Surface Modification and Fabrication of Dental Implant by Micro Current Electrical Discharge Machining
| Autor: | Guo-Xin Huang, 黃國信 |
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| Rok vydání: | 2010 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 98 The principle of micro current-EDM (MCEDM) is similar to traditional EDM. It can be utilized to machine the conductive materials with micro current for product the high precision part. MCEDM is an effective method to fabricate fine devices with complex shapes. In this study, used pure titanium as electrode and dental implant, MCEDM fluid is added the titanium powder in deionized water, to improve the surface modification and fabrication the dental implant. By different MCEDM parameters such as, peak current, pulse duration and the added amount of titanium powder were performed to explore the surface characteristics of pure titanium. Then discuss the biocompatibility with water contact angle measurement and recast layer of phase identification. The experimental results show that surface cracks reduce when the more of titanium powder concentration, and the recast layer thickness increase when the peak current and pulse duration increased. According to GI-XRD phase identification, we can found that the recast layer is titanium dioxide structure. After confirmed by TEM, the result is the same as the XRD identification. And found the oxide layer by MCEDM is composed of TiO, TiO2 and titanium hydroxide by surface analysis of the recast layer, and it contributes to the surface hydrophilic. The samples have good wettability performance, measured by water contact angle. Apply the beat experiment parameters fabricate the dental implant successfully. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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