摘要
目的 探讨正畸治疗中骨龄与牙移动速率的关系。方法 选择 2 3例需上、下颌双侧第一双尖牙减数矫治的女性患者 ,年龄 12～ 14岁 ,平均 13 4岁 ,治疗前均摄左手腕掌指骨片 ,利用骨成熟度指数计测法测量骨龄。用15 0g相对恒定力移动同一牙弓内的尖牙 ,比较尖牙远移速率。结果 使用相对恒定力向远中牵移尖牙 ,尖牙移动的速率存在明显的个体差异。年龄与牙移动速率之间无线性相关关系 ;而骨龄与牙移动速率间具有线性关系 ,随骨龄的上升 ,牙移动速率减慢。结论 在相同的正畸力作用下 ,牙移动速率因人而异 ,骨龄是影响牙齿移动速率的一个重要因素。
Objective To investigate the relation between the skeletal age and the rate of tooth movement. Methods Twenty-three female patients was included in this study.The age for those patients ranged from 12 to 14 years old (mean 13.4).All patients were required the removal of first premolars in both arches.Assessment of the skeletal age was made with a hand radiograph before treatment.Comparatively constant force of 150 grams was used for canine retraction.The rate of canine movement was measured. Results Using comparatively constant force to move canine distally,large individual differences were found in the rate of canine movement.There was no linear correlation between chronological age and the rate of canine retraction.But there was a linear relationship between the skeletal age and the rate of canine retraction.The canines moved distally more slowly followed skeletal age increasing. Conclusion The rate of tooth movement varied among individuals.Skeletal age seems to be a critical factor in regulating rate of tooth movement.
出处
《医用生物力学》
EI
CAS
CSCD
2004年第3期170-172,187,共4页
Journal of Medical Biomechanics
关键词
牙移动速率
骨龄
正畸力
Rate of tooth movement
Skeletal age
Orthodontic force
