含RF填料的未聚合光固化复合树脂动态黏弹性和临床操作性能  

Dynamic Viscoelasticity of Unpolymerized Light-Cured Composite Resin Reinforced with Retentive Filler and Clinical Manipulation Property.

作　　者：徐普[1] 徐恒昌[2] 王同[2] 

机构地区：[1]中南大学湘雅医学院附属海口医院口腔医学中心,海口570208 [2]北京大学口腔医学院口腔材料研究室

出　　处：《医学研究杂志》2008年第1期60-63,共4页Journal of Medical Research

基　　金：2005海南省卫生厅科研项目(琼卫2005-25号)

摘　　要：目的探讨含固位型填料(retentive filler,RF)和普通填料(normal filler,NF)增强的未聚合光固化复合树脂的动态黏弹性及其对树脂临床操作性能的影响。方法采用动态应力流变仪DSR-200测试含有RF填料和NF填料的未聚合光固化复合树脂的动态黏弹性质;用流动性、充填性、成形性和稳定性描述复合树脂的临床操作性能。结果复合树脂的动态黏弹性对角频率敏感,含RF填料和含NF填料的复合树脂相比,有更高的剪切贮能模量(G′)、剪切损耗模量(G″)和较低的损耗角(tanδ),所以前者弹性更高,后者黏性更大。临床发现含RF填料的复合树脂有更高的稳定性和成形性,而含NF填料的复合树脂则有比较高的流动能力和对窝洞的适应性。结论理想复合树脂应该有较高的G′和较低的tanδ。Objective To evaluate the dynamic viscoelasticity of unpolymerized light - cured composite resins reinforced with retentive filler （RF） or normal filler （NF） , and the effect of dynamic viscoelasticity on clinical manipulation. Methods The dynamic viscoelastic properties of two light - cured composite resins reinforced with RF or NF were measured respectively with the dynamic stress rheometer. Flowing property, filling capacity, shaping and stability were designed to describe the clinical manipulation of the composites. Resuits The dynamic viscoelastic behavior of the composites is sensitive to changes in frequency, composite resin reinforced with RF had significantly higher shear storage modulus （G′） and shear loss modulus （G＂） than composite resins reinforced with NF, and had significantly lower loss tangent .（ tanδ）. The former was found to be more viscous, and the latter was found to be more elastic. Clinically, composite resin reinforced with RF has a greater ability of stability and shaping, and a lower potential for deformation; composite resin reinforced with NF has a higher flowing ability, and with a good adaptation to the cavity of the tooth. Conclusions The ideal composites should have high G＇ and low tanδ.

关 键 词：牙科材料 复合树脂 固位型填料 黏弹性 操作性能 

分 类 号：R783.3[医药卫生—口腔医学] R783.1[医药卫生—临床医学]