Handling performance of Glass-ionomer Resin Cement

由于这些玻璃离子-树脂水泥（GIRC）是最近才发展起来的，在推荐临床使用之前，有必要研究它们的物理性质。本课题的第一个目的是研究粉液比和水泥液储存温度对两种GIRC凝结时间的影响。第二个目的是确定P/L比对凝固阶段温度变化的影响。最终目的是确定静载荷在凝固过程中对物理性能和牙本质结合强度的影响。使用的GIRCs为Fuji Lute （GC）和Vitremer luting cement （3M）。Fuji I （GC）和bite ResinCement （TOKUYAMA）作为对照。实验结果如下：1。随着水泥P/L比的降低，girc的凝结时间呈增加的趋势。这种趋势在Vitremer Luting水泥中比Fuji Luting水泥更为明显。水泥液的储存温度对水泥的凝结时间影响不大。Vitremer luringcement和Fuji I在测量开始时记录温度逐渐上升，随后记录温度逐渐下降。与富士琵琶和碧石树脂水泥相比，其峰值温度维持时间更长。富士琵琶和铋石树脂水泥从测量开始温度迅速上升，达到峰值后温度下降。温度保持峰值的时间比Vitremer luting水泥和fuji 1短。另一方面，开始对Vitremer luting水泥和Fuji 1进行测量，随后逐渐降低温度。温度峰值持续时间比富士琵琶和碧石树脂水泥长，温度越高，P/L比越高。固化过程中，随着静载荷的增加，GIRCs的物理性能和牙本质结合强度显著提高。

Since these glass ionomer-resin cements (GIRC) have been developed recently, investigation of their physical properties is necessary before recommending clinical usage. The first purpose of this project was to investigate the influence of powder/liquid ratio and storage temperature of the cement liquid on the setting time of two GIRC.And the second purpose was to determine the influence of P/L ratio on the temperature change during setting phase. And the final purpose was to determine the influence of static load during setting on physical properties and dentin bond strength.GIRCs used were Fuji Lute (GC) and Vitremer luting cement (3M).Fuji I (GC) and Bistite ResinCement (TOKUYAMA) were used as controls.The result were as follows :1. The setting time of the GIRCs showed a tendency to increase as the P/L ratio of the cementdecreased. This tendency was more pronounced for Vitremer Luting Cement than Fuji Lute.2. The storage temperature of the cement liquid had little effect on the setting time of thecements.3. Gradual temperature rise was recorded the beginning of the measurement for Vitremer luringcement and Fuji I, follower by gradual decrease in temperature.The time when the temperatureremained at its peak was longer than Fuji Lute and Bistite Resin Cement.4. A rapid temperature rise was recorded from the beginning of the measurement for Fuji Lute and Bistite Resin Cement, followed by decreasing temperature after reaching its peak. The time when the temperature remained at its peak was shorter than Vitremer luting cement and fuji 1.On the other hand, beginning of the measurment for Vitremer luting cement and Fuji 1, followed by gradual decrease in temperature. The time when the temperature remained at its peak was longer than Fuji lute and Bistite Resin CemenHigher temperature was recorded with increasing P/L ratio for all GIRCs tested.5. Physical properties and dentin bond strength of GIRCs were significantly increased with increasing static load during setting.