Effect of operator variability on dentin bond strength of two-step bonding systems.
Effect of operator variability on dentin bond strength of two-step bonding systems.
复制标题
操作员变异性对两步粘合系统牙本质粘合强度的影响。
DOI：
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复制
发表时间：
2000
影响因子：
1.4
通讯作者：
B. Moore
中科院分区：
文献类型：
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作者：
M. Miyazaki;H. Onose;B. Moore
目的
研究操作者可变性对最近开发的两步粘接系统与牙本质的粘附的影响。
材料和方法
采用自蚀刻底漆系统Fluoro Bond/Lite-Fil II A（FB）和单瓶粘合剂系统Single Bond/Z100（SB）。从大学牙医（第1组）、本科生（第2组）和全科医生（第3组）中选择了三组，每组由15名操作员组成。将提取的牛牙齿的唇表面在湿的600粒度SiC纸上研磨，然后用无油压缩空气洗涤和干燥。根据每个粘合剂系统的说明书处理这些表面，并将修复树脂冷凝到Teflon模具（2 mm高，4 mm内径）中，然后光固化。将成品试样在37 ℃蒸馏水中保存1 h，以1.0 mm/min的十字头速度进行剪切试验，对平均值和标准差进行双因素方差分析（P < 0.05）。
结果
两种粘合剂的粘合强度在每个操作员组中存在显著差异。对于三个不同组，SB的粘合强度变化范围大于FB。教师组的平均粘结强度在统计学上大于其他两组，没有显着差异。尽管样本制备是在体外条件下进行的，但较大的变异系数表明，可能难以为最佳粘合创造合适的表面条件。
PURPOSE
To examine the influence of operator variability on adhesion to dentin of recently developed two-step bonding systems.
MATERIALS AND METHODS
A self-etching primer system, Fluoro Bond/Lite-Fil II A (FB) and a one-bottle adhesive system, Single Bond/Z100 (SB) were employed. Three groups, each consisting of 15 operators, were selected from the dentists at the university (Group 1), undergraduate students (Group 2), and general practitioners (Group 3). Labial surfaces of extracted bovine teeth were ground on wet 600-grit SiC paper and then washed and dried with oil-free compressed air. These surfaces were treated according to each adhesive system's instructions and the restorative resins were condensed into a Teflon mold (2 mm height, 4 mm internal diameter) and then light-cured. The finished specimens were stored in 37 degrees C distilled water for 1 hr. These specimens were tested in a shear mode at a cross-head speed of 1.0 mm/min. The mean and standard deviation were subjected to two-way ANOVA (P < 0.05).
RESULTS
Significant differences in bond strength of the two adhesives were found within each operator group. A wider variation in bond strength was seen for SB compared to FB for the three different groups. Mean bond strengths for the faculty group were statistically greater than those of the other two groups, which did not differ significantly. Even though the specimen preparation was done under in vitro conditions, the large coefficients of variation indicate it may be difficult to create suitable surface conditions for optimal bonding.