Department of Biomaterials & Biomimetics, New York University College of Dentistry, NY, USA.
Director of Graduate Dental Research, 81st Dental Squadron, Keesler Air Force Base, MS, USA.
Eur J Prosthodont Restor Dent. 2024 Sep 1;32(3):270-276. doi: 10.1922/EJPRD_2455Bashary07.
In-office and lab milled prostheses are the staple for indirect restorations. It is therefore critical to determine their long-term bonding durability.
CAD/ CAM blocks of two classes of restorative materials: 1) a nano-ceramic reinforced polymer matrix (NCPM) and, 2) a polymer-infiltrated ceramic network (PICN) were bonded using four different universal adhesives (UA) and silane systems. A lithium disilicate glassceramic (LDS) was used as a reference. The blocks were bisected and bonded with different UA/resin-cement pairs. Bonded blocks were then cut into 1.0x1.0x12.0 mm bar specimens for microtensile bond testing. Half the bars were subjected to bond strength testing immediately and the other half after aging by 50,000 thermal cycles between 5°C and 55°C. ANOVA and post-hoc tests were used to compare mean bond strength among groups.
NCPM presented consistently high bond strength regardless of bonding techniques, while the bond strength of PICN and LDS were lower when bonded with UA relative to traditional silanes. The more hydrophilic UA produced higher bond strengths.
Glass-ceramics exhibited lower bond strength with UA than the conventional etch-rinse-silane techniques. However, UAs preserved bonding interface in the long-term.
NCPM displayed superior bond strength relative to PICN and LDS regardless of the type of adhesives and bonding techniques.
在诊室内和实验室加工的修复体是间接修复的主要方法。因此，确定其长期粘结耐久性至关重要。
使用四种不同的通用胶粘剂（UA）和硅烷系统将两类修复材料的 CAD/CAM 块粘结在一起：1）纳米陶瓷增强聚合物基质（NCPM）和 2）聚合物渗透陶瓷网络（PICN）。使用锂二硅玻璃陶瓷（LDS）作为参考。将块体等分并用不同的 UA/树脂粘结剂对进行粘结。然后将粘结的块体切割成 1.0x1.0x12.0mm 的棒状试件进行微拉伸粘结强度测试。一半的棒体立即进行粘结强度测试，另一半在 5°C 和 55°C 之间进行 50,000 次热循环老化后进行测试。使用方差分析和事后检验比较组间平均粘结强度。
NCPM 表现出一致的高粘结强度，无论粘结技术如何，而 PICN 和 LDS 的粘结强度在使用 UA 相对于传统硅烷时较低。亲水性更强的 UA 产生更高的粘结强度。
玻璃陶瓷与 UA 的粘结强度低于传统的蚀刻-冲洗-硅烷技术。然而，UA 在长期内保留了粘结界面。
NCPM 显示出优于 PICN 和 LDS 的粘结强度，无论使用的胶粘剂和粘结技术如何。
