新型磨牙C形纳米涂层带环性能的三维有限元分析  

Three-dimensional finite element analysis of capabilities of a new open “C”-shaped molar band with nanocoating

作　　者：周珊[1] 王翔[1] 徐旭光[2] 陆晓丽[1] 

机构地区：[1]哈尔滨医科大学附属第二医院口腔正畸科,黑龙江省哈尔滨市150086 [2]哈尔滨医科大学附属第二医院口腔外科,黑龙江省哈尔滨市150086

出　　处：《中国组织工程研究》2014年第39期6282-6286,共5页Chinese Journal of Tissue Engineering Research

基　　金：黑龙江省卫生厅基金资助(2006-123);黑龙江省教育厅资助(11531204);哈尔滨医科大学附属二院青年启动基金资助~~

摘　　要：背景:课题组研发了一种新型磨牙C形开口纳米带环(已获得中国国家发明专利,专利号为ZL201110057699.1)来克服传统带环及颊面管的不足,作为临床常用的磨牙固位装置。目的:运用三维有限元分析方法从理论上验证新型磨牙C形开口纳米带环的抗剪切及抗拉伸力是否符合临床要求。方法:运用三维有限元分析方法建立牙槽骨-牙齿-带环的有限元分析模型,给定结点拉伸、剪切载荷,通过数值模拟计算结果,预测带环应力分布情况,从而证明其固位力符合临床要求。模拟正畸临床患者的受力情况,分别在传统带环及新型带环颊面管的三维模型上施加近中方向、远中方向及垂直方向的拉力20 N,分析在不同方向力作用下黏结剂的受力情况。结果与结论:通过三维有限元进行数值模拟,可以看出在同样载荷、同样使用树脂加强型玻璃离子的情况下,C形带环黏结区域所受的应力比传统带环大,但并未达到树脂加强型玻璃离子黏结剂的临床开裂极限,因此从理论上认为C形带环能够满足临床要求。BACKGROUND：A new open“C”-shaped molar band with nanocoating （patent number：ZL201110057699.1） has been invented to overcome some weakness of traditional bands and buccal tubes, which is used for molar fixation. OBJECTIVE：Using three-dimension finite element analysis software to theoretical y prove that the new band comes up to clinic requirement. METHODS：We established a finite element model of alveolar bone-tooth-band, and node domains tensile and shear loading were given. Stress distribution of the new bands through numerical simulation was predicted and calculated. Simulation of 20 N orthodontic force was applied in medial direction, distal direction and vertical direction in the three-dimensional model of a new band buccal tube and traditional band, to analyze the stress state in different directions under the force of the binder. RESULTS AND CONCLUSION：By numerical simulation of three-dimensional finite element, the stress of the new band was higher than that of the traditional band, but it could not reach the clinical cracking limit of resin＆amp;nbsp;reinforced glass ionomer cement. So the new band could theoretical y satisfy the clinical requirements.

关 键 词：生物材料 口腔生物材料 磨牙带环 支抗 三维有限元 抗剪切力 抗拉伸力 纳米涂层 

分 类 号：R318[医药卫生—生物医学工程]