摘要
目的:研究二氧化硅(SiO2)纳米颗粒对聚甲基丙烯酸甲酯(PMMA)义齿材料的影响,为研制性能优越的纳米义齿复合材料提供基础理论依据。方法:采用气流分散法将一定浓度比例的SiO2纳米颗粒在PMMA义齿材料中进行分散,将所得的PMMA/SiO2纳米义齿复合材料以及未添加SiO2纳米颗粒的普通PMMA义齿材料分别按照临床制作义齿的方法进行聚合,制作成力学性能测试的标准试件,对各组试件的抗弯强度、拉伸强度、硬度、摩擦磨耗性能等力学参数进行测试,对实验数据进行统计学分析。结果:添加SiO2纳米颗粒浓度为3%(wt%)的PMMA/SiO2纳米义齿复合材料与普通PMMA义齿材料相比,力学性能均有不同程度的提高(P﹤0.01)。结论:无机纳米粒子填充聚合物材料能提高材料的力学性能。把SiO2纳米颗粒添加到PMMA义齿材料中制成PMMA/SiO2纳米复合材料,可使材料的抗弯强度、拉伸强度、硬度及耐磨性等力学特性明显提高,获得性能优异的纳米义齿复合材料。
Objective： To study the efficiency of SiO2 nanometer grains on the strength and toughness of PMMA denture resin materials and to provide theoretical basement for the synthesis of denture nanocomposites materials with good physicalmechanical properties. Methods： SiO2 nanometer grains were mixed into PMMA denture materials through air-flow disperse method. According to traditional method of making denture in clinic, standard samples of PMMA/SiO2 denture nanocomposites materials were made. Then the mechanical properties including bending strength,tensile strength,hardness and wearing resistance were tested, the results were analyzed through using statistical methods and provide theoretical basement for the clinical application. Results：Compared with traditional PMMA denture material, all mechanical properties of PMMA/SiO2 denture nanocomposites with 3% （wt%） of SiO2 nanometer grains were increased （P 〈 0.01）. The bending and tension strength,hardness and wearing resistance were all improved. Conclusion： The rigidity and abridgement are improved when nanometer inorganic particles are filled in polymer materials.The bending strength,tension strength, hardness and wearing resistance of the new PMMA/SiO2 nanocomposite are obviously enhanced. The denture resin nanocomposite materials have outstanding properties.
出处
《天津医科大学学报》
2007年第4期493-496,共4页
Journal of Tianjin Medical University
基金
天津市教委科技发展基金资助项目(086-200004)
