含固位型填料光固化复合树脂的流变特性  

Rheological properties of photo-polymerized composite resin reinforced with retentive filler

作　　者：徐普[1] 徐恒昌[1] 王同[1] 

机构地区：[1]北京大学口腔医学院口腔材料研究室

出　　处：《中华口腔医学杂志》2003年第6期461-463,共3页Chinese Journal of Stomatology

摘　　要：目的　探讨含固位型填料 (retentivefiller,RF)复合树脂的流变性及其与普通填料复合树脂的差异。方法　采用动态应力流变仪DSR 2 0 0 ,在室温 (2 5℃ )时测试含固位型填料复合树脂和普通填料复合树脂的流变性 ,包括黏度、剪切应力和柔量。结果　含固位型填料复合树脂的黏度大于普通填料复合树脂 (P <0 0 1)。随剪切应力的增大 ,前者的黏度开始基本保持不变 ,而后者会降低 ;当剪切应力大于 2 0 3 18Pa时 ,两者的黏度随剪切应力的增大而增加 ;含固位型填料复合树脂的柔量明显小于普通填料复合树脂者 (P <0 0 1)。结论　两种复合树脂的流变性有较大差异 ,因而其临床应用特性也有所不同。Objective To determine the rheological properties of the photo-polymerized composite resin reinforced with retentive filler (RF) and its rheological difference with normal filler (NF) composite resin. Methods Rheological properties of the composite resins, such as viscosity, shear stress and creep compliance, were measured with dynamic stress rheometer at room temperature (25 ℃). Results The viscosity of the composite resin reinforced with RF is higher than that of NF composite resin ( P <0.01); at the beginning, the viscosity of the former has little change with the rising of shear stress and the latter decreases, then the viscosities of the two composite resins increase with the rising of shear stress as soon as over 203.18 Pa of shear stress; the creep compliance of the composite resin reinforced with RF is significant smaller than that of NF composite resin ( P <0.01). Conclusions The rheological properties of the two composite resins have significant difference, so they have different clinical using properties.

关 键 词：含固位型填料 光固化复合树脂 RF 动态应力 流变性 牙科材料 

分 类 号：R783.1[医药卫生—口腔医学]