不同基底材料与饰面瓷结合界面的实验研究

发布时间：2018-06-07 09:08

本文选题：陶瓷 + 金瓷界面　；参考：《大连医科大学》2012年硕士论文

【摘要】：目的：通过电子探针观察不同基底材料与饰面瓷之间界面化学元素的变化，，定性分析不同基底材料与饰面瓷之间化学结合的方式和强度。材料和方法：以上颌侧切牙为模型，分别制作镍铬合金、氧化锆、金钯合金(Au-Pd合金)、压铸瓷基底、钴铬合金、混合金钯合金(混合Au-Pd合金)基底冠各一个，依次记为1、2、3、4、5、6组。混合金钯合金为将1/3比例的回收旧金属加入到实验样本内。然后对六个基底冠依厂家推荐的程序进行烤瓷，分别烧结遮色瓷和体瓷，将唇侧瓷层总厚度控制在唇侧2mm左右。将六个实验样本用环氧树脂包埋在长4cm宽3cm高2cm的聚醚橡胶模具内，静置一夜待环氧树脂凝固。用慢速锯沿实验样本的纵轴切开，对切面进行打磨、抛光、超声清洗。其中氧化锆样本与压铸瓷样本在真空下喷金，然后用电子显微镜在2000倍下对镍铬合金、氧化锆基底、金钯合金、钴铬合金、混合金钯合金五种基底冠进行界面观察，用电子探针线扫描界面，在界面两侧10微米的范围内读取数据探查界面元素的交换转移情况，点扫描界面基底冠侧;在50倍的放大倍数下对压铸瓷进行界面观察以及电子探针的线扫描。结果：1组（镍铬基底）镍铬基底冠检测出Al、Si、Ni、Cr、O。Al Si在2微米的范围渗透入镍铬基底冠，Ni、Cr在2微米的范围内进入饰面瓷内。 2组（氧化锆基底）基底冠检测出Al、Si，Al、Si在2微米的范围内进入基底冠并缓慢减少。 3组（金钯基底）基底冠侧检测出Al、Na、Si、Sn、Pt、Au、In，进入基底冠1微米。 4组（压铸瓷基底）电镜下未发现明显的结合层，整个图像完整无缝隙，未见饰面瓷与压铸瓷的结合界面。 5组(钴铬基底)基底冠发现C、Si、Cr、Co，Si在界面向基底冠方向缓慢下降约2微米。Cr、Co在界面到饰面瓷方向内也是呈逐步减少的趋势，进入饰面瓷内约两微米的距离 6组（混合金钯基底）基底冠侧发现了Al、K、Fe、Sn、Pt、Au。线扫描结果显示Pt在界面处向饰面瓷内渗透约一微米左右。结论：镍铬、氧化锆、金钯、钴铬、混合金钯五种不同基底冠与饰面瓷之间均发生了程度不同的元素转移变化，随着界面深度的变化，元素的转移变化强度减弱直至消失，证明这五种基底冠在和饰面瓷的烧结过程中均发生了化学结合。压铸瓷烤瓷全冠在电镜放大50倍下未未见饰面瓷与压铸瓷的结合界面。线扫描结果显示Si、Na、K在整个扫描范围内无明显波动。这一观察结果说明了压铸瓷基底与饰面瓷之间的成分相似与均一性。
[Abstract]:Objective: to observe the change of interfacial chemical elements between different substrate materials and veneer porcelain by electron probe, and to qualitatively analyze the way and strength of chemical binding between different substrate materials and veneer porcelain. Materials and methods: Ni-Cr alloy, zirconia, gold-palladium alloy Au-Pd alloy, die-cast porcelain substrate, cobalt-chromium alloy and mixed alloy palladium alloy (mixed Au-Pd alloy) substrate crown were made by using the above maxillary lateral incisors as models. The mixed alloy palladium alloy is used to add a 1 / 3 ratio of recovered old metal to the experimental sample. Then the six base crowns were sintered to cover the porcelain and the body porcelain according to the procedure recommended by the manufacturer. The total thickness of the porcelain layer on the lip side was controlled about the 2mm of the lip side. Six experimental samples were embedded with epoxy resin in polyether rubber die with long 4cm wide 3cm and high 2cm. Use slow saws to cut along the longitudinal axis of experimental samples, polishing, polishing and ultrasonic cleaning. The samples of zirconia and die-cast porcelain were sprayed in vacuum, and then the interfacial observation of nickel chromium alloy, zirconia substrate, gold palladium alloy, cobalt chromium alloy and mixed alloy palladium alloy was carried out at 2000 times by electron microscope. In the range of 10 micron on both sides of the interface, the electron probe line scanning interface is used to read the data to detect the exchange and transfer of the interface elements, and the base crown of the point scanning interface is obtained. The interface of die-cast porcelain was observed at 50 times magnification and the scanning of electron probe was carried out. Results in group 1 (Ni-Cr substrate), Ni-Cr substrate crowns were detected to have infiltrated into Ni-Cr substrates in the range of 2 渭 m, and niocr into veneer porcelain in the range of 2 渭 m. In the two groups (zirconia substrate), the Al _ (Si-Si) _ (Si) was detected to enter the substrate crown in the range of 2 渭 m and to decrease slowly. In three groups (gold and palladium substrates), Albumin was detected on the coronal side of the substrate, and it entered 1 micron of the basal crown. In the four groups (die-cast porcelain substrate), no obvious bonding layer was found under electron microscope, and the whole image was complete and seamless, and there was no interface between veneer porcelain and die-cast porcelain. Group 5 (Cobalt-Chromium substrate) substrate crown found that Causiu Cr-CoSi slowly decreased about 2 渭 m from the interface to the substrate crown. Cr-Co also showed a decreasing trend in the direction from the interface to the facing porcelain, and the distance between the two microns into the decorative porcelain was about two microns. In 6 groups (mixed alloy palladium substrates), the Al _ (K) K _ (Fe) Sn _ (PtN) au was found on the coronal side of the substrate. The results of line scanning show that Pt permeates about one micron into the veneer porcelain at the interface. Conclusion: nickel chromium, zirconia, gold palladium, cobalt chromium and mixed alloy palladium all have different degree of element transfer between the porcelain with different substrate crowns. With the change of interface depth, the change intensity of element transfer decreases and disappears. It is proved that the five kinds of substrate crowns are chemically bonded in the sintering process of the veneer porcelain. There was no interface between veneer porcelain and die-cast porcelain when the crown was magnified 50 times by electron microscope. The results of linear scanning show that there is no obvious fluctuation in the whole scanning range. This observation indicates the similarity and uniformity of the composition between the die cast porcelain substrate and the veneer porcelain.
【学位授予单位】：大连医科大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：R783.1

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