玷污层对根尖微渗漏的影响  

The effect of smear layer on apical microleakage

作　　者：谢晓莉[1] 陈敏慜[1] 刘柳慧[1] 殷凌云[1] 姜艳[1] 

机构地区：[1]中南大学湘雅医院口腔科,湖南长沙410008

出　　处：《上海口腔医学》2008年第6期616-620,共5页Shanghai Journal of Stomatology

基　　金：湖南省科技厅资助项目(05TH4007)~~

摘　　要：目的:利用扫描电镜和葡萄糖定量法评价玷污层对离体牙根管充填后根尖微渗漏的影响。方法:选取51颗单直根管离体牙,随机分为5组进行根管预备,并按分组进行根管冲洗。A组(11颗)——17%乙二胺四乙酸和1%次氯酸钠,B组(11颗)——1%盐酸四环素和1%次氯酸钠,C组(11颗)——10%枸橼酸和1%次氯酸钠,D组(9颗)——1%次氯酸钠,E组(9颗)——生理盐水。每组各选取1个样本进行扫描电镜观察,其余样本进行根管侧压充填。于第1、2、4、7、10、15、20、30天用葡萄糖氧化酶法测定从冠方向根方渗漏的葡萄糖量。实验数据采用SPSS16.0软件包进行重复测量数据的方差分析和SNK-q检验。结果:A、B、C组根管无玷污层结构,微渗漏量较D、E组小(P<0.05);D、E组根管玷污层多,微渗漏量大,E组微渗漏量大于D组(P<0.05)。结论:去除玷污层可有效减少微渗漏的发生。PURPOSE： To evaluate the effect of smear layer on apical microleakage in extracted root-filled teeth by SEM and glucose penetration model. METHODS： 51 straight single-rooted human teeth were randomly divided into 5 groups, instrumented and irrigated differently by groups. 11 teeth in group A were irrigated with 17% EDTA and 1% NaClO,11 teeth in group B with 1% tetracycline hydrochloride and 1% NaClO,11 teeth in group C with 10% citric acid and 1% NaClO, 9 teeth in group D with 1% NaClO only and 9 teeth in group E with 0.9% NaCI. One tooth in each group was observed under scanning electron microscopy. The other teeth were obturated using lateral condensation technique. Leakage along the root filling was measured by the concentration of glucose in apical reservoir at 1, 2, 4, 7, 10, 15, 20 and 30 days respectively with glucose oxidase method. The data were analyzed with repeated measure ANOVA and SNK-q test using SPSS 16.0 software package. RESULTS： No smear layer on the root canal wall was observed in group A, B and C, the leakage was lower than that in group D and E （P〈0.05）. The smear layer occurred in quantity in group D, E and their leakage increased. The microleakage was higher in group E than that in group D （P〈0.05）. CONCLUSION： Removal of smear layer on the root canal wall could reduce the root apical microleakage.

关 键 词：玷污层 微渗漏 扫描电镜 葡萄糖氧化酶法 

分 类 号：R781.05[医药卫生—口腔医学]