Muchitsch A P, Droschl H, Bantleon H P
Fortschr Kieferorthop. 1989 Feb;50(1):65-74. doi: 10.1007/BF02166851.
During a one-year observation period eleven patients treated with fixed appliances and 164 brackets which had been bonded in pairs, were checked at periodic intervals. Every patient had brackets positioned on the teeth in the first and fourth quadrant without graphite marking and in the second and third quadrant with graphite marking. In a parallel in-vitro study with eight pairs of teeth the above described conditions were applied. These specimens were examined in an universal testing machine in order to determine the magnitude of the shear forces. In the in-vivo as well as in the in-vitro study no statistically significant correlations were revealed between the graphite marking and the durability of adhesion as well as the required shear force of the examined brackets. Utilising light microscopy studies, the penetration of adhesive was determined in relation to the position of the graphite marking in etched enamel; at was harmlessness of the reference medium.
在为期一年的观察期内，对11名接受固定矫治器治疗且已成对粘结164个托槽的患者进行定期检查。每位患者在第一和第四象限的牙齿上粘结未涂石墨标记的托槽，在第二和第三象限的牙齿上粘结涂有石墨标记的托槽。在一项对八对牙齿进行的平行体外研究中，采用了上述条件。将这些标本在万能试验机中进行检查，以确定剪切力的大小。在体内和体外研究中，均未发现石墨标记与所检查托槽的粘结耐久性以及所需剪切力之间存在统计学上的显著相关性。利用光学显微镜研究，确定了粘结剂在蚀刻牙釉质中相对于石墨标记位置的渗透情况；同时确定了参考介质的无害性。
