發(fā)布時間：2018-03-01 18:32

  本文關鍵詞： 正畸力 形狀記憶聚合物(SMP) 有限元 弓絲　出處：《中國生物醫(yī)學工程學報》2016年02期 　論文類型：期刊論文

【摘要】：正畸治療過程中,臨床常用鎳鈦金屬弓絲對人體存在潛在的毒性作用,且缺乏美觀性;相比之下形狀記憶聚合物(SMP)材料因其良好的力學性能、易成形、美觀性,在正畸中受到越來越多的重視。而形狀記憶聚氨酯(SMPU)作為一種典型的SMP材料,其在正畸治療效果方面的研究尚不充分,所能提供的矯治力大小有待進一步探究。在正畸矯治力研究中,臨床口內檢測非常困難,有限元分析技術是目前最主要的研究手段。針對上述問題,基于Tobushi一維SMP本構方程,參照粘彈性材料標準線性模型構建了SMP材料的三維本構方程,并利用FORTRAN語言編寫了可用ABAQUS調用的UMAT子程序;參照正畸臨床數(shù)據,利用三維建模軟件建立了包括牙齒、托槽、弓絲在內的三維有限元模型,以側切牙、尖牙為研究對象,通過對弓絲施加不同形式的變形,得出SMPU弓絲形變量為3 mm時產生的初始正畸力大小為0.06~0.55 N。結果表明,SMPU弓絲提供的初始正畸力與臨床認為的最佳正畸力相比略為偏小,適合正畸治療的第一階段;但SMPU材料的力學性能還有進一步提升改善的空間,在正畸領域具有較高的潛在應用價值。
[Abstract]:During orthodontic treatment, the Ni-Ti metal arch wire has potential toxicity to human body, and it lacks beauty, compared with shape memory polymer (SMPP) material because of its good mechanical properties, easy to form and beautiful. More and more attention has been paid to orthodontics. As a typical SMP material, shape memory polyurethane (SMPU) has not been studied enough in orthodontic treatment. In the study of orthodontic force, clinical intraoral detection is very difficult, and finite element analysis is the most important research method. In view of the above problems, based on the Tobushi one-dimensional SMP constitutive equation, According to the standard linear model of viscoelastic material, the three-dimensional constitutive equation of SMP material is constructed, and the UMAT subprogram which can be called by ABAQUS is written by FORTRAN language, and the teeth and brackets are built by referring to the clinical data of orthodontics. Three dimensional finite element model including arch wire is used to study the lateral incisor and canine teeth, and different forms of deformation are applied to the arch wire. The results showed that the initial orthodontic force provided by SMPU arch wire was slightly smaller than that of the optimal orthodontic force, which was suitable for the first stage of orthodontic treatment. However, the mechanical properties of SMPU materials still have room for further improvement, and have high potential application value in orthodontic field.
【作者單位】： 浙江工業(yè)大學特種裝備制造與先進加工技術教育部重點實驗室;浙江工業(yè)大學材料科學與工程學院;
【基金】：國家自然科學基金(51375453) 浙江省自然科學基金(LY13E050017)
【分類號】：R783.5

【相似文獻】

相關期刊論文 前10條

1 李洪，劉磊，李潤，吳麗萍，，梁儻;正畸力值與牙齒移動方式的生物力學[J];吉林工業(yè)大學學報;1995年03期

2 錢英莉,樊瑜波,蔣文濤;正畸力作用下牙齒移動的生物力學[J];醫(yī)用生物力學;2003年03期

3 王琪;房偉;;在正畸力的作用下微小螺釘種植體真能保持不動嗎[J];國外醫(yī)學.口腔醫(yī)學分冊;2006年02期

4 劉鑫;向學熔;范小平;;正畸力對牙髓的影響[J];國際口腔醫(yī)學雜志;2008年02期

5 段銀鐘 ,陳華 ,張巧余 ,藺崇甲;關于正畸力值與牙齒移動速度的實驗研究[J];第四軍醫(yī)大學學報;1990年01期

6 張月蘭;時毅;劉林]

本文編號：1553071