%0 Journal Article
%T 无托槽隐形矫治器各参数对尖牙压低移动治疗的影响
%A 蔡永清
%A 杨晓翔
%A 何炳蔚
%J 医用生物力学
%D 2017
%X 目的 研究隐形矫器不同参数（厚度、矫治位移量及弹性模量）在下颌尖牙压低移动治疗中对尖牙位移和牙周膜应力的影响。方法 通过有限单元方法模拟下颌尖牙在48个不同隐形矫治器模型作用下的压低治疗。结果 尖牙的初始位移和牙周膜应力均与隐形矫治器厚度、压低位移和弹性模量成正比关系，隐形矫治器包含的压低位移量是对牙齿压低移动治疗影响最大的因素。在尖牙的压低移动治疗中，牙周膜压应力是最敏感最易受参数变化影响的参数。结论 增大矫治器的厚度、压低位移和弹性模量可以提高尖牙的压低位移，但是同时牙周膜应力也增大，并且牙周膜压应力增大的幅度最大。要加速无托槽隐形矫治治疗正畸牙移动，只能辅助以诸如黏贴附件、托槽弓丝矫治治疗和辅助外加种植支抗等其他附加的设备或者措施。</br>Objective To study the effects of different parameters (thickness, orthodontic displacement, elastic modulus) of Invisalign on canine displacement and periodontal ligament (PDL) stress during mandibular canine intrusion treatment. Methods Forty-eight different Invisalign models were used to simulate canine intrusion treatment by using the finite element method. Results The initial displacement of the canine and stress on canine PDL were proportional to thickness, intrusion displacement, and elastic modulus of Invisalign. The intrusion displacement had the greatest influence on canine displacement. During canine intrusion treatment, the compressive stress on PDL was the most sensitive parameter and changed easily with the change of parameters. Conclusions The increase of Invisalign thickness, intrusion displacement and elastic modulus can increase canine displacement, however, the stress on PDL also increases, with the largest increasing magnitude in compressive stress on PDL. Therefore, to accelerate tooth movement in Invisalign treatment, it is suggested to use the assisted devices or measurements, such as attachment, supplement of bracket-wires treatment, or implant anchorage.
%K 无托槽隐形矫治器
%K 尖牙移动
%K 压低位移
%K 弹性模量
%K 压应力&lt
%K /br&gt
%K Invisalign
%K Canine
%K movement
%K Intrusion
%K displacement
%K Elastic
%K modulus
%K Compressive
%K stress
%U http://www.mechanobiology.cn/yyswlx/ch/reader/view_abstract.aspx?file_no=201701010&flag=1