桩道制备后根管冠方渗漏的体外实验

doi:10.3877/cma.j.issn.1674-1366.2008-01-003

中华口腔医学研究杂志(电子版) ›› 2008, Vol. 02 ›› Issue (01) : 10 -13. doi: 10.3877/cma.j.issn.1674-1366.2008-01-003

基础研究

桩道制备后根管冠方渗漏的体外实验

顾申生¹, 梁景平¹^,^†(

), 闫培芳¹

^1. 200011 上海，上海交通大学医学院附属第九人民医院·口腔医学院牙体牙髓科，上海口腔医学研究所

收稿日期:2007-11-30 出版日期:2008-02-01
通信作者: 梁景平
基金资助:
国家科技部“十五”攻关项目（2004BA720A23）

In vitro study of coronal leakage after post space preparation

Shen-sheng GU¹, Jing-ping LIANG¹^,^†(), Pei-fang YAN¹

^1. Department of Operative Dentistry and Endodontics， School of Stomatology， Ninth People's Hospital School of Medicine， Shanghai Jiao Tong University， Shanghai 200011， China

Received:2007-11-30 Published:2008-02-01
Corresponding author: Jing-ping LIANG

全文 ( ) 下载PDF ( ) 导出引用

目的

本实验拟用染色实验，比较根管内牙胶余留全长、3、5、7 mm 两周后的冠方渗漏，为探讨桩道制备后根管充填的封闭性能做一参考。

方法

取86 颗单根离体牙，按照牙胶余留量及暂时充填材料的不同分为8 组，常规根管充填并桩道预备后，用次甲基蓝进行由冠方向根方的渗漏，2 周后测量渗漏深度，统计结果并加以分析。

结果

各组均有渗漏，其中以牙胶封闭且根管内牙胶余留3 mm 组的渗漏距离最大，以氧化锌水门汀封闭且未去除根管内牙胶组的渗漏距离最小。但是8 组的渗漏深度差异无统计学意义（P=0.1033）。

结论

桩道制备会增加根管充填的冠方渗漏，而氧化锌水门汀的封闭性能较牙胶强，但在两周时间内渗漏对根尖部封闭性能影响不大。

关键词: 桩道制备, 冠方渗漏, 染色实验

Objective

To compare the coronal leakage of different length of gutta-percha remnants（full length， 3， 5， 7mm） two weeks after post preparation， using a dye penetration method.

Methods

Eighty-six single-root extracted teeth were divided into eight groups according to the length of gutta-percha remnant and the materials of temporary coronal filling. Teeth were instrumented and obturated in a routine way. Post space was prepared to different depths. Specimens were then submerged in 2% methylene blue dye for two weeks. Dye leakage was measured and statistical analysis was performed.

Results

Dye leakage was observed in all groups. The highest leakage was recorded in group A4 with 3mm-long gutta-percha remnant and coronal sealing of gutta-percha， whereas the lowest leakage was recorded in group B1 with full length of gutta-percha and coronal sealing of ZOE cement. However， there was no statistically significant difference among eight groups （P=0.1033）.

Conclusions

The post space preparation would decrease the sealing ability of root canal filling. Gutta-percha showed poorer sealing ability than ZOE cement as coronal temporary filling materials. However， there was no significant difference between them in 2 weeks.

Key words: Post space preparation, Coronal leakage, Dye penetration method

表1 染料渗漏深度测量结果（mm）

分组	A1	A2	A3	A4	B1	B2	B3	B4
$\bar{x}$ ±s	1.7±0.9	1.8±0.8	2.4±1.1	2.4±1.0	1.4±0.8	1.6±0.9	2.2±0.8	2.3±1.0
SNK分级	A	A	A	A	A	A	A	A

表1 染料渗漏深度测量结果（mm）

分组	A1	A2	A3	A4	B1	B2	B3	B4
$\bar{x}$ ±s	1.7±0.9	1.8±0.8	2.4±1.1	2.4±1.0	1.4±0.8	1.6±0.9	2.2±0.8	2.3±1.0
SNK分级	A	A	A	A	A	A	A	A

1	Torabinejad M， Ung B， Kettering JD. In vitro bacterial penetration of coronally unsealed endodontically treated teeth. J Endod， 1990，16（12）：566-569.
2	Schnell FJ. Effect of immediate dowel space preparation on the apical seal of endodontically filled teeth. Oral Surg Oral Med Oral Pathol，1978，45（3）：470-474.
3	Kopper PM， Figueiredo JA， Della Bona A， et al. Comparative in vivo analysis of the sealing ability of three endodontic sealers in postprepared root canals. Int Endod J， 2003，36（12）：857-863.
4	Uranga A， Blum JY， Esber S， et al. A comparative study of four coronal obturation materials in endodontic treatment. J Endod， 1999，25（3）：178-180.
5	Morgano SM. Restoration of pulpless teeth： application of traditional principles in present and future contexts. J Prosthet Dent， 1996，75（4）：375-380.
6	Magura ME， Kafrawy AH， Brown CE Jr， et al. Human saliva coronal microleakage in obturated root canals： an in vitro study. J Endod，1991，17（7）：324-331.
7	Gish SP， Drake DR， Walton RE， et al. Coronal leakage： bacterial penetration through obturated canals following post preparation. J Am Dent Assoc， 1994， 125（10）：1369-1372.
8	Suchina JA， Ludington JR Jr. Dowel space preparation and the apical seal. J Endod， 1985，11（1）：11-17.
9	Abramovitz L， Lev R， Fuss Z， et al. The unpredictability of seal after post space preparation： a fluid transport study. J Endod， 2001，27（4）：292-295.

No related articles found!

阅读次数

全文

摘要

选择文件类型/文献管理软件名称

选择包含的内容

In vitro study of coronal leakage after post space preparation

模态框（Modal）标题

选择文件类型/文献管理软件名称

选择包含的内容

In vitro study of coronal leakage after post space preparation