University Clinic of Dentistry, Medical University of Vienna, Austria.
School of Medical Sciences and Photon Science Institute, University of Manchester, Manchester, UK.
Dent Mater. 2021 Mar;37(3):464-476. doi: 10.1016/j.dental.2020.12.001. Epub 2021 Jan 13.
The aim of this study was to identify the relative strengths and weaknesses of different interfaces within the multilayer structure of a zirconia crown restoration when applying different surface pretreatments. These include the influence on shear strengths of different air abrasion protocols, glaze-on techniques, zirconia primers and self-adhesive cements for either the complex structure: zirconia / self adhesive resin composite cement (RCC) / bovine dentin substrate (part 1) or the RCC / zirconia substrate (part 2).
In Part 1, zirconia discs, pretreated by either glaze-on techniques or air abrasion using Rocatec™ Soft, were bonded to bovine dentin substrates with different self-adhesive RCCs. In Part 2, steel-cylinders were bonded to zirconia cuboid substrates, pretreated by either different protocols for air-abrasion or a glaze-on-technique, with different self-adhesive RCCs. Shear bond strengths (SBS) were measured for all interfacial combinations.
In part 1, application of air abrasion using Rocatec™ Soft significantly increased the SBS of zirconia to dentin compared to control specimens without pretreatment, while glaze-on techniques did not increase the SBS. Pretreatment of zirconia surfaces with two primers (either Clearfil Ceramic Primer, or Monobond S) showed significantly higher SBS than the controls. Cementations with RelyX Unicem 2 Automix showed significantly higher SBS than with MaxCem Elite. In Part 2, all air abrasion protocols increased the SBS, but there was no significant difference between these protocols. Again the glaze-on technique did not increase SBS. A significant difference between the two RCCs was again observed. When zirconia substrates were air abraded, regardless of which protocol was applied, the highest SBS were obtained by Calibra with P&B active followed by Panavia with or without Clearfil Ceramic Primer Plus. Calibra applied without P&B active exhibited the lowest SBS.
Pretreatment of zirconia substrates using air abrasion and/or ceramic primers increased the SBS of the zirconia cement interface. For all tested glaze-on treatments, in our experimental setting no effect was observed.
本研究旨在确定氧化锆冠修复体多层结构内不同界面的相对优势和劣势，应用不同的表面预处理方法。这些包括不同的空气喷砂协议、上釉技术、氧化锆底漆和自粘水泥对剪切强度的影响，这些协议用于复杂结构：氧化锆/自粘树脂复合水泥（RCC）/牛牙本质基底（第 1 部分）或 RCC/氧化锆基底（第 2 部分）。
在第 1 部分中，通过上釉技术或使用 Rocatec™ Soft 进行空气喷砂预处理的氧化锆圆盘与不同的自粘 RCC 粘结到牛牙本质基底上。在第 2 部分中，钢圆柱体与氧化锆长方体基底粘结，基底经不同的空气喷砂预处理协议或上釉技术预处理，用不同的自粘 RCC 粘结。测量所有界面组合的剪切结合强度（SBS）。
在第 1 部分中，与未经预处理的对照标本相比，使用 Rocatec™ Soft 进行空气喷砂处理显著提高了氧化锆与牙本质的 SBS，而上釉技术并未提高 SBS。两种底漆（Clearfil Ceramic Primer 或 Monobond S）预处理氧化锆表面显示出比对照更高的 SBS。使用 RelyX Unicem 2 Automix 粘结显示出比 MaxCem Elite 更高的 SBS。在第 2 部分中，所有空气喷砂协议都提高了 SBS，但这些协议之间没有显著差异。上釉技术再次未提高 SBS。两种 RCC 之间再次观察到显著差异。当氧化锆基底进行空气喷砂处理时，无论应用哪种协议，Calibra 与 P&B active 一起使用后再涂 Panavia 获得的 SBS 最高，其次是不使用 Clearfil Ceramic Primer Plus 的 Panavia。不使用 P&B active 涂 Calibra 时，SBS 最低。
使用空气喷砂和/或陶瓷底漆预处理氧化锆基底可提高氧化锆粘结界面的 SBS。对于所有测试的上釉处理，在我们的实验设置中没有观察到效果。
