正畸力大小对牙周健康成人牙齿移动速度的影响

目的:探讨不同正畸力对牙周健康成人牙齿移动速度的影响。方法:选择矫治设计需要拔除双侧上颌第1双尖牙,上颌设计种植钉强支抗的正畸治疗病例32人,随机分为4组,每组8人。每例病人随机选择1侧分别施加50 g、100 g、150 g、200 g尖牙远中移动力作为实验侧,另1侧尖牙不施加正畸力随机挑选8个患者作为对照侧。测量4周后尖牙远中移动的距离进行统计分析。结果:在受不同正畸力4周后,尖牙移动距离50 g时(0.57±0.28)mm,100 g时(1.13±0.77)mm,150 g时(1.03±0.45)mm,200 g时(0.84±0.34)mm,差异有统计学意义(P<0.05)。结论:牙齿移动速度不随力值的增大而增加,100 g力值较适宜尖牙移动。

The influence of orthodontic force on the movement speed of teeth

Objective: To study the effect of the various orthodontic forces on the movement speed of adult tooth.Methods:32 patients were selected who needed treatment by extracting the upper first premolar on both sides of maxilla,and implants as anchorage.One side canines were choosed randomly as experimental group by bearing on 50 g,100 g,150 g,200 g force respectively between canine and impant,another side as contral group.The movement distances of teeth were measured and analyzed statisticlly after 4 weeks.Results:The movement distances were(0.57±0.28) mm,(1.13±0.77) mm,(1.03±0.45) mm,(0.84±0.34) mm respectively and were statistically significant after 4 weeks.Conclusion: The movement speed were not increased as the force was large.100 g force was appropriate.