Cicek Orhan, Ozkalayci Nurhat, Yetmez Mehmet
Department of Orthodontics, Faculty of Dentistry, Zonguldak Bulent Ecevit University, 67600 Zonguldak, Turkey.
Department of Mechanical Engineering, Faculty of Engineering, Zonguldak Bulent Ecevit University, 67100 Zonguldak, Turkey.
Materials (Basel). 2020 Sep 25;13(19):4280. doi: 10.3390/ma13194280.
Based on the development of many adhesive systems and bonding techniques, bonding strength of orthodontic brackets has become even more important in modern clinical orthodontics. The aim of this study was to determine mean shearing stroke frequency of different orthodontic bracket types and bonding agents under cycling loading. Therefore, 10 different types of orthodontic bracket from 4 different brands were divided into 2 groups. Two different adhesives, namely Transbond™ XT etch-and-rinse for and Transbond™ Plus self-etching-primer adhesive for were considered. The brackets were tested under cycling loading force of 10-N and a crosshead speed of 300 mm/min and 40 cycle/min. The frequency of strokes that the brackets failed were determined and these data were analyzed by statistical analysis using an independent sample -test and one-way analysis of variance (ANOVA). The level of significance was set at < 0.05. Generally, differences between the frequency of shearing strokes of the bracket failures were found to be statistically significant depending on the type of adhesives and brackets ( < 0.05). The bonding technique for Group 1 was found to have a significantly higher shear bonding strength than Group 2. It is also seen that different types of bracket belonging to the same or different brands had different shear bonding strength. It may be concluded that: (i) all bracket types used in this study can be applied with both bonding techniques, (ii) in order to minimize the risk of hard tissue damage, ceramic brackets should be carefully bonded using the self-etching primary adhesive technique.
基于多种粘结系统和粘结技术的发展，正畸托槽的粘结强度在现代临床正畸中变得愈发重要。本研究的目的是确定不同类型正畸托槽和粘结剂在循环加载下的平均剪切冲程频率。因此，将来自4个不同品牌的10种不同类型的正畸托槽分为2组。考虑了两种不同的粘结剂，即用于[具体情况未提及]的Transbond™ XT酸蚀冲洗粘结剂和用于[具体情况未提及]的Transbond™ Plus自酸蚀底漆粘结剂。托槽在10 N的循环加载力、300 mm/min的十字头速度和40次循环/分钟的条件下进行测试。确定托槽失效时的冲程频率，并使用独立样本t检验和单因素方差分析（ANOVA）对这些数据进行统计分析。显著性水平设定为P < 0.05。一般来说，根据粘结剂和托槽的类型，托槽失效时的剪切冲程频率差异具有统计学意义（P < 0.05）。发现第1组的粘结技术具有比第2组显著更高的剪切粘结强度。还可以看出，属于同一或不同品牌的不同类型托槽具有不同的剪切粘结强度。可以得出以下结论：（i）本研究中使用的所有托槽类型都可以采用两种粘结技术；（ii）为了将硬组织损伤的风险降至最低，应使用自酸蚀底漆粘结技术小心粘结陶瓷托槽。
