glass ionomer cement

When zinc phosphate cement was used as the base material, the magnitude of maximum Von Mises stress and maximum tensile stress in enamel and composite restorations were comparatively lower than those of glass ionomer cement and the stress distribution were more equable.

从基底材料看，磷酸锌粘固粉作为基底时，牙釉质、修复体的最大VON MISES应力及最大拉应力较玻璃离子粘固粉作为基底时要小，且应力分布更均匀。

Effect of different pressure time on bond strength of glass ionomer cement

不同加压时间对玻璃离子水门汀粘接强度的影响

Objective To study and shear bond strength of resin-reinforced glass ionomer cement ( RGIC ) on orthodontic brackets.

目的探讨两种树脂加强型玻璃离子水门汀对托槽粘结强度的影响.

Results: There was no significant difference between the effusion of glass ionomer cement and amalgam ( P> 0.05), the effusion of zinc phosphate cement was the most poor in three kinds of filling materials via microleakage ( P < 0.05).

结果：玻璃离子粘固粉与银汞合金的边缘封闭性较好，二者差异无显著性（P>005），而磷酸锌粘固粉边缘封闭最差与前者比较（P