【作者】 吴峻岭；

【导师】 巢永烈；

【作者基本信息】 四川大学 ， 口腔临床医学， 2005， 博士

【摘要】 随着口腔修复学的发展,将烤瓷技术与整铸活动义齿相结合这种新型的工艺日益被人们所重视。为此我们自行开发研制了国产新型牙用烤瓷支架钴铬合金,前期的研究结果表明:合金生物性能、机械性能良好,可以用于临床制作;而如何进一步提高自研合金的金瓷结合力,以达到更完美的修复学效果,成为了本论文研究的重点。因此,本文探讨了五种不同的表面处理技术对合金表面进行处理,研究其对烤瓷支架钴铬合金金瓷结合强度的影响;同时还借助了扫描电镜以及能谱分析仪对金瓷结合界面进行了深入的分析,结果表明: (1) 本合金在上瓷之前,需要预氧化,氧化温度为980℃,时间为5分钟。 (2) 利用溶胶-凝胶技术,起到了改善金瓷结合的作用。 (3) 将纳米材料(纳米二氧化硅、纳米金介质)上瓷之前涂附于金属基底表面,起到了提高金瓷结合强度的作用。 (4) 两种真空镀膜方法,即磁控反应溅射镀膜技术提高了金瓷结合强度而电子束真空蒸发镀膜技术却降低了金瓷结合强度。 (5) 利用等离子喷涂技术来改善金瓷结合,起到了明显的效果。更多还原

【Abstract】 With the development of prosthonditics, a new technique which combines PFM technique and casting framework of RPD appears and has being applied by more and more dentists. So we developed a new type of Co-Cr dental alloy which has good metal-porcelain matching and could be cast for RPD framework. The fomer research showed that it had good biological compatibility and mechnical capability for clinical use. But how to improve the bonding strength of the porcelain bonded to alloy becomes the key point of our research in order to get better restorative effect. Thus we used five different surface treatment technologies to the aolly, and discussed their effects on metal-porcelain bonding strength. In the same time the interface between metal and porcelain was observed and analyzed by SEM and EPMA. The conclusions were drawed as followings:（1）Before applied for porcelain, the aolly should be oxidated for 5 minutes at the temperature of 980℃.（2）Using the Sol-Gel technique could improve the bonding of the porcelain to our alloy.（3）Before applied for porcelain, the metal substrate surface was smearedwith nano-scale material （nano-SiO₂、 nano-gold particles）, and the nano-scale material had a positive effect to increase the bonding strength.（4）Two methods of vacuum coating film were used in our study in order to increase the bonding strength , one was magnetron reactive sputter deposition, and the other was electron beam vapour deposition. The former had a positive effect while the latter had a negative effect.（5）The plasma spraying technology had a significative function in enhancing the bonding strength.更多还原