[根管充填后牙根抗折性的研究]
[Research on root fracture resistance after root canal filling].
作者信息
Dou Lei, Ye Ling, Tan Hong, Chen Qiao
机构信息
Dept. of Conservative Dentistry and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China.
出版信息
Hua Xi Kou Qiang Yi Xue Za Zhi. 2013 Jun;31(3):232-4.
OBJECTIVE
To compare the fracture resistance of roots filled with three different root canal filling techniques.
METHODS
Forty extracted single-rooted permanent teeth were instrumented and randomly divided into four groups. Three experimental groups were filled with lateral compaction technique, vertical compaction technique and single-cone technique, respectively. No filling was performed in control group. All specimens were subjected to a vertical load to cause vertical root fracture. The force required to fracture was measured and the fracture lines was classified.
RESULTS
Three experimental groups exhibited higher mean fracture load values than that of control group (179.93 N+/-34.03 N). There was no significant difference among the three experimental groups, and the mean fracture load values were (210.041+/-64.57), (232.55+/-50.74), (216.80+/-78.03) N, respectively. Eighty-five percent of root fracture lines were found in the bucco-lingual direction.
CONCLUSION
Root canal filling alone can't influence the root strength significantly. There is no difference in root strength after three canal filling techniques.
目的
比较三种不同根管充填技术充填的牙根的抗折性。
方法
40颗拔除的单根恒牙进行根管预备并随机分为四组。三个试验组分别采用侧方加压技术、垂直加压技术和单锥技术进行充填。对照组不进行充填。所有标本承受垂直载荷以导致牙根垂直折断。测量折断所需的力并对折断线进行分类。
结果
三个试验组的平均折断载荷值均高于对照组（179.93 N±34.03 N）。三个试验组之间无显著差异，平均折断载荷值分别为（210.041±64.57）、（232.55±50.74）、（216.80±78.03）N。85%的牙根折断线位于颊舌方向。
结论
单纯根管充填对牙根强度影响不显著。三种根管充填技术后牙根强度无差异。
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