EDTA预处理对牙颈部非龋性硬化牙本质粘接效果的影响  

Effect of EDTA Pretreatment on Dentin Bonding in Non-carious Sclerosis of Tooth Neck

作　　者：曹白雨[1] 林毅[1] 徐洁[1] CAO Baiyu;LIN Yi;XU Jie(Department of Stomatology,Provincial Hospital of Fujian,Fuzhou 350001,China)

机构地区：[1]福建省立医院口腔科

出　　处：《口腔医学研究》2019年第8期757-760,共4页Journal of Oral Science Research

基　　金：2016年五类省卫生计生科研人才培养项目(编号:2016-2-3)

摘　　要：目的:探讨EDTA预处理对牙颈部非龋性硬化牙本质粘接效果的影响。方法:随机将40颗由于牙周病而拔除的具备代表性的楔状缺损无龋前磨分成4组(C1、C2、C3、C4),每组10颗,依次开展如下的3个实验:(a)①用不同浓度的EDTA(10%、15%、20%)对C1、C2、C3组处理60s,用35%的磷酸处理C4组30s;②用EasyOne粘接剂粘接,分层充填树脂并光照,冷热循环5000次,观察分析各组粘接界面的断裂模式和粘接强度;(b)①同前;②溶有0.1%罗丹明B的EasyOne粘接剂粘接,分层充填树脂并光照;③CLSM观察分析各组混合层厚度和树脂突长度;(c)①同前;②EasyOne粘接剂粘接,分层充填树脂并光照;③浸泡于0.1%罗丹明B的50%酒精溶液中冷热循环5000次;④CLSM观察分析各组微渗漏长度。结果:EDTA浓度愈大,所达到的牙颈部非龋性硬化牙本质(cervicalscl erotic dentin,CSD)粘接效果愈为明显,混合层与树脂突的质量也愈高,树脂与CSD的结合更加地紧密,强化树脂对CSD的渗透,减少粘接界面微渗漏的发生,即不同组别存在着统计学差异(P<0.05)。结论:EDTA可作为一种CSD表面预处理剂,大量应用于临床,降低CSD树脂粘接的失败率。Objective:To investigate the effect of EDTA pretreatment on dentin bonding in non-carious sclerosis of tooth neck.Methods:40 teeth with representative wedge-shaped defects extracted from periodontal disease patients were randomly divided into four groups (C1,C2,C3,and C4),10 in each group.Three experiments were carried out as follows:(a) the teeth were treated with different concentrations of EDTA (10%,15%,20%) for 60 s and 35% phosphoric acid for 30 s;then coated with Easy One adhesive,filled with resin,and hot and cold treated for 5000 cycles.The fracture mode and bonding strength of the bonding interface were observed;(b) the same as (a) except the Easy One adhesive with 0.1% rhodamine B;(c) the same as (a) except that the filled teeth were immersed in the 50% alcohol solution with 0.1% Rhodamine B and then performed 5000 cycles of cold and hot cycles.Results:The higher the concentration of EDTA,the more obvious the bonding effect of cervical sclerotic dentin (CSD), the higher the quality of mixed layer and resin protrusion,the closer the bonding between resin and CSD,the stronger the penetration of resin into CSD,and the less the microleakage of bonding interface ( P <0.05).Conclusion:EDTA can be used as a surface pretreatment agent for CSD and can be widely used in the clinic to reduce the failure rate of CSD resin bonding.

关 键 词：EDTA预处理 CSD 粘接效果 

分 类 号：R783.1[医药卫生—口腔医学]