牙周膜和牙槽骨牵张快速牙移动的比格犬配对实验  

Rapid teeth movement through periodontal ligament distraction and dentoalveolar distraction in beagle dogs: a paired controlled trial

作　　者：罗启贤 刘长庚[1] 欧阳舢 程自力[1] 莫晖[1] 

机构地区：[1]广州医科大学附属广佛医院口腔科,广东佛山528251

出　　处：《广州医科大学学报》2014年第6期14-20,共7页Academic Journal of Guangzhou Medical University

摘　　要：目的:比较牙周膜牵张(PDLD)和牙槽骨牵张(DAD)在加快正畸牙移动方面的治疗效果。方法:比格犬6只,下颌两侧随机分组进行自身配对实验,一侧建立PDLD模型,另一侧建立DAD模型,双侧同时牵张2周。在术前、加力1、2周时测量移动牙及支抗牙的位置,行X线检查。结果:PDLD移动牙2周内移动(3.90±0.56)mm,在第1、2周分别移动(1.74±0.30)mm、(2.16±0.27)mm。DAD移动牙2周内移动(4.23±0.59)mm,在第1、2周分别移动(2.14±0.22)mm、(2.09±0.38)mm。PDLD支抗牙移动距离为(0.66±0.09)mm;DAD支抗牙移动距离为(0.45±0.08)mm。PDLD移动牙第1、2周的移动距离差异有统计学意义(P<0.01);DAD移动牙第1、2周的移动距离差异没有统计学意义(P>0.05)。PDLD和DAD移动牙在第一、二周及总移动距离差异有统计学意义(P<0.01)。PDLD和DAD支抗牙移动距离差异有统计学意义(P<0.01)。X线示PDLD组牙齿以倾斜移动为主;DAD组牙齿以整体移动为主,未发现牙根吸收。病理示PDLD和DAD牙周膜及牙髓组织未发生可逆性改变,牵张处牙槽骨有新骨生成。结论:PDLD和DAD两种方法均能实现牙齿快速远中移动。Objective：To compare the efficacy of periodontal ligament distraction （ PDLD ） versus Dentoalveolar distraction （ DAD） for rapid orthodontic teeth movement. Methods：6 beagles were included in the study. Then, both sides of the mandibles were randomized for self-paired trial, one for PDLD model, and the other for DAD model. And the distraction of both sides lasted for 2 weeks. The locations of moved teeth and teeth with anchorage were measured for X-ray examination at baseline and at week 1 and 2 after the distraction. Results：The movement of moved teeth in the PDLD group was（1.74±0.30）mm in the first week,（2.16±0.27） mm in the second week, and （3.90±0.56）mm in total. The movement of teeth with anchorage in the DAD group was （2.14±0.22）mm in the first week, （2.09±0.38）mm in the second week, and （4.23±0.59）mm in total. The movement of teeth with anchorage in the PDLD group and DAD group at week 1 and 2 were （0.66±0.09）mm and （0.45±0.08）mm, respectively. There was statistically significant difference in moving distance of PDLD moved teeth between week 1 and week 2 （ P〈0.01） . The differences in week 1, 2 and total moving distance of moved teeth between PDLD and DAD groups reached the level of statistical significance （ P〈0. 01 ） . There was statistically significant difference in moving distance of teeth with anchorage between PDLD and DAD groups （ P〈0.01） . X-ray showed that the teeth tended to tilt movement in PDLD group and bodily movement in DAD group without root absorption. Pathological study confirmed that there was no irreversible change in PDLD and DAD. And osteogenesis was found in DAD. Conclusion：Rapid distal teeth movement can be performed by PDLD and DAD methods.

关 键 词：牙周膜牵张 牙槽骨牵张 尖牙 牙移动 牵张成骨 

分 类 号：R783.5[医药卫生—口腔医学]