新型正畸牙齿快速移动装置的动物实验研究

The study of orthodontic rapid tooth movement using dentoalveolar distraction osteogenesis

目的:对一种新研制的正畸牙齿快速移动装置进行临床应用前研究,以验证该装置的临床应用可行性。方法:杂种犬6只,拔除下颌第二前磨牙后,随机选取一侧为实验侧,进行外科减阻游离手术后,粘结自制牵引装置。另一侧为对照侧以传统方法牵引下颌第一前磨牙向远中。结果:实验侧移动牙平均向远中移动3.78mm,与对照侧比较具有显著差异(P<0.01)。实验侧支抗牙平均向近中移动0.42mm,与对照侧比较没有显著差异(P>0.01)。实验侧移动牙与下颌尖牙间离断处牙槽骨有大量新生成骨细胞。结论:新型牵引装置可以应用于正畸临床的牙齿快速移动。

Objective：To study the changes of periodental and pulp in orthodontic rapid tooth movement through dentoalveolar distraction osteogenesis. Method：The experiment was carried out in 6 dogs, with the left side of jaws of each one set as experiment or control side, and the other side as control or experiment side. On the control side, the first premolar was moved by using traditional methods while the third premorlar as anchor, on the experiment side by using self-made distraction device. Result：The distracted tooth moved by the mean distance of 3.78 mm during 14 days, and the anchor tooth moved by 0.42 mm on average （P〈0.01）. And there were continuous bone formation between the moving tooth and the canine. Conclusion：Dentoalveolar distraction osteogenesis was also a useful method of rapid tooth moving.