螺环原酸酯对牙科基体树脂的改性研究  

Study on dental matrix resin modified with spiro orthoester

作　　者：付静[1] 贾芳[1] 刘小青[1] 

机构地区：[1]口腔疾病研究国家重点实验室.四川大学华西口腔医学院,四川成都610041

出　　处：《临床口腔医学杂志》2010年第2期80-83,共4页Journal of Clinical Stomatology

基　　金：国家自然科学基金资助项目(50673065)

摘　　要：目的:用螺环原酸酯膨胀单体对牙科BisS-GMA基体树脂进行改性的研究。方法:分别以BisS-GMA和Bis-GMA作树脂基质,TEGDMA为稀释单体,加入和不加入螺环原酸酯膨胀单体,配制四种基体树脂。以CQ/DMAEMA为光引发体系,光固化后测定并比较其体积收缩率、聚合转化率、粘接拉伸强度和固化时间。结果:含膨胀单体的BisS-GMA基体树脂的体积收缩率较低,聚合转化率和粘接拉伸强度较高,且固化时间合适。结论:螺环原酸酯膨胀单体的开环聚合反应能使BisS-GMA基体树脂的体积收缩率显著降低,并能提高其聚合转化率和粘接拉伸强度。Objective：Modification of dental BisS-GMA matrix resin with spiro orthoester was researched.Method：BisS-GMA and Bis-GMA were used as resin matrix respectively,with TEGDMA as diluent,added expanding monomer or not,then four groups of matrix resins were prepared.CQ/DMAEMA were used as photoinitiation system to initiate the copolymerization of matrix resin.Tested and compared volumetric shrinkage,the degree of conversion,tensile bond strength and curing time.Result：The volumetric shrinkage of the BisS-GMA matrix resin containing expanding monomer was lower,the degree of conversion and tensile bond strength were improved;and had a applicable curing time.Conclusion：The ringopening polymerization of spiro orthoester expanding monomer contributed to the lowest volumetric shrinkage;the degree of conversion and tensile bond strength were also enhanced.

关 键 词：螺环原酸酯 牙科基体树脂 体积收缩率 粘接拉伸强度 

分 类 号：R783.1[医药卫生—口腔医学]