【摘要】 目的研究纳米二氧化钛和纳米二氧化硅粒子对树脂基托材料机械性能和抗菌性能的影响。方法将纳米二氧化钛和纳米二氧化硅粒子添加到热固化型聚甲基丙烯酸甲酯义齿基托树脂中,制成标准试件,利用电子万能试验机和耐磨擦试验机分别対试件拉伸强度,耐摩擦等性能进行测试;并利用薄膜密着法在体外对白色念珠菌和变形链球菌的抗菌活性进行测试。结果纳米二氧化钛粒子的添加使义齿树脂基托抗菌性能得到提高,纳米二氧化硅粒子的添加使义齿树脂基托拉伸强度等指标均得到提高,同时耐摩擦性能也得到提高。两种纳米粒子按一定比例混合可使义齿树脂基托材料拉伸,耐摩擦及抗菌等性能均得到一定程度的提高。结论纳米二氧化钛和纳米二氧化硅粒子可改进树脂基托材料的机械性能和抗菌性能,从而可以获得性能优异的纳米义齿复合材料。更多还原

【Abstract】 Objective To investigate the effects of nano-titanium dioxide and nano-silicon dioxide particles on the mechanical and antimicrobial properties of denture base resin.Methods Nano-titanium dioxide and nano-silicon dioxide particles were introduced to heat-curing denture base resin to prepare composites.Electronic universal testing machine and friction tester were used to test tensile strength and frictional resistance properties of the samples prepared,respectively;besides,film adhesion method was used to test the in-vitro antimicrobial activity against Candida albicans and Streptococcus mutans.Results Addition of nano-titanium dioxide particles improved theantimicrobial property of denture base resin,and addition of nano-silicon dioxide particles improved the tensile strength and frictional resistance of denture base resin.Mixture of the two nano-particles,at a certain ratio,improved the tensile strength,frictional resistance and antimicrobial property of denture base resin at a certain degree.Conclusion Nano-titanium dioxide and nano-silicon dioxide particles could improve the mechanical and antimicrobial properties of denture base resin.A kind of nano-denture compound material with excellent property could be improved.更多还原