【摘要】：計算機輔助口腔正畸已然處于高速發(fā)展時期,新型無托槽隱形正畸技術在逐步邁向成熟運用階段,其整套流程包括牙頜面信息采集、牙頜面重建、牙齒分割、上下頜虛擬咬合、牙齒移動等多項環(huán)節(jié),目標是輸出牙齒矯治方案,并根據(jù)牙齒矯治方案確定分階段矯治器的數(shù)字模型,最后交予快速成型設備生產(chǎn)相應的固定矯治器或活動矯治器。其中,牙齒分割、牙齒咬合碰撞檢測、牙齒移動模擬是影響綜合矯治效果與設計時間成本的關鍵步驟。當前,無論是傳統(tǒng)有托槽正畸,或者新型無托槽隱形正畸,他們都是工業(yè)上為生產(chǎn)固定矯治器和活動矯治器而服務的,并沒有一種通用的、專為牙齒咬合分析服務的計算機輔助系統(tǒng)。因此,本文主要研究如何以牙齒分割、牙齒咬合、牙齒移動模擬這三項關鍵技術為依托,具體實現(xiàn)數(shù)字化咬合分析系統(tǒng)。本文從計算機圖形學技術與口腔正畸的結合應用出發(fā),分別對上述三項關鍵技術做出具體分析與實現(xiàn)。在牙齒分割關鍵點,本文提出了一種簡便易用的交互分割方法,相比與自動分割,具有更好的通用性,不需具體考慮牙齒的表面復雜形態(tài);在咬合碰撞關鍵點,本文利用Rapid碰撞庫,基本實現(xiàn)了虛擬咬合功能,它能找出上、下牙頜模型的具體接觸位置,為后續(xù)的牙齒移動操作提供了依據(jù);在牙齒移動關鍵點,本文分析了三維空間各模型坐標位置關系,利用OpenGL實現(xiàn)了具體的牙齒交互移動,可滿足臨床上各種牙齒移動方式,并將移動過程中產(chǎn)生的矯治數(shù)據(jù)提取保存。最后,本文在Windows XP系統(tǒng)下,依托于VS2010編譯平臺,采用了Qt界面庫,實現(xiàn)了本文提出的數(shù)字化咬合分析系統(tǒng)。相比于國外先進的技術發(fā)展,國內(nèi)起步不久的計算機輔助正畸還存在許多不足,本文的研究工作能夠為國內(nèi)的相關研發(fā)提供一定的研究基礎和實踐模擬。
[Abstract]:Computer-aided orthodontics has already been in a period of rapid development. The new technology of non-brackets invisible orthodontics is gradually becoming mature and applied. The whole process includes the collection of maxillofacial information, the reconstruction of maxillofacial, the segmentation of teeth, the virtual occlusion of upper and lower jaw. The goal of tooth movement is to output the tooth correction scheme, and the digital model of the stage appliance is determined according to the tooth correction scheme. Finally, the corresponding fixed appliance or movable appliance is produced by the rapid prototyping equipment. Among them, tooth segmentation, tooth bite collision detection and tooth movement simulation are the key steps to affect the comprehensive correction effect and design time cost. At present, whether they are traditional orthodontics with brackets or new types of invisible orthodontics without brackets, they all serve the production of fixed and movable orthodontics in industry, and there is no general purpose. Computer aided system for tooth bite analysis. Therefore, this paper mainly studies how to realize the digital bite analysis system based on the three key technologies of tooth segmentation, tooth occlusion and tooth movement simulation. Based on the application of computer graphics and orthodontics, the above three key technologies are analyzed and implemented in this paper. At the key point of tooth segmentation, this paper presents a simple and easy to use interactive segmentation method. Compared with automatic segmentation, it has better generality, and does not need to consider the complex shape of tooth surface. In this paper, the virtual bite function is realized by using Rapid collision Library, which can find out the specific contact position of upper and lower teeth and jaw model, which provides the basis for the subsequent tooth movement operation, and at the key point of tooth movement, In this paper, the coordinate position relationship of each model in 3D space is analyzed, and the interactive movement of teeth is realized by OpenGL, which can satisfy all kinds of tooth movement modes in clinic, and extract and preserve the correction data generated in the process of movement. Finally, based on the VS2010 compiler platform and QT interface library, this paper realizes the digital bite analysis system under Windows XP system. Compared with the advanced technology development in foreign countries, there are still many deficiencies in the computer aided orthodontics in China. The research work in this paper can provide a certain research foundation and practical simulation for the related research and development in China.
【學位授予單位】：電子科技大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：R783.5;TP391.7

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