Guzman Ulises A, Jerrold Laurance, Vig Peter S, Abdelkarim Ahmad
2500 North State Street, Jackson, MS 39216-4505, USA.
Prog Orthod. 2013 Oct 20;14:39. doi: 10.1186/2196-1042-14-39.
The purpose of this study was to compare the shear bond strength and adhesive remnant index (ARI) at the enamel-bonding interface of precoated and conventionally bonded brackets, utilizing standardized procedures.
The test sample consisted of 90 recently extracted bovine permanent mandibular incisors. The teeth were bonded using the same protocol and were tested in three different situations. A material testing systems machine was utilized for debonding, and the remaining adhesive on the tooth was recorded.
Immediately after bonding, we found that the shear bond strength of the precoated brackets (6.27 MPa) was significantly higher than that of conventional brackets (5.37 MPa) (p<0.05). However, no significant differences in bond strength were found between the two bracket systems after 24 h of bonding or after thermocycling. The conventional brackets had higher ARI scores than the precoated bracket systems immediately after bonding and after 24 h.
Since there were no significant differences in the bonding strength after 24 h, the immediate bonding strength of the precoated brackets during the first day does not appear to be a major advantage over the conventional bracket systems. However, less adhesive on the tooth after debonding is an advantage of precoated brackets.
本研究的目的是利用标准化程序，比较预涂覆托槽和传统粘结托槽在釉质粘结界面的剪切粘结强度和粘结剂残留指数（ARI）。
测试样本由90颗近期拔除的牛下颌恒切牙组成。使用相同方案粘结牙齿，并在三种不同情况下进行测试。使用材料测试系统机器进行脱粘，并记录牙齿上剩余的粘结剂。
粘结后立即发现，预涂覆托槽的剪切粘结强度（6.27MPa）显著高于传统托槽（5.37MPa）（p<0.05）。然而，粘结24小时后或热循环后，两种托槽系统的粘结强度没有显著差异。粘结后立即和24小时后，传统托槽的ARI评分高于预涂覆托槽系统。
由于24小时后粘结强度没有显著差异，预涂覆托槽第一天的即时粘结强度似乎并不比传统托槽系统有主要优势。然而，脱粘后牙齿上的粘结剂较少是预涂覆托槽的一个优势。
