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　　目的：比較不同設(shè)計的種植體和/或天然牙支持的覆蓋義齒的固位力，疲勞強(qiáng)度，應(yīng)力分布及牙槽骨形變量。材料與方法：本研究設(shè)計12個模型，按支持形式不同分為A，B，C，D，E和F六組，其中每組有2個模型，分別使用O-ring和Dalbo弧形附著體系統(tǒng)；可形變丙烯酸附著體系統(tǒng)。A組和C組含有3個支持體：2個微型種植體（MDI）和1個模擬牙根，旋入Dalbo Rotex （DR）或微型種植體；E組僅有3個微型種植體支持。B組和D組含有4個支持體：2個MDI和2個模擬牙根；F組僅有4個MDI支持。A，B，C和D組用來評估覆蓋義齒的固位力，分別記錄經(jīng)過0，360，720，1440和2880次取戴循環(huán)后的固位力（N）大小，每個樣本重復(fù)測量5次。根據(jù)舌側(cè)集中牙合理論，應(yīng)用35N垂直負(fù)載和17.5N水平負(fù)載模擬在靜態(tài)狀態(tài)下的牙合力來評估其應(yīng)力分布和牙槽骨形變量情況。應(yīng)用ANSYS軟件包（13.0）分析每個模型在附著水平和骨支持界面的最大von Mises應(yīng)力和形變量。結(jié)果：應(yīng)用雙因素方差分析和多重比較Tukey’s檢驗等統(tǒng)計學(xué)方法比較絕對固位力（AF）和相對固位力（RF），從而分析不同分組及循環(huán)周期是否存在... 

【文章頁數(shù)】：172 頁

【學(xué)位級別】：博士

【文章目錄】：
ABBREVIATIONS
ABSTRACT
中文摘要
Introduction
Part I: Investigation into Retention Strength and Fatigue Resistance of Various Designs of overdenture support foundation and attachments
    1. Materials
        1.1 Software and Equipment
    2. Methods
        2.1 Experimental models
        2.2 Model preparation
        2.3 Testing apparatus
        2.4 Universal testing Machine
        2.5 Mounting Procedure of testing apparatus and model on the universal testing machine
        2.6 Testing Protocol
        2.7 Statistical analysis
    3. Results
        3.1 Descriptive statistics for the Absolute Force
        3.2 Descriptive statistics for the Relative Force
        3.3 Inferential statistics
    4. Discussions
        4.1 Research study questions
        4.2 Attachment system selection
        4.3 Effect of cycles’ no. on the retention fatigue strength values
        4.4 Effect of attachment combination designs on the retention fatigue strength values
        4.5 Effect of overdenture support configuration design on the retention fatigue strength values
        4.6 Bases for selecting the no. of cycles
        4.7 Reasons behind the mini dental implant system selection
        4.8 Limitation of the retention Fatigue strength study
Part II: Investigation into Stress Distribution and Flexing Among Various Designs of overdenture support foundation and attachments
    1. Materials
        1.1 Software and Equipment used in the finite element analysis study
    2. Methods
        2.1 Study models design
        2.2 Assumption of the detailed geometries and dimensions
        2.3 Materials properties
        2.4 Generating the model
        2.5 Boundary condition and load application
        2.6 Solving the problems
        2.7 Listing the results
    3. Results
        3.1 Data collection
        3.2 Comparing vMwithin each models
        3.3 Comparing maximum flexing within each models
        3.4 Comparing vMat attachments’ levels among all models
        3.5 Comparing vMat bone-overdenture support foundations’ levels among all models
        3.6 Comparing maximum flexing at attachments and support foundation levels among all models
    4. Discussions
        4.1 Research study questions
        4.2 Importance of finite element method
        4.3 Model design considerations
        4.4 Free standing implant vs. tooth-Implant supported overdenture models and Triangular vs. Quadrangular overdenture support designs
        4.5 Stresses and flexing comparison at attachment and bone-overdenture support foundation levels
        4.6 Limitation of finite element method
Conclusions
Literature Review
    I. Overdenture; support designs and attachments
    II. Principles of Oral Structure Biomechanics
    III. Methods of Measuring Stress Distribution
    IV. Finding from Previous Retention and Wear Studies
References
AUTHOR INFORMATIONS
ACKNOWLEDGEMENTS


【參考文獻(xiàn)】：
期刊論文
[1]下頜骨三維有限元模型的邊界約束設(shè)計[J]. 周學(xué)軍,趙志河,趙美英,樊瑜波.  華西口腔醫(yī)學(xué)雜志. 1999(01)



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