光固化含氟牙科复合树脂的性能

发布时间：2018-06-20 15:09

本文选题：牙科材料 + 双酚A缩水甘油基异丁烯酸　；参考：《中国组织工程研究》2017年26期

【摘要】：背景:光固化含氟牙科复合材料中的氟能减少和预防龋齿发生,能长期发挥防蛀效果,但有关该材料的制备方法及性能尚缺乏报道。目的:研究光固化含氟科复合树脂的制备方法及性能。方法:将催化剂三乙胺、双酚S、双甲基丙烯酸二缩三乙醇酯、三氟乙酸酐及不同质量分数(5%、10%、15%、20%)的无机填料(改性二氧化硅、羟基磷灰石或二氧化钛)混合,制备光固化含氟科复合树脂材料,检测光固化含氟科复合树脂的拉伸强度、弯曲模量、聚合转化率及吸水率,透射电镜观察其形态。结果与结论:(1)相同质量分数下,羟基磷灰石组拉伸强度高于二氧化硅组(P0.05),二氧化钛组拉伸强度显著高于二氧化硅组、羟基磷灰石组(P0.05);相同质量分数下,羟基磷灰石组与二氧化钛组弯曲模量比较差异无显著性意义(P0.05),二氧化硅组弯曲模量显著高于羟基磷灰石组、二氧化钛组(P0.05);(2)相同质量分数下,二氧化硅组与羟基磷灰石组聚合转化率比较差异无显著性意义(P0.05),二氧化钛组聚合转化率大于二氧化硅组、羟基磷灰石组(P0.05);(3)随着改进材料质量分数的不断增加,光固含氟牙科复合树脂材料的吸水率不断增加;(4)透射电镜显示,二氧化硅组断裂面相对平整,树脂机体与填料之间具备良好的生物相容性;羟基磷灰石组断裂面较粗糙,高低起伏明显,生物相容性相对较差;二氧化钛组断裂面形成分层,填料在树脂机体中发生沉降,二氧化钛颗粒沉附在树脂底部,产生较大的空洞和填料颗粒,生物相容性较差;(5)结果表明:光固化含氟科复合树脂具有良好的力学性能、固化性能及吸收率。
[Abstract]:Background: fluorine in light-cured dental composites containing fluorine can reduce and prevent dental caries for a long time, but the preparation methods and properties of the materials are not reported. Objective: to study the preparation method and properties of photocurable fluorinated composite resin. Methods: the inorganic fillers (modified silica, hydroxyapatite or titanium dioxide) were mixed with catalyst triethylamine, bisphenol S, triethanol dimethacrylate, trifluoroacetic anhydride and different mass fractions of 51010 and 20%. The light cured fluorine composite resin was prepared. The tensile strength, flexural modulus, polymerization conversion and water absorption of the light cured fluorine composite resin were measured. The morphology of the composite resin was observed by transmission electron microscope (TEM). Results under the same mass fraction, the tensile strength of hydroxyapatite group was higher than that of silica group (P 0.05), the tensile strength of titanium dioxide group was significantly higher than that of silica group, and that of hydroxyapatite group was higher than that of silica group. There was no significant difference in flexural modulus between hydroxyapatite group and titanium dioxide group. The flexural modulus of silica group was significantly higher than that of hydroxyapatite group, and that of titanium dioxide group was higher than that of hydroxyapatite group. There was no significant difference in polymerization conversion between silica group and hydroxyapatite group. The polymerization conversion of titanium dioxide group was higher than that of silica group, and that of hydroxyapatite group was increasing with the increase of mass fraction of modified material. The transmission electron microscope showed that the fracture surface of silica group was relatively flat, the biocompatibility between resin body and filler was good, and the fracture surface of hydroxyapatite group was rough. The fracture surface of the titanium dioxide group is stratified, the filler is subsided in the resin body, and the titanium dioxide particles are deposited on the bottom of the resin, resulting in a large void and filler particles. The results showed that the photocurable fluorine-containing composite resin had good mechanical properties, curing properties and absorptivity.
【作者单位】：河北医科大学第二医院口腔修复科;河北省人民医院口腔科;
【分类号】：R783.1

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