摘要
目的:观察犬牙槽骨牵张成骨时牙齿移动速度与移动方式的变化规律。方法:犬10只,拔除下颌两侧第二前磨牙,实验侧行牙槽骨牵张成骨术,对照侧行传统正畸。加力2周后分别于保持0、1、2、4、6周时处死2只动物,标本行大体观察、X线片检查及测量。结果:实验侧移动牙移动距离为(4.002±0.266)mm,对照侧为(1.154±0.155)mm,差异显著(P<0.001);实验侧移动牙远中倾斜(5.52±0.36)°,对照侧为(2.02±0.30)°,二者差异显著(P<0.001);实验侧支抗牙近中倾斜(1.24±0.36)°,对照侧为(0.92±0.33)°,二者无明显差异(P>0.05);实验侧支抗牙垂直高度增加(0.45±0.22)mm,对照侧为(0.31±0.17)mm,二者无明显差异(P>0.05)。结论:利用牙槽骨牵张成骨技术可以大幅度提高牙齿移动速度,同时牙齿倾斜度相应增大。
Objective i To observe the rate and style of tooth movement during dentoalveolar distraction osteogenesis in dogs. Methods： Ten dogs were used in present study. The second premolars were extracted,the dentoalveolar distraction surgical procedure was performed on the experimental side, and the traditional orthodontics was performed on the contrast side. After 2 weeks activation, two animals were sacrificed at the end of 0, 1, 2, 4, 6 weeks of fixation maintaining respectively, then examinations and measurements were performed. Results： The distracted tooth moved by the mean distance of （4. 002 ± 0. 266） mm in experimental side, while the contrast was （ 1. 154 ± 0. 155 ）mm （ P 〈 0. 001 ） ;The inclinate change of moved tooth in experimental side was （5.52 ＋0.36）° ,and the contrast was （2.02 ± 0.30）° （ p 〈 0.001 ） ; that of anchor tooth was （ 1.24 ± 0.36） o, the contrast was （0.92 ± 0.33 ） ° （ p 〉 0.05 ） ; the vertical change of anchorage tooth was （0.45 ± 0.22） mm, the contrast was （0.31 ± 0.17 ） mm （ P 〉 0.05 ）. Conclusion： The rapid tooth movement is achieved impressively through dentoalveolar distraction osteogenesis, and tooth inclinations become largely associated with tooth movement.
出处
《实用口腔医学杂志》
CAS
CSCD
北大核心
2007年第1期78-82,共5页
Journal of Practical Stomatology
关键词
牙槽突
牵张成骨
牙齿移动速度
移动方式
犬
Alveolar process
Distraction osteogenesis
Rate of tooth movement
Style of tooth movement
Dog
