SLM钴铬合金的金瓷结合强度研究

发布时间：2018-01-18 02:09

本文关键词：SLM钴铬合金的金瓷结合强度研究　出处：《浙江工业大学》2016年硕士论文　论文类型：学位论文

【摘要】：PFM(Porcelain-fused-to-metal)金属烤瓷修复体既具有金属的强度,同时又有瓷的美观色泽等优点,在缺牙修复及牙齿美容等领域已被广泛应用,受到了广大医生和患者的好评。目前传统方法多采用失蜡铸造技术来制作金属烤瓷修复体,但该方法面临着许多问题,如制造流程长、缺陷较多。近年来,激光选区融化(Selective-Laser-melting,SLM)技术逐渐被应用于牙科领域,由于其分层制造的原理,可有效提高金属烤瓷修复体的制造效率。本文围绕利用SLM技术制作金属烤瓷修复体的适合性,通过喷砂、预氧化等技术手段研究SLM技术对钴铬合金金瓷结合强度的影响,以及比较SLM技术与铸造技术在金瓷结合强度上的差异。本文的主要工作和研究成果如下:(1)利用SLM技术制作钴铬基底冠,判断其与石膏模型的适合性;另外打印出标准试件,通过拉伸试验检测其机械性能,结果证明通过SLM技术制作钴铬基底冠的精度以及机械性能可以满足临床要求。(2)按YY0621-2008标准制作SLM钴铬合金试件,利用不同粒度的Al2O3对试件进行喷砂处理来得到不同粗糙度的表面,然后对试件进行预氧化、烤瓷处理,最后检测金瓷结合强度。实验得出,100目与120目两组金瓷结合强度相近,均高于未喷砂组与80目组,证明喷砂处理有利于提高SLM钴铬合金金瓷结合强度,粗糙度过大不利于SLM钴铬合金金瓷结合强度。(3)通过对SLM钴铬合金试件进行不同时间的预氧化处理,利用扫描电镜观察其表面形貌以及金瓷结合区的元素迁移变化,之后用三点弯曲试验检测金瓷结合强度。实验得出,预氧化时间为60s的处理有利于SLM钴铬合金金瓷结合强度。(4)通过对铸造组钴铬试件进行常规的打磨、喷砂、预氧化以及烤瓷处理,之后检测金瓷结合强度,结果显示,SLM技术与铸造技术所获得钴铬合金的金瓷结合强度相近,高于YY0621-2008标准25MPa,值得临床推广应用。
[Abstract]:PFM Porcelain-fused-to-metal-ceramic prosthesis has not only the strength of metal, but also the beauty and color of porcelain. It has been widely used in the field of tooth defects and tooth beauty, and has been praised by doctors and patients. At present, traditional methods of wax loss casting technology to make metal porcelain restoration. But the method faces many problems, such as long manufacturing process and many defects. In recent years, laser selection melting has been selected as Laser-melting. SLM) technology has been gradually applied in the field of dentistry because of its principle of layered manufacturing. It can effectively improve the manufacturing efficiency of metal porcelain restoration. This paper focuses on the suitability of making metal porcelain restoration by SLM technology through sand blasting. The effect of SLM technology on the bonding strength of cobalt-chromium alloy metal-porcelain was studied by pre-oxidation. The main work and research results of this paper are as follows: (1) making cobalt-chromium substrate crown with SLM technology. Judge its suitability to gypsum model; In addition, the standard specimen was printed out and its mechanical properties were tested by tensile test. The results show that the precision and mechanical properties of the cobalt-chromium base crown made by SLM can meet the clinical requirements. (2) the SLM cobalt-chromium alloy specimen can be made according to the YY0621-2008 standard. Different granularity Al2O3 was used to blast the specimen to get different roughness surface, and then the sample was pre-oxidized, porcelain was processed, and the bonding strength of metal-porcelain was tested. The bonding strength between 100 mesh and 120 mesh groups was similar, which was higher than that of non-sand blasting group and 80 mesh group, which proved that sand blasting treatment was beneficial to improve the bonding strength of SLM cobalt-chromium alloy metal-porcelain. Too much roughness is not conducive to the SLM cobalt-chromium alloy metal-ceramic bonding strength. 3) through the SLM cobalt-chromium alloy specimen for different time pre-oxidation treatment. Scanning electron microscope was used to observe the surface morphology and the element migration change in the metal-porcelain binding zone. The bonding strength of the metal-porcelain was measured by three-point bending test. The treatment of pre-oxidation time of 60 s is beneficial to the bonding strength of SLM cobalt-chromium alloy. 4) conventional grinding, sand blasting, preoxidation and porcelain porcelain treatment are carried out on the cast cobalt-chromium specimens. The results show that the metal-ceramic bonding strength of Co / Cr alloy obtained by YY0621-2008 is similar to that obtained by casting technology, and is higher than that of YY0621-2008 standard 25 MPA. It is worth popularizing and applying in clinic.
【学位授予单位】：浙江工业大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：R783.1;TG174.45

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