Abo-Hamar Sahar E, Federlin Marianne, Hiller Karl-Anton, Friedl Karl-Heinz, Schmalz Gottfried
Department of Operative Dentistry and Periodontology, Dental School, University of Regensburg, Franz Josef Strauss Allee 11, 93042 Regensburg, Germany.
Dent Mater. 2005 Sep;21(9):794-803. doi: 10.1016/j.dental.2005.01.015.
The purpose of this study was to evaluate the effect of either eugenol-containing or eugenol-free temporary cement removal by excavator or sandblasting on the shear bond strength of ceramic luted to dentin.
A self-etching primer system, Panavia F 2.0, Kuraray Medical (PF2), and a total-etch bonding system, Excite/Variolink II, Vivadent (EXV), were used. One hundred and forty human molars, ground to expose dentin surfaces, were divided into 14 groups (seven groups for each adhesive system). For each adhesive system, either a eugenol-containing (Temp bond) or a eugenol-free (Temp bond NE) temporary cement was applied to the dentin surface for 7 days, then removed by an excavator or sandblasting (four groups). Three control groups were studied where fresh dentin was either scratched by excavator or sandblasted, or underwent no surface treatment. After application of the adhesives, ceramic cones (Cerafil inserts) were adhesively luted to standardized dentin areas. After 24 h storage in distilled water, the shear bond strengths were determined at a cross-head speed of 0.75 mm/min.
For each adhesive system, neither the method of temporary cement removal nor the type of temporary cement affected the bond strength significantly (P<or=0.05). EXV showed statistically higher bond strengths (26.6-31.6 MPa) than PF2 (8.6-12.9 MPa) within all groups.
The use of temporary cements, either containing eugenol or not, does not alter the retentive strength of ceramic restorations luted to dentin using the tested adhesive systems, whether the temporary cements are removed by excavator or sandblasting.
本研究旨在评估用挖匙或喷砂去除含丁香酚或不含丁香酚的临时水门汀对陶瓷与牙本质粘结的剪切粘结强度的影响。
使用一种自酸蚀底漆系统——可乐丽医疗株式会社的Panavia F 2.0（PF2），以及一种全酸蚀粘结系统——义获嘉伟瓦登特公司的Excite/Variolink II（EXV）。140颗磨除后暴露牙本质表面的人磨牙被分为14组（每种粘结系统7组）。对于每种粘结系统，将含丁香酚的（临时粘结剂）或不含丁香酚的（无丁香酚临时粘结剂）临时水门汀涂覆于牙本质表面7天，然后用挖匙或喷砂去除（4组）。研究了3个对照组，分别为新鲜牙本质用挖匙刮擦、喷砂或未进行表面处理。粘结剂应用后，将陶瓷圆锥体（Cerafil嵌体）粘结到标准化牙本质区域。在蒸馏水中储存24小时后，以0.75mm/min的十字头速度测定剪切粘结强度。
对于每种粘结系统，临时水门汀的去除方法和临时水门汀的类型均未显著影响粘结强度（P≤0.05）。在所有组中，EXV的粘结强度（26.6 - 31.6MPa）在统计学上均高于PF2（8.6 - 12.9MPa）。
无论临时水门汀是含丁香酚还是不含丁香酚，使用测试的粘结系统时，无论临时水门汀是用挖匙还是喷砂去除，均不会改变陶瓷修复体与牙本质粘结的固位强度。
