本文選題：隱形矯治器 + 尖牙��； 參考：《浙江大學(xué)》2016年碩士論文

【摘要】：背景隨著口腔正畸學(xué)科的蓬勃發(fā)展,正畸矯治器也發(fā)生了翻天覆地的變化,從1926年出現(xiàn)的方絲弓矯治器,到后來的直絲弓矯治器,隨著人們生活水平的提高,以及材料學(xué)、計(jì)算機(jī)科學(xué)輔助技術(shù)的日新月異,一種看不見的托槽——無托槽隱形矯治器在正畸學(xué)科的應(yīng)用也日益普遍,無托槽隱形矯治器發(fā)展近二十年,在臨床上的應(yīng)用越來越普遍,由于無托槽隱形矯治器受到熱壓膜材料限制,它在正畸過程中對(duì)控根移動(dòng)牙齒,整體移動(dòng)牙齒方面與固定矯治器相比,沒有優(yōu)勢(shì)。而對(duì)于隱形矯治器對(duì)于牙齒正畸的作用機(jī)制以及應(yīng)力加載模式,各種學(xué)術(shù)研究層出不窮,而有限元分析作為一種理論分析,在正畸學(xué)科的應(yīng)用早已有之,本研究為分析尖牙遠(yuǎn)中移動(dòng)構(gòu)建模型,進(jìn)一步做有限元分析。臨床上通過增加附件,能較為有效地控制牙齒移動(dòng)。有限元分析作為理論分析,通過構(gòu)建牙槽骨-牙周膜-尖牙-隱形矯治器三維有限元分析模型,并順利獲得收斂的結(jié)果分析后,進(jìn)行進(jìn)一步的增加附件后的尖牙運(yùn)動(dòng)模型的理論分析,為臨床上探索附件的生物力學(xué)作用以及附件的應(yīng)用和設(shè)計(jì)探索可能性。方法1、在體外將牙齒模型通過3 Shape掃描儀獲得牙齒的stl格式掃描數(shù)據(jù)。2、將牙齒模型數(shù)據(jù)導(dǎo)入CAD優(yōu)化軟件Rhino中進(jìn)行布爾運(yùn)算分割,獲得牙周膜模型、牙槽骨模型、無托槽隱形矯治器模型,進(jìn)行布爾裝配,獲得牙槽骨-牙周膜-尖牙-隱形矯治器模型。3、在尖牙牙冠臨床冠中心添加—3*2*1mm的垂直矩形附件后,融合獲得粘有附件的牙冠,該牙冠通過在表面法線方向擴(kuò)大0.75mm獲得隱形矯治器。布爾裝配后,獲得牙槽骨-牙周膜-尖牙-隱形矯治器模型。4、將模型以sat數(shù)據(jù)導(dǎo)入Abaqus軟件中進(jìn)行非線性接觸分析。5、獲得的網(wǎng)格模型取遠(yuǎn)中面的數(shù)個(gè)特征點(diǎn)進(jìn)行位移分析,用origin科學(xué)制圖軟件進(jìn)行分析位移。結(jié)果1、隱形矯治器通過施加強(qiáng)迫位移于尖牙,所構(gòu)建模型單元數(shù)71699,總節(jié)點(diǎn)數(shù)為105502,應(yīng)力集中于矯治器齦方,以及牙根中上2/3,隱形矯治器具有脫開的趨勢(shì),牙齒傾斜移動(dòng)。2、增加垂直矩形附件后的尖牙,所構(gòu)建模型單元數(shù)71699,總節(jié)點(diǎn)數(shù)為105502,隱形矯治器不再具有脫開的趨勢(shì),在隱形矯治器齦方有應(yīng)力集中,牙根位移較為均勻分布,尖牙趨于整體移動(dòng)。結(jié)論1、所構(gòu)建的牙槽骨-牙周膜-尖牙-隱形矯治器模型仿真度較高,能較好的模擬隱形矯治器對(duì)尖牙受力分析。2隱形矯治器需要通過增加附件進(jìn)行固位,同時(shí)通過附件改變牙齒的受力狀態(tài),來控制牙齒運(yùn)動(dòng)。3、通過體外增加附件并行有限元分析的方式來進(jìn)行隱形矯治器的生物力學(xué)研究方法可行,增加垂直矩形附件能夠使隱形矯治器的固位作用增強(qiáng),并且能較為有效實(shí)現(xiàn)牙齒的整體移動(dòng)。
[Abstract]:Background with the vigorous development of orthodontic discipline, the orthodontic appliance has also undergone tremendous changes. From the square wire appliance, which appeared in 1926, to the later straight wire appliance, with the improvement of people's living standard, as well as the material science and the computer science auxiliary technology, a kind of invisible brackets. The application of the orthodontic appliance in orthodontics is also becoming more and more common. The development of the non - braced stealth appliance is more and more popular in the past twenty years. As the non - braced stealth appliance is restricted by the hot pressing film material, it has no advantage in the orthodontic process of controlling the root moving teeth and moving the teeth as a whole with the fixed appliance. As for the mechanism of orthodontic effect and the stress loading mode of the orthodontic orthodontic appliance, various academic studies have come out in an endless stream. As a theoretical analysis, finite element analysis has been used in orthodontic discipline for a long time. This study is to analyze the model of the distal movement of the canine and make a further finite element analysis. It is more effective to control tooth movement. As a theoretical analysis, the finite element analysis is used to analyze the three-dimensional finite element analysis model of the alveolar bone - periodontal - canine stealth appliance and the results of the convergence. The theoretical analysis of the attachment of the tooth movement model is further added to explore the biomechanics of the appendage. The effect and the possibility of the application and design of the attachment. Method 1, in vitro, the tooth model was obtained through the 3 Shape scanner to obtain the STL format scanning data.2, and the tooth model data was introduced into the CAD optimization software Rhino for the Boolean operation segmentation, and the periodontal membrane model, the tooth bone model, the non troughless stealth appliance model, and the cloth were carried out. The alveolar bone - the periodontal ligament and the canine stealth appliance model.3 was obtained. After adding the vertical rectangular appendage to the Crown Center of the canine crown, the dental crown was fused with the attached attachment. The crown was obtained by expanding 0.75mm in the surface normal direction. The alveolar bone - periodontal membrane - canine - stealth was obtained after the assembly of the crown. The appliance model.4, the model takes sat data into Abaqus software to carry on the nonlinear contact analysis.5, the obtained grid model takes several characteristic points of the far middle surface to carry on the displacement analysis, and uses the origin scientific drawing software to analyze the displacement. Results 1, the stealth appliance is constructed by forcing the forced displacement to the canine, the number of the model units is 71699, the general section is constructed. The point number is 105502, the stress concentrates on the orthodontic gingival square, and the upper 2/3 in the root of the tooth. The stealth appliance has the tendency to disconnect. The tooth inclines to move.2 and increases the canine of the vertical rectangular appendage. The number of the model units is 71699, the total node number is 105502. The stealth appliance no longer has the tendency to disconnect, and there is a stress concentration in the gingival square of the stealth appliance. The tooth root displacement is more evenly distributed and the canine tends to move to the whole. Conclusion 1, the model of the alveolar bone, periodontal ligament and canine stealth appliance model has high simulation degree, and it can simulate the force analysis of the canine with better simulation of the stealth appliance. The.2 stealth appliance needs to be repositioned by adding attachments, and the force state of the teeth is changed by attachments. It is feasible to carry out the biomechanical research method of the stealth appliance by adding attachment and finite element analysis in vitro, and increasing the vertical rectangular appendage can enhance the retention of the stealth appliance, and can effectively realize the movement of the teeth in.3.
【學(xué)位授予單位】：浙江大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類號(hào)】：R783.5

【參考文獻(xiàn)】

相關(guān)期刊論文 前7條

1 石磊;朱松;宋艾陽;宮海環(huán);金杰;馮丹;;新型涂層對(duì)基托樹脂長期水浸泡后力學(xué)性能的影響[J];實(shí)用口腔醫(yī)學(xué)雜志;2015年03期

2 甄敏;胡文杰;榮起國;;上頜中切牙冠根折行冠延長術(shù)并樁核冠修復(fù)的三維有限元分析[J];北京大學(xué)學(xué)報(bào)(醫(yī)學(xué)版);2015年06期

3 張玉新;黃首富;楊光;;軟件ABAQUS和ANSYS在鋼筋混凝土中的非線性分析[J];紅水河;2012年04期

4 顧澤旭;田杰;李變tb;高鋒;;無托槽隱形矯治技術(shù)中附件的應(yīng)用[J];實(shí)用口腔醫(yī)學(xué)雜志;2010年01期

5 王凡;白玉興;祁鵬;周潔珉;厲松;岐紅恩;;無托槽隱形矯治尖牙整體移動(dòng)的生物力學(xué)研究[J];醫(yī)用生物力學(xué);2007年02期

6 劉建平,王忠義,甘云娜;CT掃描建立下頜后牙固定義齒三維有限元模型后的應(yīng)力分析[J];中國臨床康復(fù);2004年05期

7 陳孟詩,李良,鄧力,黃華,賴勝祥;可對(duì)細(xì)胞施加雙向應(yīng)變的體外培養(yǎng)系統(tǒng)[J];生物醫(yī)學(xué)工程學(xué)雜志;2003年03期

，

本文編號(hào)：2088268