Operative Dentistry Department, Faculty of Dentistry, Ain Shams University, Cairo, Egypt.
Braz Oral Res. 2012 Sep-Oct;26(5):418-23. doi: 10.1590/s1806-83242012005000013. Epub 2012 Jul 19.
We evaluated the effects of air-drying distance and bond surface area on the shear bond strength of a 2-step etch-and-rinse adhesive. A total of 120 bovine anterior teeth were equally divided into 6 main groups based on bonding surface area. The main groups were divided into sub-groups (n = 5) according to air-drying distance. The shear strength was determined using a universal testing machine at a crosshead speed of 0.5 mm/min. The averaged results were subjected to two-way ANOVA and Tukey's test (α = 0.05). Two-way ANOVA testing identified no significant cross-product interactions (p > 0.05), but the main factors of area (p < 0.0001) and air-drying distance (p < 0.00001) significantly affected the mean bond strength. Shorter air-drying distances improved bond strength, and increased surface area decreased the bond strength.
我们评估了风干距离和粘结面面积对 2 步酸蚀-冲洗粘结剂的剪切粘结强度的影响。根据粘结面面积，将 120 颗牛前牙平均分为 6 个主组。根据风干距离，将主组进一步分为 5 个亚组(n = 5)。使用万能试验机以 0.5mm/min 的十字头速度测定剪切强度。将平均结果进行双因素方差分析和 Tukey 检验(α = 0.05)。双因素方差分析未发现显著的交互作用(p > 0.05)，但面积的主要因素(p < 0.0001)和风干距离的主要因素(p < 0.00001)显著影响平均粘结强度。较短的风干距离可提高粘结强度，而增加粘结面面积则降低粘结强度。
