颊侧微种植体支抗推磨牙向远中的三维有限元分析

发布时间：2018-02-25 08:41

本文关键词： 微种植体支抗三维有限元法推磨牙向远中　出处：《郑州大学》2014年硕士论文　论文类型：学位论文

【摘要】：种植体支抗推磨牙向远中主要适用于面型轻度前突，上颌牙列轻度拥挤，单侧或双侧第一磨牙关系安氏Ⅱ类的患者，，近年来在临床的应用逐渐增多，已成为矫正磨牙的远中关系，改善患者的前突面型的主要方法之一。目的：建立口腔微种植体支抗推上颌磨牙向远中的三维有限元模型，对种植钉支抗增加前牙支抗的不同连接位置及不同连接形式情况下推上颌磨牙向远中时各牙齿的应力分布及移动趋势进行生物力学分析，以期为临床上种植体支抗推磨牙向远中提供生物力学参考。方法：使用CBCT，Mimics，Geomagics studio，PRO/E等一系列三维有限元分析软件建立了包括上牙列、上颌骨、牙周膜、托槽、弓丝和种植体支抗在内的完整的颊侧微种植体支抗推磨牙向远中三维有限元模型,并使用该模型对微种植体支抗增加前牙支抗的不同连接位置及不同连接形式情况下推上颌磨牙向远中时各牙齿的应力分布及移动趋势进行生物力学分析。结果：1对微种植体支抗不同连接位置加强前牙支抗推磨牙向远中的三维有限元模型分析可知，牵引钩与种植钉连接加强前牙支抗远移上颌磨牙，磨牙的远中移动位移较大，前牙唇向倾斜小，牙齿的移动更接近于整体移动。利用微种植体支抗推单侧磨牙向远中时，应加强另一侧的支抗，以防止中线偏斜。 2对微种植体支抗不同连接形式加强前牙支抗推磨牙向远中的三维有限元模型分析可知，牵引钩与种植钉弹性连接加强前牙支抗远移上颌磨牙，远中移动磨牙位移较大，牙冠向远中倾斜，近中颊尖下垂较多。中切牙及侧切牙有直立内收和压入的趋势，尖牙的颊倾较明显。临床应用时根据所要达到的效果选择合适的加强支抗方式，以获得最优的效果。
[Abstract]:The implant Anchorage is mainly suitable for the patients with mild protrusion of the face, slight crowding of maxillary dentition and the relation between unilateral and bilateral first molars. In recent years, the clinical application of implant Anchorage is increasing gradually. It has become one of the main methods to correct the distal relationship of molars and to improve the protrusion of patients. Objective: to establish a three-dimensional finite element model of oral microimplant Anchorage against pushing maxillary molars. The biomechanical analysis of the stress distribution and movement trend of the maxillary molars pushing the maxillary molars in the distal direction was carried out under the condition that the implant nail Anchorage increased the Anchorage of the anterior teeth. In order to provide biomechanical reference for clinical application of implant Anchorage to push molar. Methods: a complete three-dimensional finite element model of buccal microimplant Anchorage to push molars was established using CBCTCT-Mimicics Geomagstuics Studio Prop. E, including upper dentition, maxilla, periodontal ligament, bracket, arch wire and implant Anchorage. The model was used to analyze the stress distribution and movement trend of each tooth when the maxillary molar was pushed to the far distance under the different connection position and different connection form of the micro-implant Anchorage to increase the Anchorage of the anterior teeth. Results the three dimensional finite element model analysis of the three dimensional finite element model showed that the traction hook and the implant nail were connected to the anterior teeth to strengthen the Anchorage of the maxillary molars, and the distal displacement of the molars was larger. The movement of the teeth is closer to the whole movement. When the unilateral molar is pushed to the far side by using the micro-implant Anchorage, the Anchorage of the other side should be strengthened in order to prevent the midline deviation. 2Three-dimensional finite element model analysis of the different connection forms of the micro-implant Anchorage to the propulsive molar showed that the elastic connection between the traction hook and the implant nail strengthened the anterior denture to resist the distal movement of the maxillary molars, and the displacement of the distal moving molars was larger. The crown inclined to the distal center, and the proximal buccal tip was more prolapse. The central incisor and lateral incisor had the tendency of vertical adduction and indentation, and the buccal inclination of the canine was more obvious. To get the best effect.
【学位授予单位】：郑州大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：R783.5

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