨氧化锆和通过蚀刻和硅烷化处理 (LDe) 处理的热压二硅酸锂微晶玻璃进行比较，在体外评估了其对 SZ 与牙釉质结合强度的影响。所有陶瓷标本都用粘合树脂粘固剂粘合到蚀刻的牛牙釉质上。采用不同策略（SZc1 和 SZc2）的两个溶胶-凝胶涂层 SZ 组的剪切粘合强度分别为 20.00 ± 7.07 MPa 和 18.32 ± 3.63 MPa，与 LDe 的 18.44 ± 2.27 MPa（p  > 0.05）和显着高于 CZa 的 11.72 ± 1.48 MPa 和 SZ 的 3.06 ± 1.66 MPa ( p < 0.05)。SZc1 的结合表面观察到氧化锆团簇之间存在大量空隙，而 SZc2 的结合表面显示出均匀的蜂窝状纳米多孔结构。除 SZ 外，所有组均表现出混合破坏，SZc1、SZc2 和 LDe 的断口表现出比 CZa 更好的润湿性。溶胶-凝胶涂层可以提高 SZ 与牙釉质的结合强度，溶胶-凝胶涂层 SZ 可能具有进行微创修复的潜力。