修复性和粘结性固化方法对牙本质粘结强度的影响。

Swift E J, Perdigão J, Combe E C, Simpson C H, Nunes M F

Department of Operative Dentistry, University of North Carolina School of Dentistry, Chapel Hill 27599-7450, USA.

Am J Dent. 2001 Jun;14(3):137-40.

PURPOSE

To evaluate the shear bond strengths of "one-bottle" adhesives to dentin when used with self-cured composite.

MATERIALS AND METHODS

100 bovine teeth were ground to expose superficial dentin, which was polished to 600-grit. The dentin was etched for 15 s with 35% phosphoric acid, rinsed, and blotted with tissue paper. The surface remained visibly moist for all specimens. The following adhesives were applied to the etched dentin according to manufacturers' directions: Scotchbond Multi-Purpose (in its visible light-cured [VLC] and self-cure modes) as a control, One-Step (VLC only), OptiBond Solo Plus (VLC only), Prime & Bond NT (VLC) and Prime & Bond NT Dual-Cure. For each adhesive, specimens were bonded with a self-cure composite, while 10 were bonded with a VLC composite as a control. After 24 hrs water storage, shear bond strengths were determined using an Instron universal testing machine. Data were analyzed using two-way ANOVA, Tukey's test, and Student's t-tests.

RESULTS

Using the light-cured composite, mean bond strengths ranged from 11.0 MPa for light-cured Prime & Bond NT to 26.3 MPa for OptiBond Solo Plus. Using the self-cure composite, mean bond strengths ranged from 0.0 for light-cured Prime & Bond NT to 21.4 MPa for One-Step. Two adhesives, light-cured Prime & Bond NT and OptiBond Solo Plus, had significantly lower bond strengths when used with the self-cure composite.

CLINICAL SIGNIFICANCE

Some "one-bottle" dentin adhesives may not provide acceptable bonding to tooth structure when they are used with self-cure composites.

目的

评估“单瓶”粘合剂与自固化复合材料一起使用时对牙本质的剪切粘结强度。

材料与方法

将100颗牛牙磨开以暴露表层牙本质，打磨至600目。用35%磷酸对牙本质蚀刻15秒，冲洗后用纸巾吸干。所有标本的表面均保持明显湿润。按照制造商说明将以下粘合剂应用于蚀刻后的牙本质：Scotchbond多功能粘合剂（可见光固化[VLC]和自固化模式）作为对照，一步粘合剂（仅VLC模式），OptiBond Solo Plus粘合剂（仅VLC模式），Prime & Bond NT粘合剂（VLC模式）和Prime & Bond NT双固化粘合剂。对于每种粘合剂，用自固化复合材料粘结标本，同时用VLC复合材料粘结10个标本作为对照。在储存24小时后，使用Instron万能试验机测定剪切粘结强度。使用双向方差分析、Tukey检验和学生t检验分析数据。

结果

使用光固化复合材料时，平均粘结强度范围从光固化Prime & Bond NT的11.0MPa到OptiBond Solo Plus的26.3MPa。使用自固化复合材料时，平均粘结强度范围从光固化Prime & Bond NT的0.0MPa到一步粘合剂的21.4MPa。两种粘合剂，光固化Prime & Bond NT和OptiBond Solo Plus，与自固化复合材料一起使用时粘结强度显著较低。