摘要
背景:MTA(Mineral trioxide aggregate)是一种新型的无机三氧化物聚合体,以往研究表明,它作为根尖倒充材料,相比银汞合金、氧化锌丁香油水门汀具有更好的边缘密合性。目的:实验拟观察金属桩钉以MTA粘固后的抗微渗透作用。设计:对比观察性实验。单位:湖北省荆州市中心医院。材料:搜集本院2004年的正畸治疗拔除牙,筛选出牙体完整、牙根粗壮无弯折、无折裂的下颌第一磨牙32颗;MTA(美国Dentsply公司)。用于对照的粘固剂分别为磷酸锌水门汀(上海齿科材料厂)、玻璃离子水门汀(上海青蒲齿科材料厂)、EB复合树脂(解放军第四军医大学口腔医院齿科材料厂)。方法:取出保存的已切除牙冠的32颗离体单根恒牙行根管充填后,分别取模制作镍铬合金铸造桩钉。牙根随机分为磷酸锌水门汀组,玻璃离子水门汀组,EB复合树脂组,MTA组,每组8枚。分别按说明书要求调拌粘固剂,将桩钉粘固于相应的牙根根管内,室温下固化,刮除牙根断面上多余粘固剂。主要观察指标:用染料渗透法检测4种不同粘固剂作为铸造桩钉粘固剂的微渗透情况。结果:用MTA粘固铸造桩定时的微渗透最小,封闭效果最好;用磷酸锌水门汀粘固时的微渗透最大。微渗透深度由浅到深依次为MTA<EB复合树脂<玻璃离子水门汀<磷酸锌水门汀。使用方差分析作组间分析,MTA组与其他3组相比,微渗透性最小,差异有显著性意义(P<0.05)。结论:MTA作为铸造桩钉粘结剂有良好的抗微渗透效果。
BACKGROUND： Mineral trioxide aggregate （MTA） is a new inorganic trioxide polymer. Previous studies indicated that MTA as a root tip material had good edge closeness as compared to silver amalgam and vitreous enamel-cementum. OBJECTIVE： To study the effect of anti-micro-osmosis of metal dowel pins cemented by MTA. DESIGN： Comparative observational study. SETTING： Jingzhou Central Hospital of Hubei Province. MATERIALS： Thirty-two submaxilla first premolars which were pulled out by the orthodontic treatment in 2004 of the hospital were selected, of which teeth were intact, dental roots were stout, straight and unbroken. MTA was provided by Dentsply Co., USA; zinc phosphate cement by Shanghai Dentistry Material Station; glass ionomer cement by Shanghai Qingpu Dentistry Material Station; EB composite resin by the Fourth Military Medical University Oral Medical Hospital. METHODS： Having been filled by traditional technique, 32 fresh single-rooted permanent teeth were randomly divided into 4 groups and cemented in casting dowel pins separately with four cements-zinc phosphate cement, glass ionomer cement, EB composite resin and MTA groups with 8 in each group. And then the dye penetration method was used to test the micro-osmosis of these cements. MAIN OUTCOME MEASURES： Micro-osmosis of the four cements. RESULTS： MAT as a cement had the minimum micro-osmosis while zinc phosphate cement had the maximum osmosis. The depth of osmosis that ranked from minimum to maximum was MTA〈EB composite resin 〈 class ionomer cement 〈 zinc phosphate cement. The between group variance was analyzed with the method of ANOVA and worked out that group D had the significant difference from other groups （P 〈 0.05）. CONCLUSION： MAT as a cement of casting dowel pins has a good anti-micro-osmosis effect.
出处
《中国组织工程研究与临床康复》
CAS
CSCD
北大核心
2008年第19期3799-3800,共2页
Journal of Clinical Rehabilitative Tissue Engineering Research
