[关于应用于拔牙病例的复合弓丝的三维有限元研究]
[A three-dimensional finite element study on composite archwire applied in extraction cases].
作者信息
Sun Xin-hua, Lin Xing-nan, Zhu Xian-chun, Zhou Zhen-ping
机构信息
Department of Orthodontics, School of Stomatology, Jilin University, Changchun 130041, China.
出版信息
Zhonghua Kou Qiang Yi Xue Za Zhi. 2007 Mar;42(3):176-9.
OBJECTIVE
To explore mechanical properties of the composite archwire (CoAW) applied in extraction cases.
METHODS
The mandibular three dimensional model was established by spiral computed tomography scanning and SOLIDWORKS 2001 PLUS software. The archwire model was established by means of ANSYS software. The mechanical analysis and calculation of CoAW were carried out.
RESULTS
With the diameter of NiTi part of CoAW gradually augmented (the diameter of stainless steel part kept unchanged), the stress on teeth gradually increased. As the diameter of stainless steel part of CoAW gradually augmented (the diameter of NiTi part kept unchanged), the stress on teeth also gradually increased. The CoAW (0.30 mm NiTi round wire combined with 0.36 mm stainless steel round wire) produced the least force on teeth. There was little contradistinction between six kinds of CoAW and stainless steel wire on the stress of posterior teeth.
CONCLUSIONS
The stress on teeth closely correlated with the diameter of the composite archwire.
目的
探讨应用于拔牙病例的复合弓丝（CoAW）的力学性能。
方法
通过螺旋计算机断层扫描和SOLIDWORKS 2001 PLUS软件建立下颌三维模型。利用ANSYS软件建立弓丝模型。对CoAW进行力学分析和计算。
结果
随着CoAW中镍钛部分直径逐渐增大（不锈钢部分直径不变），牙齿上的应力逐渐增加。随着CoAW中不锈钢部分直径逐渐增大（镍钛部分直径不变），牙齿上的应力也逐渐增加。CoAW（0.30 mm镍钛圆丝与0.36 mm不锈钢圆丝组合）对牙齿产生的力最小。六种CoAW与不锈钢丝在后牙应力方面差异不大。
结论
牙齿上的应力与复合弓丝的直径密切相关。
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