J Adhes Dent. 2018;20(6):549-558. doi: 10.3290/j.jad.a41634.
This study compared bond strength, durability, and mechanical properties of luting cements for bonding zirconia: a resin-modified glass ionomer cement (RMGIC), a conventional composite cement, and two self-adhesive composite cements.
The air-abraded zirconia specimens were assigned to 12 groups (n = 30) to prepare bonded specimens. Classification was based on the pre-conditioning selection: none; primers containing 10-methacryloyloxydecyl dihydrogen phosphate (MDP); universal adhesives containing MDP. Further classification was done according to the type of luting cement: RMGIC; conventional composite cement; MDP-free self-adhesive composite cement; MDP-containing self-adhesive composite cement. The shear bond strength (SBS) was measured after 24 h of water storage or aging with 20,000 thermocycles plus an additional 60 days of water storage at 37°C. The elastic modulus and three-point bending strength were determined, and a related Weibull analysis of the four luting cements was performed.
The choice of luting cement and aging significantly affected the SBS. Aging decreased the SBS in most groups, except for those that used MDP-containing primers plus conventional composite cements. RMGIC had SBS (before and after aging) that were similar to the MDP-free self-adhesive composite cement. Use of MDP-containing products prior to conventional composite cements provided the highest initial SBS. However, pre-conditioning with MDP-containing products failed to increase the SBS of RMGIC. RMGIC showed lower elastic modulus and three-point bending strength than did the three composite cements.
RMGIC is an alternative to composite cements for luting zirconia restorations. Conditioning with a primer containing MDP combined with conventional composite cement is more reliable.
本研究比较了用于粘结氧化锆的粘固剂的粘结强度、耐久性和机械性能：树脂改良型玻璃离子水门汀（RMGIC）、传统复合水泥以及两种自粘接复合水泥。
对喷砂氧化锆试件进行分组（n = 30），制备粘结试件。分类基于预处理选择：无预处理；含 10-甲基丙烯酰氧癸基二氢磷酸酯（MDP）的底漆；含 MDP 的通用粘结剂。根据粘固剂的类型进一步分类：RMGIC；传统复合水泥；不含 MDP 的自粘接复合水泥；含 MDP 的自粘接复合水泥。在水储存 24 小时或经过 20,000 次热循环加 37°C 水储存 60 天后测量剪切粘结强度（SBS）。测定弹性模量和三点弯曲强度，并对四种粘固剂进行相关威布尔分析。
粘固剂的选择和老化显著影响 SBS。除使用含 MDP 底漆加传统复合水泥的组外，大多数组的老化都会降低 SBS。RMGIC 的 SBS（老化前后）与不含 MDP 的自粘接复合水泥相似。在使用传统复合水泥之前使用含 MDP 的产品可提供初始 SBS。然而，含 MDP 产品预处理未能提高 RMGIC 的 SBS。RMGIC 的弹性模量和三点弯曲强度均低于三种复合水泥。
RMGIC 是粘结氧化锆修复体的复合水泥替代品。使用含 MDP 的底漆预处理结合传统复合水泥更可靠。
