无托槽隐形矫治器整体内收上颌前牙的三维有限元分析

发布时间：2018-03-10 10:05

本文选题：无托槽隐形矫治器　切入点：生物力学　出处：《实用口腔医学杂志》2017年05期 　论文类型：期刊论文

【摘要】：目的:研究无托槽隐形矫治器整体内收上颌前牙过程中上颌前牙所受的应力情况及初始移动规律。方法:采用CBCT扫描已拔除双侧上颌第一前磨牙患者,建立上牙列、牙周膜及牙槽骨的初始复合体模型。激光扫描患者牙冠外形并与初始模型三维重叠建立终模型。应用ANSYS Workbench软件分析安装无托槽隐形矫治器时上颌前牙的应力分布及初始位移趋势。结果:建立了具有高仿真度的上颌复合体三维有限元模型;上颌双侧中切牙及侧切牙初始位移趋势一致,表现为远中舌向倾斜移动,且均有伸长趋势,其牙周膜应力分布与其位移趋势相一致;上颌双侧尖牙表现为远中倾斜移动趋势。结论:无托槽隐形矫治器在整体内收上颌前牙时,上颌前牙均表现为倾斜移动,且有伸长趋势。
[Abstract]:Objective: to study the stress and initial movement of the maxillary anterior teeth during the whole retraction of the maxillary anterior teeth with an invisible appliance without brackets. Methods: the maxillary first premolars were removed by CBCT scan and the upper dentition was established. The initial composite model of periodontal ligament and alveolar bone. The final model was established by laser scanning the shape of the crowns and overlapping with the initial model. The stress distribution of the maxillary anterior teeth was analyzed by ANSYS Workbench software. Results: a three-dimensional finite element model of maxillary complex with high fidelity was established. The initial displacement trend of bilateral central incisor and lateral incisor of maxillary was the same, which showed that the distal tongue was inclined and elongated, and the stress distribution of periodontal membrane was consistent with the displacement trend of maxillary bilateral central incisor and lateral incisor. Conclusion: the maxillary anterior teeth are inclined to move and tend to be elongated when the maxillary anterior teeth are retracted from the whole maxillary anterior teeth with the invisible orthodontic appliance without brackets.
【作者单位】：中山大学附属口腔医院正畸科;广东省口腔医学重点实验室;
【基金】：国家自然科学基金(编号:81100240) 广东省自然科学基金(编号:2015A030313068) 2015光华本科生科研设计大赛(编号:2015B005) 2015大学生创新训练项目(国家级)(编号:201501101)
【分类号】：R783.5

【相似文献】