中国组织工程研究

中国组织工程研究 ›› 2019, Vol. 23 ›› Issue (6): 838-842.doi: 10.3969/j.issn.2095-4344.1569

• 组织工程口腔材料 tissue-engineered oral materials • 上一篇    下一篇

反复熔铸金铂烤瓷合金耐腐蚀性能的变化

陈 熙1，2，施巧蕊1，2，郑 明1，2，程 辉1，2   

  1. 1福建医科大学附属口腔医院，福建省福州市 350002；2福建医科大学口腔生物力学及美学研究中心，福建省福州市 350002
  • 收稿日期:2018-10-25 出版日期:2019-02-28 发布日期:2019-02-28
  • 通讯作者: 程辉，教授，福建医科大学附属口腔医院修复科，福建省福州市 350002
  • 作者简介:陈熙，男，1980年生，福建省福清市人，汉族，2007年福建医科大学毕业，硕士，主治医师，主要从事美学修复研究。
  • 基金资助:

    福建省科技攻关重点资助项目(2007Y0061)，项目负责人：程辉；福建省科技计划重点资助项目(2010Y0024)，项目负责人：程辉；福建省社会发展重大科技资助项目(2011Y4001)，项目负责人：程辉；福建医科大学附属口腔医院优先发展学科建设资助项目([2008]39号)，项目负责人：程辉

Corrosion resistance of gold-platinum ceramic alloys after repeated casting

Chen Xi1, 2, Shi Qiaorui1, 2, Zheng Ming1, 2, Cheng Hui1, 2   

  1. 1School and Hospital of Stomatology, Fujian Medical University, Fuzhou 350002, Fujian Province, China; 2Oral Biomechanics and Aesthetics Research Center, Fujian Medical University, Fuzhou 350002, Fujian Province, China
  • Received:2018-10-25 Online:2019-02-28 Published:2019-02-28
  • Contact: Cheng Hui, Professor, School and Hospital of Stomatology, Fujian Medical University, Fuzhou 350002, Fujian Province, China; Oral Biomechanics and Aesthetics Research Center, Fujian Medical University, Fuzhou 350002, Fujian Province, China
  • About author:Chen Xi, Master, Attending physician, School and Hospital of Stomatology, Fujian Medical University, Fuzhou 350002, Fujian Province, China; Oral Biomechanics and Aesthetics Research Center, Fujian Medical University, Fuzhou 350002, Fujian Province, China
  • Supported by:

    the Fujian Provincial Science and Technology Key Project, No. 2007Y0061 (to CH); Fujian Provincial Science and Technology Funding Project, No. 2010Y0024 (CH); Major Science and Technology Funding Project for Social Development in Fujian Province, No. 2011Y4001 (to CH); the Funding Project for the Construction of Preferentially Developed Discipline in the School and Hospital of Stomatology of Fujian Medical University, No. [2008]39 (to CH)

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摘要：

文章快速阅读：

 

文题释义：
表面粗糙度：体现金属表面微观的几何形状误差，在发生一定晶间腐蚀的情况下，在一定程度上反映合金的抗腐蚀能力。表面粗糙度对口腔内微生物的黏附与定殖有显著影响，表面粗糙度对菌斑聚集黏附影响的临界值为0.2 µm，即当材料粗糙度Ra大于此值时，合金表面粗糙度增加，细菌黏附明显增加，当材料粗糙度Ra< 0.2 µm 时，随着Ra值的减小，细菌黏附数量减少不明显。
表面自由能：指物质表面所具有的内能，不论液体还是固体，从无表面生成一个表面，必然依靠环境对其做功，该功即转变为表面自由能。表面自由能本质上源自于分子间的相互作用，分子间作用力可分为色散力和极性力，因此表面自由能包括色散分量γD和极性分量γP，即γD+γP=γS。
 
 
背景：课题组前期研究发现，金铂烤瓷合金经过反复熔铸后化学成分、力学性能等均未发生改变。
目的：进一步研究反复熔铸对金铂烤瓷合金耐腐蚀性能的影响。
方法：取金铂烤瓷合金(原代合金)，进行第1次熔铸，熔铸环境为真空加氩气，以此获得Ⅰ代合金(底座、铸道等废旧合金)，将Ⅰ代合金进行重铸前处理，以此获得Ⅱ代合金(底座、铸道等废旧合金)，依此类推，获得Ⅲ代合金(底座、铸道等废旧合金)。将3代合金浸泡于pH=2.35的电解液中，7 d后，检测浸泡液中各金属离子的种类及水平，计算浸泡后合金的失重腐蚀速率，观察浸泡后合金的表面形貌变化，测量表面粗糙度和表面自由能变化。

结果与结论：①各代金铂合金浸泡后都仅检测到铟、锡、铁3种元素，其中铟元素析出量较多，但各代合金间各类金属离子析出量及析出总量比较均无差异(P > 0.05)；②3代合金间失重腐蚀速率比较无差异(P > 0.05)；③扫描电镜显示，浸泡前，3代合金表面均可见均匀的划痕，浸泡后可见明显腐蚀痕迹；④浸泡后，3代合金表面粗糙度均增加，Ⅱ、Ⅲ代合金表面粗糙度与Ⅰ代合金相比无差异(P > 0.05)；⑤浸泡后，3代合金表面自由能均有所增加，但各代合金之间表面自由能比较无差异(P > 0.05)；⑥结果表明，经反复熔铸1-3次后，金铂烤瓷合金的耐腐蚀性能无明显变化。

ORCID: 0000-0002-5061-6386(陈熙)

中国组织工程研究杂志出版内容重点：生物材料；骨生物材料; 口腔生物材料; 纳米材料; 缓释材料; 材料相容性；组织工程

关键词: 口腔材料, 反复熔铸, 金铂烤瓷合金, 耐腐蚀性能, 金铂烤瓷合金浸泡

Abstract:

BACKGROUND: Our previous findings indicate that the chemical composition and mechanical properties of gold-platinum (Au-Pt) ceramic alloy have no changes after repeated casting.

OBJECTIVE: To investigate the influences of repeated casting on the corrosion resistance of Au-Pt ceramic alloy.
METHODS: The Au-Pt ceramic alloy (primary alloy) was taken to carry out the first casting, and the generation I alloy (the scrap alloy such as the base and the casting channel) was obtained under the molten casting environment which was vacuum-added argon gas. The first-generation alloy was treated before recasting, in order to obtain the generation II alloy (base, cast iron and other scrap alloys), and then to obtain the generation III alloy (base, cast steel and other scrap alloys). The alloys at I-III generations were immersed in the electrolyte (pH=2.35) for 7 days. The type and concentration of metal ions in the leaching liquor were determined to calculate the corrosion rate of the immersed alloys using the weight loss method. The surface topography of the immersed alloys was observed, and in addition, the surface roughness and surface free energy of each specimen were tested.
RESULTS AND CONCLUSION: (1) After the immersion of Au-Pt ceramic alloys at different generations, only three kinds of elements including indium, tin, iron were detected. The amount of indium deposited was the highest among the three kinds of elements, but there was no difference in the amount of metal ions deposited at each generation and the total amount of metal ions deposited at I-III generations among the various alloys (P > 0.05). (3) There was no difference in the corrosion rate between the generation III alloys (P > 0.05). (3) Under the scanning electron microscope, the surface of the alloys at I-III generations showed uniform scratches before immersion, and obvious corrosion marks were observed after immersion. (4) After immersion, the surface roughness of the alloys at I-III generations was increased, and the surface roughness of the generation II and III alloys showed no difference from that of the generation I alloys (P > 0.05). (5) After immersion, the surface free energy of the alloys at I-III generations was increased, but there was no difference between different generations of the alloys (P > 0.05). Overall, the corrosion resistance of Au-Pt ceramic alloy has no significant change after casting 1-3 times. 

Key words: Metal Ceramic Alloys, Corrosion, Tissue Engineering

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