Because of their low fracture strength, glass ionomer cements (GICs) can not be applied to the high stress loading areas in dentistry. With the aim to improve the fracture properties of GICs, carboxymethyl chitosan (CMCS) was dissolved in the liquid part of a commercial GIC, Fuji IX, and then mixed with inorganic particles to prepare GICs containing CMCS. The mechanical performance of the GICs containing CMCS showed that the CMCS could enhance the fracture properties of GICs when its concentration in the GICs was in a certain range; 0.0125 wt.% of CMCS in the liquid part of GIC improved both the flexural strength and the fracture toughness. The flexural strength, flexural modulus, and compressive strength results of the GICs containing CMCS after water aging showed that they also had good water aging-resistance.

由于其低的断裂强度，玻璃离子水泥（GIC）无法应用于牙科的高应力负荷区域。为了改善GIC的断裂特性，将羧甲基壳聚糖（CMCS）溶解在商品化GIC Fuji IX的液体部分中，然后与无机颗粒混合以制备含CMCS的GIC。含CMCS的GIC的力学性能表明，当CMCS在GIC中的浓度在一定范围内时，CMCS可以增强其断裂性能。GIC液体部分中的0.0125 wt。％CMCS既提高了弯曲强度，又提高了断裂韧性。含有CMCS的GIC在水老化后的抗弯强度，弯曲模量和抗压强度结果表明，它们也具有良好的耐水老化性。