Department of Conservative Dentistry and Fixed Prosthodontics, Faculty of Dentistry, Mansoura University, Mansoura, Egypt.
Dent Mater. 2011 Mar;27(3):207-13. doi: 10.1016/j.dental.2010.10.004. Epub 2010 Nov 10.
The purpose of this laboratory study was to evaluate the influence of different surface conditioning, new ceramic primers and cleaning methods on the bond strength of luting resin to zirconia ceramic (e.max ZirCAD).
A total of 96 zirconia ceramic discs were divided into six groups (n=16) according to surface conditioning, cleaning methods and ceramic primers. Zirconia ceramic discs were either air-abraded with 110 μm alumina particles or tribochemically silica-coated (Rocatec). Visible dust resulting from air-borne particle abrasion or silica coating was removed either by oil-free air stream or by ultrasonic cleaning in alcohol. Then either a conventional silane (Espe Sil) or a universal primer containing a silane and a phosphate monomer (Monobond Plus) were applied to the conditioned surface. Transparent plastic tubes filled with composite resin were bonded to the zirconia ceramic discs using a luting resin (MultiLink Automix). The bonded specimens were stored in water at 37°C for 3 days and for 30 days with 7500 thermal cycles between 5°C and 55°C prior to tensile test. Statistical analyses were conducted with three-, two- and one-way ANOVAs followed by comparison of means with Tukey's HSD test.
Tensile bond strength ranged from 31.5 to 45.2 MPa after 3 days and from 10.6 to 38.8 MPa after 30 days storage in water with thermal cycling. After artificial aging the decrease in bond strength was significant when the conventional silane was applied after silica coating or when the universal primer was used after air-borne particle abrasion without ultrasonic cleaning (P<.05). However after artificial aging, the decrease in bond strength was not significant (P>.05) when the universal primer was used after air-borne particle abrasion with ultrasonic cleaning or after silica coating.
A new universal primer improved bonding to zirconia ceramic while the cleaning method had little or no effect.
本实验室研究的目的是评估不同表面处理、新型陶瓷底涂剂和清洁方法对黏结树脂与氧化锆陶瓷（e.max ZirCAD）黏结强度的影响。
共 96 个氧化锆陶瓷圆盘根据表面处理、清洁方法和陶瓷底涂剂分为 6 组（n=16）。氧化锆陶瓷圆盘采用 110μm 氧化铝颗粒进行空气喷砂或进行硅烷化的二氧化硅涂层（Rocatec）处理。空气喷丸或硅烷化产生的可见粉尘分别采用无油气流或酒精中的超声清洗去除。然后，对处理后的表面应用传统硅烷（Espe Sil）或含有硅烷和磷酸单体的通用底涂剂（Monobond Plus）。用黏结树脂（MultiLink Automix）将充满复合树脂的透明塑料管黏接到氧化锆陶瓷圆盘上。黏结后的标本在 37°C 的水中储存 3 天，在 5°C 和 55°C 之间进行 7500 次热循环 30 天后，进行拉伸试验。采用三维、二维和一维方差分析进行统计分析，然后采用 Tukey's HSD 检验进行均值比较。
在 3 天和 30 天的水中储存并进行热循环后，拉伸黏结强度范围分别为 31.5-45.2MPa 和 10.6-38.8MPa。经过人工老化后，当在二氧化硅涂层后应用传统硅烷或在空气喷丸后应用通用底涂剂而不进行超声清洗时，黏结强度的下降具有显著意义（P<.05）。然而，在人工老化后，当在空气喷丸后应用通用底涂剂并进行超声清洗或在二氧化硅涂层后，黏结强度的下降不具有显著意义（P>.05）。
新型通用底涂剂改善了氧化锆陶瓷的黏结性能，而清洁方法的影响较小或没有影响。
