诺丽联合EDTA应用对牙本质机械性能的影响  

Effects of Morinda citrifolia combined with EDTA root canal irrigation on the mechanical properties of dentin

作　　者：张岚 李艳萍 何丽娜[1] 潘爽 王冉旭 牛玉梅[1] ZHANG Lan;LI Yanping;HE Lina;PAN Shuang;WANG Ranxu;NIU Yumei(Department of Endodontics,School of Stomatology,Harbin Medical University,Department of Endodontics,the First Affiliated Hospital of Harbin Medical,Harbin 150001,China)

机构地区：[1]哈尔滨医科大学附属口腔医院牙体牙髓科,哈尔滨医科大学附属第一医院牙体牙髓科,黑龙江哈尔滨150001

出　　处：《口腔医学》2023年第8期690-696,共7页Stomatology

摘　　要：目的研究诺丽提取物溶液(Morinda citrifolia juice,MCJ)联合EDTA对牙本质机械性能的影响,评估MCJ作为根管冲洗液应用于根管治疗的效果。方法选取21颗人单根前磨牙和36颗人第三磨牙,根据冲洗液不同随机分为阴性对照组和5个实验组。阴性对照组:蒸馏水;实验组:A组5.25%NaClO、B组6%MCJ、C组17%EDTA、D组5.25%NaClO-17%EDTA、E组6%MCJ-17%EDTA。随机取12颗人单根前磨牙,近远中向劈开,每个半根为一个样本,共24个样本。不同冲洗液浸泡后进行显微硬度测试;剩余的9颗人单根前磨牙,制备36个沙漏型牙本质样本块,浸泡后进行极限拉伸强度测试;36颗人第三磨牙截根后切割,冠部牙本质制备72个矩形牙本质本块,浸泡后每组随机取6个样本分别进行三点弯曲强度和压缩强度测试。结果(1)根颈1/3区,B、E组牙本质显微硬度明显大于A组、C组和D组(P<0.05);根中1/3区,B组牙本质显微硬度明显大于A、C、D、E组(P<0.05);根尖1/3区,B、E组牙本质显微硬度明显大于A组牙本质显微硬度(P<0.05)。(2)B、D、E组牙本质极限抗拉强度明显高于A、C组(P<0.05)。(3)B组牙本质三点弯曲强度明显高于A、C组,E组牙本质三点弯曲强度明显高于D组(P<0.05)。(4)B、E组牙本质压缩强度明显高于A、D组(P<0.05)。结论诺丽对牙本质机械性能的影响小于5.25%NaClO;诺丽联合17%EDTA应用对牙本质机械性能的影响小于5.25%NaClO联合17%EDTA。Objective To study the effect of Morinda citrifolia juice combined with EDTA on the mechanical properties of dentin,and evaluate the application prospect of MCJ as a root canal irrigation solution.Methods Twenty⁃one human single⁃rooted premolars and 36 human third molars were selected and randomly divided into negative control group and five experimental groups according to different immersion protocols.Negative control group:distilled water;experimental group:5.25%NaClO in group A,6%MCJ in group B,17%EDTA in group C,5.25%NaClO⁃17%EDTA in group D,and 6%MCJ⁃17%EDTA in group E.12 human single⁃rooted pre⁃molars were randomly selected and split in the mesio⁃distal direction.Each half root was one sample,so there were a total of 24 sam⁃ples.They were randomly divided into 6 groups,and 4 samples from each group for micro⁃hardness test.The remaining 9 human single⁃rooted premolars were split mesio⁃distally to prepare 36 hourglass dentin sample blocks,and 6 samples were randomly selected from each group for ultimate tensile strength test.After root resection of 36 human third molars,coronal dentin prepared 72 rectangular den⁃tin blocks.After immersion,6 samples were randomly selected from each group for flexural strength and compressive strength tests,re⁃spectively.Results①In the crown 1/3 area,the dentin micro⁃hardness in groups B and E were significantly greater than that in groups A,C and D(P<0.05);in the middle 1/3 area of the root,the dentin micro⁃hardness in group B was significantly greater than that in groups A,C,D,and E(P<0.05);in the apical 1/3 area,the dentin micro⁃hardness in groups B and E were significantly grea⁃ter than that in group A(P<0.05).②The ultimate tensile strength of dentin in groups B,D and E were significantly higher than that in groups A and C(P<0.05).③The dentin flexural strength of group B was significantly higher than that of groups A and C,and the den⁃tin flexural strength of group E was significantly higher than that of group D(P<0.05).④The dent

关 键 词：根管冲洗 诺丽 机械性能 

分 类 号：R781.05[医药卫生—口腔医学]