不同根管预备方法和充填技术组合对根尖微渗漏和牙根抗折强度的影响  

Influence of different combinations of root canal preparation and filling technology on micro leakage from root tip and tooth root's bending strength

作　　者：曹纯芳 吴永正[1] 吕陶红[1] 吴华英[1] 

机构地区：[1]南京市妇幼保健院口腔科,江苏南京210029

出　　处：《口腔医学》2015年第3期183-186,共4页Stomatology

摘　　要：目的探讨几种根管预备方法和充填技术组合对根尖微渗漏和牙根抗折强度的影响。方法选取离体牙186颗,随机分为6个实验组(A、B、C、D、E、F,每组各30颗牙)和阳性、阴性对照组(G、H,每组3颗牙)。A、B、C组采用逐步深入法进行根管预备,D、E、F组采用逐步后退法。其后,A、D组使用Bee FillTM2in1热牙胶充填系统进行根管充填,B、E组给予Cortisomol糊剂配合热牙胶以垂直加压法,C、F组予以Cortisomol糊剂配合冷牙胶以侧方加压法,G、H组均不做任何充填。采用染料渗透法检测各组离体牙根尖微渗漏情况,对各组离体牙进行纵向抗折强度力学测试。结果相同充填方法下多个预备方法比较,A、B、C组染料渗透长度分别小于D、E、F组(P<0.05),A、B、C组最大抗压负荷分别大于D、E、F组(P<0.05)。相同预备方法下,A组染料渗透长度小于B、C组(P<0.05),D组染料渗透长度小于E、F组(P<0.05);A、B、C组最大抗压负荷依次降低(P<0.05),D、E、F组最大抗压负荷依次降低(P<0.05)。G、H组间最大抗压负荷比较,差异无统计学意义(P>0.05)。结论使用逐步深入法进行根管预备,并联合Bee FillTM2in1热牙胶充填系统应用于根管治疗能够显著减少根尖微渗漏,并提高牙根抗折强度,对根管预备和充填技术的选择具有一定的借鉴意义。Objective To explore the influence on micro leakage from root tip and tooth root＇s bending strength by different combinations of root canal preparation and filling technology. Methods 186 extracted teeth were selected and randomly divided into 6 experimental groups（ A,B,C,D,E,F group,30 teeth per group） and positive,negative control group（ G,H group,3 teeth per group）. Group A,B,C were given root canal preparation by step-down technique,and group D,E,F were given step-back technique. Subsequently,Bee FillTM2in1 teeth filling system was used in group A and D to fill root canal,and group B and E were given Cortisomol paste with warm gutta percha fill with vertical compression method,yet group G and H were not given any filling. The dye penetration method was used to measure root tip＇s micro leakage,and tooth root＇s bending strength was also measured in each group. Results With the same filling method,the dye penetration lengths of group A,B,C were all less than those of group D,E,F respectively（ t = 3. 29 ~ 4. 66,P〈0. 05）,and group A,B,C＇ s maximum compressive loads were higher than those of group D,E,F respectively（ t = 3. 11 ~ 4. 50,P〈0. 05）. With the same preparation methods,dye penetration length in group A was less than that of group B and C（ t = 3. 32 ~ 4. 77,P〈0. 05）,and dye penetration length of group D was less than that of group E and F group（ t = 3. 17 ~ 4. 35,P〈0. 05）. Group A,B,C＇ s maximum compressive load decreased successively（ F = 5. 13,P〈0. 05）,and group D,E,F＇ s maximum compressive load also decreased（ F = 4. 87,P〈0. 05）,yet there was no statistical difference in maximum compressive load between group G and H（ t = 0. 00,P〉0. 05）. Conclusions The use of root canal preparation with step-down technique,and Bee FillTM2in1 teeth filling system can effectively reduce micro leakage from root tip and improve tooth root＇s bending strength,which has reference value for selection of root canal preparation and filling techniques.

关 键 词：根管治疗 根管预备 充填技术 微渗漏 抗折强度 

分 类 号：R781.05[医药卫生—口腔医学]