新研制单翼低摩擦力托槽解除牙列拥挤的Typodont分析  

Analysis of the effect of relieving dental crowding by using a newly designed low frictional force single-wing bracket on typodont model

作　　者：周建国[1] 冯剑颖[2] 

机构地区：[1]浙江省海盐县人民医院口腔科．浙江海盐314300 [2]杭州市口腔医院正畸中心,浙江杭州310006

出　　处：《上海口腔医学》2011年第6期608-610,共3页Shanghai Journal of Stomatology

摘　　要：目的:通过Typodont模拟架实验,模拟正畸治疗的临床过程,研究单翼低摩擦力托槽系统在解除牙列拥挤时的效果。方法:先建立2个错畸形完全一致的上颌Typodont模拟架,分别在2个上颌Typodont的牙模型的临床冠中心,用光固化树脂粘结3M公司的MBT标准直丝弓托槽和新研制的单翼低摩擦力托槽,使用0.014英寸超弹Ni-Ti丝排齐上颌牙。分别行2个上颌Typodont牙模型的托槽与弓丝单独结扎,弓丝完全入槽。结扎紧度由同一人操作控制。2个模型同时置于同一恒温水浴箱内,45℃保持4min,取出模型,重新测量2个上颌Typodont的牙模型的牙列拥挤度,计算出牙列拥挤度的减小值。重复上述实验10次,采用SPSS12.0软件包对实验数据进行t检验,比较2种托槽对解除牙列拥挤的效果。结果:用MBT标准直丝弓托槽(3M)组,牙列拥挤度平均减小2.58mm,新研制单翼低摩擦力托槽组平均减小5.49mm(P<0.05)。结论:新研制的单翼低摩擦力托槽系统在Typodont模拟架上解除牙列拥挤的效果优于MBT标准直丝弓托槽系统。PURPOSE：To compare the effect of relieving dental crowding by using a newly designed low frictional force single-wing bracket and conventional MBT brackets on typodont model.METHODS： Two replicated typodont models were made with a same crowded upper arch.The two different types of bracket were bound separately on two typodont models.Clinical course was simulated with warm bath.The typodont models＇ crowded upper arch was aligned with 0.014 NiTi.The data were analyzed for t test using SPSS12.0 software package.RESULTS： In the MBT bracket group,the degree of the dental crowding reduced 2.58mm,compared with 5.49mm in the newly designed group.Significant difference between self-ligating brackets and conventional design was found between the two groups（P0.05）.CONCLUSIONS： It is indicated that the newly designed low frictional force single-wing-bracket relieves dental crowding faster than the conventional MBT bracket on typodont model.

关 键 词：单翼 低摩擦力 托槽 模拟架 拥挤度 

分 类 号：R783.5[医药卫生—口腔医学]