3 D ANALYSIS OF ORTHODONTIC BIOMECHANICAL FORCE SYSTEMS

对生物力学系统的透彻理解 正畸弓丝的激活对于提高生产效率是很重要的。 牙齿移动是为了达到预定的治疗目标。 这些信息对于准确地解释 正畸器械的生物学反应。临床趋势是 电器动作范围更大的电线使用量的增加 采用新材料建造，支架间跨度更长。这 使正畸矫治器在更长时间内保持活动状态 两次预约之间的时间间隔，但也放大了 错误构思的设备激活。因此，重要的是要 更准确地了解正畸钢丝产生的力和力矩 激活。 以前的研究已经检查了牙齿移动和力系统 从二维的角度制作它。最正畸 然而，家用电器可以在太空的各个层面发挥作用。这项研究旨在 更好地定义由产生的三维力和力矩 三维正畸用具。一个三维有限元 提出了用单元模型来分析由FUBLISH公司开发的力系统。 有轮廓的正畸弓丝。这项研究将描述差异 在力的二维和三维分析和 三维矩形正畸弓丝产生的力矩 镶嵌在磨牙和门牙上。考虑以下问题的重要性 不同成分正畸弓丝的不同性能 主要作用于弯曲和扭转将通过改变 正在测试的导线的横截面尺寸，并将 在磨牙和门牙之间产生的有效的力系统。这个 通过与理想牙弓的比较，研究牙弓形状的影响。 用更正方形或更锥形的形状来形成配置。

Thorough understanding of the biomechanical force systems generated by orthodontic archwire activations is important for producing efficient tooth movement directed toward achieving predetermined treatment goals. This information is also essential for accurate interpretation of the biological responses to orthodontic appliances. Clinical trends are toward an increased use of wires with a greater range of action by appliances constructed of new materials and with longer interbracket spans. This enables an orthodontic appliance to remain active for longer periods of time between appointments but also magnifies the unwanted side-effects of inaccurately conceived appliance activations. It is therefore important to know more precisely the forces and moments produced by orthodontic wire activations. Previous studies have examined tooth movement and the force systems producing it from a two-dimensional perspective. Most orthodontic appliances, however, act in all planes of space. This study is aimed at better defining the three-dimensional forces and moments produced by three-dimensional orthodontic appliances. A three-dimensional finite element model is proposed to analyze the force systems developed by fully- contoured orthodontic archwires. The study will describe differences between a two-dimensional and three-dimensional analysis of the forces and moments produced by a three-dimensional, rectangular orthodontic archwire inserted at the molars and incisors. The importance of considering the different properties of various compositions of orthodontic archwires acting primarily in bending versus torsion will be examined by varying the cross-sectional dimensions of the wires being tested and comparing the effective force systems produced at the molars versus the incisors. The effect of dental arch shape will also be studied by comparing ideal arch form configurations with those that are more square or more tapered.