本文關(guān)鍵詞： 微種植體支抗 三維有限元法 推磨牙向遠中　出處：《鄭州大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：種植體支抗推磨牙向遠中主要適用于面型輕度前突，上頜牙列輕度擁擠，單側(cè)或雙側(cè)第一磨牙關(guān)系安氏Ⅱ類的患者，，近年來在臨床的應(yīng)用逐漸增多，已成為矯正磨牙的遠中關(guān)系，改善患者的前突面型的主要方法之一。 目的：建立口腔微種植體支抗推上頜磨牙向遠中的三維有限元模型，對種植釘支抗增加前牙支抗的不同連接位置及不同連接形式情況下推上頜磨牙向遠中時各牙齒的應(yīng)力分布及移動趨勢進行生物力學(xué)分析，以期為臨床上種植體支抗推磨牙向遠中提供生物力學(xué)參考。 方法：使用CBCT，Mimics，Geomagics studio，PRO/E等一系列三維有限元分析軟件建立了包括上牙列、上頜骨、牙周膜、托槽、弓絲和種植體支抗在內(nèi)的完整的頰側(cè)微種植體支抗推磨牙向遠中三維有限元模型,并使用該模型對微種植體支抗增加前牙支抗的不同連接位置及不同連接形式情況下推上頜磨牙向遠中時各牙齒的應(yīng)力分布及移動趨勢進行生物力學(xué)分析。 結(jié)果：1對微種植體支抗不同連接位置加強前牙支抗推磨牙向遠中的三維有限元模型分析可知，牽引鉤與種植釘連接加強前牙支抗遠移上頜磨牙，磨牙的遠中移動位移較大，前牙唇向傾斜小，牙齒的移動更接近于整體移動。利用微種植體支抗推單側(cè)磨牙向遠中時，應(yīng)加強另一側(cè)的支抗，以防止中線偏斜。 2對微種植體支抗不同連接形式加強前牙支抗推磨牙向遠中的三維有限元模型分析可知，牽引鉤與種植釘彈性連接加強前牙支抗遠移上頜磨牙，遠中移動磨牙位移較大，牙冠向遠中傾斜，近中頰尖下垂較多。中切牙及側(cè)切牙有直立內(nèi)收和壓入的趨勢，尖牙的頰傾較明顯。臨床應(yīng)用時根據(jù)所要達到的效果選擇合適的加強支抗方式，以獲得最優(yōu)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.
【學(xué)位授予單位】：鄭州大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：R783.5

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本文編號：1533722