Root resorption after experimental tooth movement using superelastic forces in the rat
Root resorption after experimental tooth movement using superelastic forces in the rat
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DOI：
10.1093/ejo/cjq016
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发表时间：
2010-12-01
影响因子：
2.6
通讯作者：
Nakamura, Yoshiki
中科院分区：
文献类型：
--
作者：
Noda, Koji;Arai, Chihiro;Nakamura, Yoshiki
4g和8 g力组表现为破坏性骨吸收，伴有组织变性和明显的牙根吸收，1.6g力组仅表现为牙根吸收，0.8g力组与对照组相似。比值比较显示，0.8 g组与对照组相似，无显著差异。在第28天，1.6 g组的比值大于0.8 g组和对照组，而在第14、21和28天，4和8 g组的比值大于对照组（P < 0.01）;结果表明，当力的大小超过一定值时，牙根发生明显的吸收1.6 g的力作用下，牙根吸收量随力的增加而增加，力的大小从0.8 g增加到4 g，牙根吸收量随力的增加而增加。
The experimental groups with 4 and 8 g force showed undermining bone resorption with degenerating tissue and marked root resorption, the 1.6 g group showed only root resorption, while the 0.8 g group was similar to the control. Comparison of the ratios showed that the 0.8 g group was similar to the control with no significant difference. The ratio on day 28 in the 1.6 g group was larger than that in the 0.8 g and control groups, while on days 14, 21, and 28, the ratios in the 4 and 8 g groups were larger than those in the control (P < 0.01); these two experimental groups showed the same significant differences.It is suggested that significant root resorption occurs when the force magnitude exceeds 1.6 g in the rat upper first molar during tipping tooth movement by continuous force, and the amount of root resorption increases with serial force magnitudes from 0.8 to 4 g.