Millett D, McCabe J F, Gordon P H
Department of Child Dental Health, Dental School, Newcastle upon Tyne.
Br J Orthod. 1993 May;20(2):117-22. doi: 10.1179/bjo.20.2.117.
A laboratory investigation of the shear bond strength of stainless steel brackets applied with glass ionomer cement (Ketac-Cem) and a conventional adhesive (Right-on) is described. Sandblasting of the bracket base was undertaken in half of the sample bonded with Ketac-Cem and produced a significant reduction in the probability of failure relative to the unsandblasted sample. Brackets with sandblasted and unsandblasted bases, bonded with Ketac-Cem were subjected to mechanical fatigue in a ball mill for a total of 20 hours. Mean survival time (MST) was then calculated for each group and was found to be significantly improved by sandblasting of the bracket base (P < 0.01).
本文描述了一项关于使用玻璃离子水门汀（Ketac-Cem）和传统粘合剂（Right-on）粘贴不锈钢托槽的剪切粘结强度的实验室研究。在使用Ketac-Cem粘贴的一半样本中，对托槽底部进行了喷砂处理，与未喷砂处理的样本相比，失败概率显著降低。使用Ketac-Cem粘贴的喷砂和未喷砂托槽在球磨机中进行了总共20小时的机械疲劳试验。然后计算每组的平均存活时间（MST），发现托槽底部喷砂处理后平均存活时间显著提高（P < 0.01）。
