根尖预备尺寸对玷污层清除效果的比较研究

口腔医学研究 ›› 2015, Vol. 31 ›› Issue (2): 160-162.

根尖预备尺寸对玷污层清除效果的比较研究

苗晖,郭香君,陈敏,吴丽更^*

天津医科大学口腔医院牙体牙髓科天津 300070

收稿日期:2014-07-14 出版日期:2015-02-28 发布日期:2016-04-29
通讯作者: 吴丽更,E-mail: zbwlg5647@sina.com
作者简介:苗晖(1988~ ),女,天津人,硕士在读,主要从事牙体牙髓病学临床研究。
基金资助:
天津市卫生局科技基金课题(2010KZ102)

Effectiveness of Apical Preparation Size on the Removal of Smear Layer.

MIAO Hui, GUO Xiang-jun, CHEN Min, et al

Department of Endodontics,School of Stomatology,Tianjin Medical University, Tianjin 300070

Received:2014-07-14 Online:2015-02-28 Published:2016-04-29

摘要/Abstract

摘要： 目的:比较5种不同根尖预备方案对根管玷污层的清除效果。方法:将50颗单根管上颌离体前牙随机分为5组,A组:采用机动ProTaper系统将根尖预备至25^#(F2),配合次氯酸钠+EDTA冲洗;B组:根尖预备至30^#(F3),预备及冲洗方法同A组;C组:采用机动ProTaper系统将根尖预备至F3,后用不锈钢K锉预备根尖至35^#,冲洗同A组;D组:采用机动ProTaper系统将根尖预备至F3,后用不锈钢K锉预备根尖至40^#,冲洗同A组;E组:根管预备同D组,冲洗用蒸馏水。利用热场发射扫描电子显微镜,评估玷污层清除情况。结果:B组、C组和D组均明显优于A组 (P<0.05);A组、B组、C组和D组明显优于对照E组(P<0.05)。结论:机动ProTaper将根管预备至30^#,可使足量的冲洗液渗入根尖1/3区,有效去除玷污层及碎屑。

关键词: 根尖预备尺寸, 根管冲洗, 根管预备, 次氯酸钠, 玷污层

Abstract: Objective: To compare the effect of five different apical preparation protocols in smear layer removal. Methods: Fifty extracted single-rooted maxillary anterior teeth were randomly divided into five groups,group A: root canals were prepared to 25^#(F2) by ProTaper system,and irrigated by NaOCl and EDTA; group B: root canals were prepared to 30^#(F3),and the preparation and irrigation protocols were same as group A; group C: root canals were prepared to 30^#(F3) by ProTaper system,and then the apical size enlarged to 35^#bystainless steel K-file.The irrigation protocol was same as group A; group D: root canals were prepared to 30^#(F3) by ProTaper system,and then the apical size enlarged to 40^#bystainless steel K-file.The irrigation protocol was same as group A; group E: root canal preparation was same as group D,and irrigated by distilled water.The samples were examined under a thermal field emission scanning electron microscope. Results: Group B,group C and group D showed lower scores than group A (P<0.05); group A,group B,group C and group D showed lower scores than group E (P<0.05). Conclusion: In smear layer removal,the minimum instrumentation for proper penetration of irrigants to the apical third of the canal is a 30^#file by ProTaper system.

Key words: Apical preparation size, Root canal irrigation, Root canal preparation, NaOCl Smear layer

中图分类号:

R781.05

苗晖,郭香君,陈敏,吴丽更. 根尖预备尺寸对玷污层清除效果的比较研究[J]. 口腔医学研究, 2015, 31(2): 160-162.

MIAO Hui, GUO Xiang-jun, CHEN Min, et al. Effectiveness of Apical Preparation Size on the Removal of Smear Layer.[J]. Journal of Oral Science Research, 2015, 31(2): 160-162.

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