不同开髓方法对下颌恒切牙根管预备的影响  

The effects on root canal preparation of the mandibular permanent incisors with different endodontic access opening

作　　者：刘青梅 王俊 程珏[2] 杨计亮[2] 刘名燕 

机构地区：[1]山西大医院口腔科,太原030032 [2]山西省人民医院口腔内科,太原030012

出　　处：《口腔医学》2013年第9期619-622,共4页Stomatology

摘　　要：目的研究下颌切牙采用唇侧和舌侧开髓方法进行根管预备后管壁清洁度的差异。方法 18对离体下颌切牙随机分为A、B两组,每组中每对牙齿1颗采用唇侧开髓,另1颗采用舌侧开髓。A组用镍钛器械进行根管预备,B组用不锈钢器械进行根管预备,在扫描电镜下观察比较管壁清洁度。结果①各组的管壁清洁度均为根冠1/3>根中1/3>根尖1/3;②在根冠1/3段,各组间清洁度均无显著性差异(P>0.05)。③在根中1/3段,B组采用舌侧开髓法的管壁清洁度最差(P<0.05),其它各组间无显著性差异(P>0.05);④在根尖1/3段,A组管壁清洁度优于B组(P<0.05),B组中舌侧开髓法的预备效果最差(P<0.05)。结论下颌切牙采用唇侧开髓法有助于提高根管预备的效果,结合镍钛器械可取得最佳的根管预备效果。Objective To evaluate the difference in cleaning degree of the root canal walls of the mandibular incisors between labial access opening and lingual access opening. Methods 8 pairs of extracted mandibular incisors were randomly divided into group A and B. In each pair of teeth, perform labial access opening and lingual access opening separately on the two teeth to prepare root canals, and use nickel-titanium instruments for group A, stainless steel instrument for group B. Then observe the cleaning effect of the root ca- nal wails under the scanning electron microscopy（SEM）. Results （1）The cleaning effect of root canal walls in all groups was the crown 1/3 〉 middle 1/3 〉 apical 1/3. （2）In the crown 1/3, there was no significant difference in the cleaning effect of root canal walls among the groups（ P 〉 0.05 ）. （3）In the middle 1/3, group B with lingual access opening was the worst（ P 〈 0.05 ） , and there was no significant difference among other groups（ P 〉 0.05 ）. （4）In the apical 1/3, group A was superior to group B （P 〈 0.05 ） , and group B with lingual access opening was the worst（P 〈 0.05）. Conclusions The labial access opening contributes to improving the effect of root canal preparation of the mandibular incisors, combining nickel-titanium instruments to achieve the best effeet.

关 键 词：下颌切牙 唇侧开髓 根管预备 清洁度 扫描电镜 

分 类 号：R781.05[医药卫生—口腔医学]