复合矫治弓丝配合减数矫治拥挤错位前牙的力学分析  

Mechanical analysis of composite archwire applied to anterior malocclusion with extraction of bilateral first premolars

作　　者：林兴南[1] 孙新华[1] 朱宪春[1] 

机构地区：[1]吉林大学口腔医学院正畸科,吉林长春130021

出　　处：《上海口腔医学》2006年第6期637-640,共4页Shanghai Journal of Stomatology

基　　金：吉林省科技厅资助课题(20030539-3)

摘　　要：目的探讨复合矫治弓丝(compositearchwire,CoAW)应用于拔牙病例时的结构优化问题。方法螺旋CT扫描下颌骨模型,获得断层影像30张,利用SOLIDWORKS进行下颌骨三维重建,并在ANSYS中建立与之匹配的弓丝模型,最后进行力学分析和计算。结果当CoAW作用于模型中腭向错位的前牙时,其产生的矫治力介于TiNi形状记忆合金(TiNishapememoryalloy,TiNiSMA)和不锈钢丝(stainlesssteel,SS)之间,即FSS>FCoAw>FNiTi;随着CoAW中NiTi段弓丝直径的逐渐增加(SS段弓丝直径保持不变),错位牙所受的矫治力逐渐增加;随着CoAW中SS段弓丝直径的逐渐加大(NiTi段弓丝直径保持不变),错位牙所受的矫治力也逐渐增大。结论增大CoAW中TiNi段的直径,CoAW的刚度增加;增大CoAW中SS段的直径,CoAW的刚度也增加。PURPOSE： To optimize the structure of composite archwire applied to anterior malocclusion with extraction of bilateral first premolars. METHORDS： The mandibular model was scanned by spiral CT and 30 CT images were obtained, then the mandible finite element model and the archwire model was respectively established by means of SOLIDWORKS software and ANSYS software, mechanics analysis and calculation were carried out. RESULTS： The force produced by composite archwire applied to anteriorly malocclused teeth in the model was greater than by TiNi shape memory alloy but smaller than stainless steel： FSS〉FCoAW〉FNiTi; As the diameter of NiTi in the composite archwire increased （the diameter of stainless steel kept unchanged）, the force on the malocclused teeth gradually increased;As the diameter of stainless steel in the composite archwire increased （the diameter of NiTi kept unchanged）,the force on the malocclused teeth increased accordingly. CONCLUSION： The rigidity of the composite archwire increases as the the diameter of NiTi increases; the rigidity of composite archwire also increases as the the diameter of the stainless steel increases.Supported by Research Fund of Jilin Provincial Bureau of Science and Technology（Grant No.20030539-3）.

关 键 词：正畸弓丝 复合弓丝 力学分析 

分 类 号：R783[医药卫生—口腔医学]