Hu Wei, Wang Qin, Fu Min-kui, Cheng Chuo-yue
Department of Orthodontics, Peking University School of Stomatology, Beijing 100081, China.
Zhonghua Kou Qiang Yi Xue Za Zhi. 2003 Mar;38(2):109-12.
To investigate the resin-modified glass ionomer cement for inhibition of enamel demineralization adjacent to orthodontic brackets under a pH cycling experiment.
The study used 5 pairs of extracted human premolars. The experiment teeth were bonded with resin-modified glass ionomer, the control teeth were bonded with composite resin. All samples were under the pH cycling experiment each day for 60 days. Demineralization lesions of enamel adjacent to orthodontic brackets were evaluated with polarized light microscopy. The depth and area of the lesion, and the distance between the edge of the adhesive on the enamel surface and the border of the lesion were measured.
The depth and area of lesions of control were greater than those of experiment group were. Paired t test showed significant differences (p < 0.001). There was always a distance between the lesions border and the glass ionomer cement. In control group, all lesions were developed under the edge of composite resin.
It was suggested that resin-modified glass ionomer may become an orthodontic bonding agent to minimize enamel demineralization.
在pH循环实验下，研究树脂改性玻璃离子水门汀对正畸托槽周围釉质脱矿的抑制作用。
本研究使用了5对拔除的人类前磨牙。实验牙用树脂改性玻璃离子水门汀粘结，对照牙用复合树脂粘结。所有样本每天进行pH循环实验，持续60天。用偏光显微镜评估正畸托槽周围釉质的脱矿损害。测量损害的深度和面积，以及釉质表面粘结剂边缘与损害边界之间的距离。
对照组损害的深度和面积大于实验组。配对t检验显示差异有统计学意义（p<0.001）。损害边界与玻璃离子水门汀之间始终存在一定距离。在对照组中，所有损害均在复合树脂边缘下方形成。
提示树脂改性玻璃离子水门汀可能成为一种正畸粘结剂，以最大限度减少釉质脱矿。
