自锁托槽结合不同的支抗方式关闭拔牙间隙的实验研究(1)
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[摘要] 目的 Typodont模型上，模拟临床关闭拔牙间隙的过程，研究自锁托槽结合3种不同的支抗方式对矫治效果的影响。 方法 制作36个安氏I类双颌牙齿前突的标准Typodont模型，随机配对分成3组，每组12个模型。A组单纯使用自锁托槽；B组使用自锁托槽结合微种植体支抗；C组使用自锁托槽结合口外弓支抗。 结果 B组的间隙关闭速度为(1.37±0.03)mm/h，A组比B组的间隙关闭速度稍快，但差异无统计学意义，A组和B组显著高于C组(P < 0.05)；B组的上颌中切牙平均舌侧移动距离为(6.27±0.44)mm，显著大于其他两组 (P < 0.01)；B组的上颌第一磨牙平均近中移动距离为(0.11±0.08)mm，显著小于其他两组(P < 0.01)。 结论 应用自锁托槽结合微种植体支抗关闭拔牙间隙，既能保持自锁托槽的轻力矫治，又能充分发挥微种植体绝对支抗的作用，矫治后上前牙内收更多，支抗丧生更少。
[关键词] 关闭间隙；自锁托槽；微种植体；Typodont模型
[中图分类号] R783.5 [文献标识码] A [文章编号] 1673-7210(2012)04(a)-0067-03
Experiment of studys on the combination of self-locking brackets and different anchorage to close extraction space
QIU Weifang1 DENG Wenzheng1 CAI Yonglin2 MAO Junwu3 MENG Yu4 TAN Hanti4 HUANG Ruxiang1
1.Department of Stomatology, Wuzhou Red Cross Hospital, Guangxi Zhuang Autonomous Region, Wuzhou 543002, China;2.Department of Central Lab, Wuzhou Red Cross Hospital, Guangxi Zhuang Autonomous Region, Wuzhou 543002, China;3.Department of dental, Guangxi Guilin Medical College, Guangxi Zhuang Autonomous Region, Guilin 541001, China;
4.Department of Stomatology, Guangxi Guigang People's Hospital, Guangxi Zhuang Autonomous Region, Guigang 537100, China
[Abstract] Objective To investigate the treatment effect influences on using the self-locking bracket combined with three different anchorage method to close the gap after tooth extracted on the Typodont model. Methods 36 Angle Class I standard Typodont models of bimaxillary teeth protrusion were made and randomly divided to three groups (n = 12). In A group, the space was closed by only self-locking bracket. In B group, the space was closed by self-locking bracket combined with micro-implant anchorage. In C group, the space was closed by self-locking bows bracket combined with extra-oral bow anchorage. Results The space-closing speed in B group was (1.37±0.03) mm/h, it was higher than in A group, but the difference was not significant ......
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