摘要
目的:评价纳米二氧化钛和纤维素共掺杂对玻璃离子水门汀机械性能及抗菌效果的影响。方法:实验共分3组,2wt%二氧化钛组(T)、2wt%二氧化钛+0.4wt%纳米纤维素的共掺杂组(C)以及未改性水门汀的对照组(CG)。利用万能材料试验机、摩擦磨损试验机分别测试各组材料的抗压性能、摩擦系数和磨损量,菌落计数法评价材料对白色念珠菌的抗菌效果。结果:与未改性组相比,共掺杂组的抗压强度提高了21.8%(P<0.001);磨损量降低为35.9%(P<0.001);抗菌效果提高到92.3%(P<0.001)。扫描电镜可见C组的裂纹显著减少。结论:纳米纤维素和纳米二氧化钛共掺杂显著提高了玻璃离子水门汀的抗压性能、耐磨性以及抗菌效果。
Objective：To explore the effect of co-doping with TiO2 nanoparticles and sisal cellulose nanocrystals（CNCs）on the physical and antibacterial properties of a conventional glass-ionomer cement（GIC）.Methods：Test samples were divided into three groups：2 wt.%titanium dioxide group（T）,2 wt.%titanium dioxide＋ 0.4 wt.%CNCs co-doped group（C）,and unmodified cement control group（CG）.The samples were subjected to mechanical tests to evaluate the compressive strength and wear resistance.Antimicrobial activity was evaluated against candida albicans.Results：Compared with the control group,the co-doped group demonstrated an increased compressive strength of 21.8%（P〈0.001）,the volume wear rate was reduced to 35.9%（P〈0.001）.The antibacterial effect against candida albicans was increased to 92.3%（P〈0.001）.Scanning electron microscopy showed a significant reduction of cracks in group C.Conclusion：The co-doping of CNCs and TiO2 nanoparticles significantly improve the compressive properties,abrasion resistance,and antibacterial effect of GIC.
作者
孙兢
朱博武
杨蕾
林永盛
曹宝成
SUN Jing;ZHU Bo - wu;YANG Lei;LIN Yong-- sheng;CAO Bao- cheng(Department of Orthodontics, School of Stomatology , Lanzhou University, Lanzhou 730000, China;Key Lab of Stomatology of State Ethnic Affair Commission, Northwest University for Nationalities, Lanzhou 730030, China.)
出处
《口腔医学研究》
CAS
北大核心
2018年第5期509-512,共4页
Journal of Oral Science Research
基金
甘肃省自然科学基金(编号:1208RJZA236)
甘肃省科技支撑计划(编号:1604FKCA089
1504FKCA095)
兰州大学中央高校基本科研业务费专项资金(编号:lzujbky-2017-it48)
关键词
玻璃离子水门汀
纳米粒子
力学
抗菌
Glass-ionomercement Nanoparticles Mechanics Antimicrobial
