自锁托槽结合种植支抗对关闭拔牙间隙速度影响的实验研究  

Influences of Speed on the Combination of Self-locking Brackets and Micro-implant Anchorage to Close Space

作　　者：邓文正[1] 彭小丽 邱伟芳[1] 毛峻武[3] 谭汉提[4] 

机构地区：[1]广西梧州市红十字会医院口腔科广西梧州543002 [2]广西桂东人民医院口腔科 [3]广西桂林医学院口腔系 [4]广西贵港市人民医院口腔科

出　　处：《口腔医学研究》2012年第12期1296-1297,1300,共3页Journal of Oral Science Research

摘　　要：目的:在Typodont模型上,模拟临床应用自锁托槽结合微种植体支抗关闭拔牙间隙的过程,研究新方案对关闭间隙速度的影响。方法:制作24个安氏I类双颌牙齿前突的标准Typodont模型,随机分成实验组和对照组各12个。实验组使用自锁托槽结合微种植体支抗牵引关闭拔牙间隙,牵引力为75g;对照组则使用直丝弓托槽结合口外弓支抗关闭拔牙间隙,牵引力为150g。结果:实验组的平均间隙关闭速度为(1.37±0.03)mm/h,显著高于对照组的(0.87±0.03)mm/h(P<0.001)。实验组的上颌中切牙平均舌侧移动距离为(6.27±0.44)mm,显著大于对照组的(4.34±0.38)mm(P<0.001)。实验组的上颌第一磨牙平均近中移动距离为(0.11±0.08)mm,显著小于对照组的(2.34±0.24)mm(P<0.001)。结论:应用自锁托槽结合微种植体支抗关闭拔牙间隙速度显著快于传统的直丝弓托槽结合口外弓支抗,支抗丧失更少。Objective：To investigate the influences of speed on using the self-locking bracket combined with micro-implant anchorage to accelerate the gap closed after tooth extracted on the Typodont model.Methods：Twenty-four Angle Class I standard Typodont models of bimaxillary teeth protrusion were made and randomly divided into two groups（n=12）.In experimental group,the space was closed by self-locking bracket combined with micro-implant anchorage with 75g traction.In control group,the space was closed by straight-silk bows bracket combined with extra-oral bow anchorage with 150g traction.Results：The space-closing speed was significantly higher in experimental group than in control group（1.37±0.03）mm/h vs（0.87±0.03）mm/h（P0.001）.The Lingual moving distance of maxillary central incisor was significantly greater in experimental group than in control group（6.27±0.44）mm vs（4.34±0.38）mm（P0.001） and the mesial moving distance of maxillary first molars was significantly less in experimental group than in control group（0.11±0.08） mm vs（2.34±0.24）mm（P0.001）.Conclusion：Self-locking bracket combined with micro-implant anchorage results in faster space-closing speed and less anchorage loss than straight-silk bows bracket combined with extra-oral bow anchorage.

关 键 词：关闭间隙 自锁托槽 种植支抗 Typodont模型 

分 类 号：R783.5[医药卫生—口腔医学]