臺灣博碩士論文加值系統

在各式各樣的材料中有自然生成與人工合成材料，從結構分析可分為等向性材料與非等向性材料。牙齒既是天然非等向性材料的例子。本研究針對牙齒組織在浸泡酸蝕溶液作用後，其機械性質與微結構之改變加以探討。本文分三部分，首先對不同種類人類牙齒作不同方向切面後，利用奈米壓痕量測不同切面的機械性質。再使用不同磷酸濃度溶液酸蝕牙齒表面後再次使用奈米壓痕量測及利用掃描式電子顯微鏡SEM與光學顯微鏡OM等儀器觀察牙齒表面形貌酸蝕前後改變。
本研究並建立等向性材料微米壓痕量測模型，輔以有限元素數值模擬，探討等向性模數對整體機械性質的影響。
由於奈米壓痕操作簡單即可量測多項材料係數，因此大量應用在生醫材料機械性質的量測，在了解微結構與個別模數的關係後，透過多尺度力學的模擬，建立微結構與整體機械性質的關係，將提供機械性質量測外，另一個詮釋的觀點。

In a wide variety of materials, there are naturally and artificially synthetic materials.It could be divided into isotropic and anisotropic materials in the structural analysis. Tooth is an example of natural anisotropic material.The study is aimed to explore the mechanical properties and the variation of microstructure when the teeth has been soaked in the etching solution.This essay is divided into three parts. First, after cutting from different directions for different types of human teeth, the mechanical properties of different sections will be measured by nanoindentation.After using different phosphoric acid concentration solution to etch the surface of tooth, the variation of the surface of tooth could be observed when the measurement of nanometer indentation, SEM and OM have been used.The anisotropic materials nanoindentation model is also established with finite element of numerical simulation and the influence of anisotropic modulus to mechanical properties will be discussed in this research.

Nanoindentation which is easy to operate and it could measure a number of material coefficients easily it has been applied to measure a large number of mechanical properties of the measurement of biomedical materials.Another point of view which can provide beyond the measurement of mechanical quality will be interpreted by knowing the relation between microstructures and individual modules, through the modeling of multi - scale mechanics, and establish the relation of microstructure and the overall mechanical properties.

誌謝 i
摘要 ii
Abstract iii
目次 iv
圖目錄 vi
表目錄 ix
第一章 序論 1
1.1前言 1
1.2文獻回顧 3
第二章、研究理論與數值模擬 6
2.1奈米壓痕試驗 6
2.2 等向材料之奈米壓痕理論模式 8
2.3有限元素分析 10
2.3.1有限元素數值分析 10
2.3.2Abaqus三維有限元素模型 14
第三章、牙齒壓痕試驗 19
3.1 牙齒分類處理 19
3.2 牙齒酸蝕 23
3.3實驗器材 23
第四章、結果與討論 28
4.1等向性材料模擬 28
4.2牙齒機械性質量測與模組分析 29
4.2.2牙齒微組織觀察 41
4.3牙齒壓痕曲線擬合 43
4.4牙齒酸蝕實驗 47
4.4.1牙齒酸蝕後機械性質量測 47
4.4.2牙齒酸蝕後光學顯微鏡觀察 53
4.5牙齒壓痕實驗探討 58
第五章、結論 60
參考文獻 61

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