[Mechanical analysis of composite archwire applied to anterior malocclusion with extraction of bilateral first premolars].
作者信息
Lin Xing-nan, Sun Xin-hua, Zhu Xian-chun
机构信息
Department of Orthodontics, Stomatological Hospital, Jilin University, Changchun 130041, Jilin Province, China.
出版信息
Shanghai Kou Qiang Yi Xue. 2006 Dec;15(6):637-40.
PURPOSE
To optimize the structure of composite archwire applied to anterior malocclusion with extraction of bilateral first premolars.
METHODS
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: F(SS)>F(CoAw)>F(NiTi); 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).
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