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| 复合纳米金膜技术增强牙科钛-瓷结合的基础研究 |
| Clinic basic study on improving dental titanium-ceramic bonding with Au Nanoparticle coating technique |
| 投稿时间：2014-04-25 修订日期：2014-04-30 |
| DOI： |
| 中文关键词: 钛 纳米金膜 瓷 弯曲强度 |
| 英文关键词:Titanium Porcelain Composite nano-gold films Bending strength |
| 基金项目:江苏省六大高峰人才基金 |
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| 摘要点击次数: 1445 |
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| 中文摘要: |
| 目的 利用离子多层自组装技术在纯钛表面沉积复合纳米金膜并烧结专用钛瓷粉,探讨该技术对钛-瓷之间结合强度的影响。 方法 根据ISO 9693要求制备预成纯钛试件20个,根据是否沉积复合纳米金膜进行分组(沉积纳米金膜：AuS；非沉积纳米金膜：S),每组10个钛-瓷标准试件。场发射扫描电镜观察钛试件沉积纳米金膜后的表面形态,并进一步观察钛-瓷结合界面的微观形貌。三点弯曲法测定钛-瓷结合强度,并进行统计学分析。体视显微镜观察确定钛-瓷试件的断裂模式。电子探针检测结合界面上Au元素的分布情况。 结果 AuS组的钛瓷结合强度(36.24±3.64MPa)明显高于S组的钛瓷结合强度(30.78±3.83 MPa,p<0.05)。场发射扫描电镜观察显示钛表面沉积纳米金颗粒后形成了均匀、致密的复合纳米金膜。电镜观察结合界面显示,AuS组钛-瓷结合界面连续而紧密,体视显微镜观察断裂模式以混合断裂为主；而对照组钛-瓷结合界面可见明显的裂隙,偶有气泡,断裂模式以界面断裂为主。电子探针检测结果显示结合界面上可见Au元素分布,纳米金颗粒在烧结过程中团聚成簇后沿钛-瓷结合界面呈带形分布、点状弥散在粘结瓷底部。结论 在本实验研究条件下,纯钛表面沉积复合纳米金膜可显著提高Super porcelain Ti-22专用钛瓷粉与预成纯钛试件之间的结合强度。 |
| 英文摘要: |
| Objective To investigate the effect of composite nano-gold films deposited on the pure titanium by ionic self-assembled mutilayers(ISAM) technique on the adhesion of porcelain to titanium. Methods Twenty pure titanium specimens were prepared by machining procedure in rectangular shape according to ISO 9693 to make two groups of each set(n=10). All specimens were sandblasted with 150 μm Al2O3 particles at the pressure of 0.2 MPa. Then one group of the specimens were deposited composite nano-gold films, and the other serve as a control group. A layer of porcelain was built up onto the titanium strips of both groups with a conventional technique. Field emission scanning electron microscope(FE-SEM) was used to observe the surface morphology of titanium specimen after depositing composite nano-gold films, and further observe the microstructure of the interface between titanium and porcelain after sintered. Optical Stereomicroscope was used to characterize the titanium-porcelains adhesion and determine the mode of failure after three-point bending test was performed. The distribution of the Au element on the interface of titanium-porcelain was detected by electron microprobe (EMP). Results The adhesion of nano-gold film deposited group was significantly higher than those of the undeposited group［(36.24±3.64MPa) and (30.78±3.83 MPa), p＜0.05 ］. FE-SEM illustrated that the surface of the nano-gold deposited group formed a uniform, dense composite nano-gold film. Stereomicroscope and SEM images showed that composite nano-gold films enhanced the bond strength between porcelain and titanium. Small, white spots of gold particles could be detected along the titanium-porcelain bonding interface by electron microprobe (EMP). Conclusions The bending strength between porcelain and titanium was significantly improved when titanium was deposited with composite nano-gold films. |
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