桩道预备后剩余根管充填物的根尖封闭作用评价

摘要/Abstract

摘要： 目的比较不同根管充填方法及桩道预备后不同长度的充填材料对根尖的封闭作用,寻找根管充填方法和剩余充填材料的最佳搭配选择,为临床应用提供理论依据。方法132颗单根管牙随机分为6个实验组（每组各20颗）和2个对照组（每组各6颗）。根管预备后A、B、C 3组行冷牙胶侧方加压充填,桩道预备后分别剩余4、6、8 mm根管充填物;D、E、F 3组行连续波热牙胶充填,桩道预备后分别剩余4、6、8 mm根管充填物;G组 (阴性对照组）随机选择不同充填方法及不同长度剩余根管充填物;H组不进行根管充填。利用葡萄糖定量检测微渗漏模型,检测各组从冠方向根方渗漏的葡萄糖浓度（体积）。采用SPSS 19.0软件包对数据进行统计学分析。结果A和D、B和E、C和F比较,冷牙胶侧方加压充填组微渗漏显著大于热牙胶充填组。A和B、A和C、D和E、D和F相比,差异均具有显著性;B和C、E和F相比,无显著差异,说明根尖剩余4 mm和6 mm组间具有显著差异,而剩余6 mm和8 mm组间无显著差异。结论连续波热牙胶充填技术的根尖封闭性能显著优于冷牙胶侧方加压法。桩道预备后剩余6 mm微渗漏较少,是较合适的剩余充填材料长度。

关键词: 微渗漏, 冷牙胶侧方加压充填, 连续波热牙胶充填, 根尖剩余充填材料

Abstract: PURPOSE: To evaluate the sealing ability of three different lengths of root canal fillings after post space and two different obturation techniques by using a glucose leakage test, and provide theoretical basis for clinical selection of best collocation of root canal filling methods and residual root canal filling materials. METHODS: One hundred and thirty-two extracted single-root teeth were randomly divided into 6 experimental groups(n=20 each), positive(n=6)and negative controls(n=6). After root canal preparation, different treatments were performed in different groups. Group A: lateral compaction and 4 mm length of root canal fillings after post space. Group B: lateral compaction and 6 mm length of root canal fillings after post space. Group C: lateral compaction and 8 mm length of root canal fillings after post space. Group D: warm gutta vertical compaction and 4 mm length of root canal fillings after post space. Group E: warm gutta vertical compaction and 6 mm length of root canal fillings after post space. Group F: warm gutta vertical compaction and 8 mm length of root canal fillings after post space. Group G: random root canal filling. Group H: no root canal filling. A glucose leakage model was used for quantitative evaluation of the coronal to apical microleakage. SPSS 19.0 software package was used for statistical analysis. RESULTS: Lateral compaction showed significantly more leakage than warm gutta vertical compaction at all observation times, regardless of the length of the root canal fillings. The shorter the length of root canal fillings after post space, the worse the effect of the apical sealing for the same filling method. There was significant difference between 4 mm and 6 mm (P<0.05), but no significant difference between 8 mm and 6 mm (P>0.05). CONCLUSIONS: Warm vertical compaction shows a better sealing result than cold lateral compaction of gutta-percha. The shorter the length of root canal fillings after post space, the worse the effect of the apical sealing. 6 mm may be the proper residual root filling material length after post space preparation.

Key words: Microleakage, Cold lateral compaction, Warm vertical compaction, Length of root fillings after post space preparation

中图分类号:

R781.3

曲贞珍, 李晓光, 王青. 桩道预备后剩余根管充填物的根尖封闭作用评价[J]. 上海口腔医学, 2016, 25(5): 560-565.

QU Zhen-zhen, LI Xiao-guang, WANG Qing. Study of dental apex sealing effects after post space[J]. Shanghai Journal of Stomatology, 2016, 25(5): 560-565.

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