个性化正畸弓丝曲线交互调整方法研究

发布时间：2019-04-09 10:23

【摘要】：数字化医疗技术是口腔正畸领域发展的必然趋势,临床上开始使用正畸弓丝弯制机器人技术辅助弯制正畸弓丝,而正畸弓丝的数字化表达是机器人弯制的前提。由于人类牙齿排列的个性化,弓丝形状设计的复杂性,难以实现精确地个性化正畸弓丝曲线数字化表达。提出一种个性化正畸弓丝曲线交互调整的设计方法,根据托槽上的基准点坐标,定义了正畸弓丝曲线的托槽直线段和过渡曲线段,过渡曲线段由3阶Bezier曲线数学模型构建。参考手工弯制正畸弓丝的过程,基于离散和组合的方式建立了正畸弓丝特殊功能曲的参数化数学模型及数学模型库。通过对托槽直线段的位置调整、过渡曲线段的形状改变、选择插入特殊功能曲的位置和类型的方式,进行了个性化正畸弓丝曲线交互调整方法的研究。基于LABVIEW软件平台设计了交互调整的软件,并进行调整实验,其结果证明个性化正畸弓丝曲线交互调整的方法具有可行性和有效性。
[Abstract]:The digital medical technology is an inevitable trend of the development of orthodontics, and the orthodontics arch wire bending robot is used to assist in the bending of the orthodontics, and the digital expression of the orthodontic archwire is the premise of the bending of the robot. Due to the individuation of the human tooth arrangement, the complexity of the shape design of the archwire is difficult to realize, and the digital expression of the orthodontic archwire curve is difficult to realize. The invention provides a method for designing a personalized orthodontic archwire curve interaction adjustment. According to the coordinate of the reference point on the bracket, the straight section and the transition curve section of the bracket groove of the orthodontic archwire curve are defined, and the transition curve section is constructed by a three-order Bezier curve mathematical model. By referring to the process of the manual bending of the orthodontic archwire, the parameterized mathematical model and the mathematical model base of the special function of the orthodontic archwire are set up based on the discrete and combined mode. By adjusting the position of the linear segment of the bracket, the shape of the transition curve segment is changed, the position and the type of the special function curve are selected, and the research of the interactive adjustment method of the personalized orthodontic archwire curve is carried out. The software of the interaction adjustment is designed based on the LABVIEW software platform, and the adjustment experiment is carried out. The results show that the method of the interactive adjustment of the personalized orthodontic archwire is feasible and effective.
【作者单位】：哈尔滨理工大学机器人技术及工程应用研究中心;北京大学口腔医学院;齐齐哈尔大学现代教育技术中心;
【基金】：国家自然科学基金(61403222,51205093) 中国博士后科学基金(2016M591538) 黑龙江省博士后科学基金(LBH-Z16091)项目资助
【分类号】：TH787;TP242

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