A Basic Study on the Porcelain Veneered Crown by Sintered Metal Techinique

近年来，Heratec Crown和Degusint通过在烧结的贵金属上烧制瓷器来实现。这些产品具有瓷套冠和瓷熔附金属冠的特点，可以在相对较短的时间内完成瓷冠（Heratec Crown和Degusint）。因此，我们在这一领域进行了基础研究，研究使用这些烧结贵金属的陶瓷冠的精度和强度。结果，与烤瓷熔附金属冠相比，这种冠明显表现出较低的强度。在提高冠强度方面，本实验室的研究结果表明，加强冠的内部比加强外部更有效。因此，认为这些烧结的贵金属熔融陶瓷冠的强度是材料强度不足的产物。 ...更多信息 贵金属层和陶瓷与金属的结合。因此，今年对这些强度进行了详细的研究。对每种类型的烧结贵金属的检查表明，冠的强度的强度涉及拉伸强度和弹性模量的差异。此外，关于金属和瓷之间的连接，作为SEM和EDX观察的结果，很明显，即使通过Heratec冠，金属层和瓷层之间也只有简单的机械连接，Degusint具有熔合机制，铟在熔结中的分布与金属烤瓷冠不同，而烧结贵金属的优点是我们计划对这些金属进行研究和开发，使其具有适当的弹性模量、高强度、一定的延伸率、与瓷器的牢固融合等特性，我们可以获得足够的陶瓷冠强度，并对其适合性进行研究。16FA01：贴面冠减

In recent years, Heratec Crown and Degusint has been realized by the baking of porcelain onto sintered precious metals. These products possess characteristics of both porcelain jacket crowns and porcelain fused to metal crowns, and ceramic crowns (Heratec Crown and Degusint) can be accomplished in a comparatively short period of time. Heretofore, we have performed fundamental research in this field in terms of both the accuracy and the strength of ceramic crowns in which these sintered precious metal are used. As a result, it has become clear the such crowns, compared with porcelain fused to metal crowns, manifest significantly lower strength. Concerning the improvement of crown strength, results of the reserch done in our laboratory show that the strengthening of the inner portion of the crown is more effective than strengthening of the outer portion. It is thus thought that the strength of thesesintered precious metal fused ceramic crowns is a product of insufficient strength of the … More precious metal layr and ofthe porcelain and metal joint.Thus, a detailed study of these strength was conducted this year. Examination of each type of sintered precious metal suggested that the strength of the strength of the crowns involves the differences in tensile strength and elastic modulus. Moreover, with regards to the joint between metal and porcelain, as a result of observations by SEM and EDX,it became clear that even through Heratec Crown have only a simple mechanicaljoint between the metal layr and the porcelain layr, and the Degusint posesses a fusing mechanism, the distribution of Indium involved in the fusion is different from that in porcelain fused to metal crowns.While the advantages of sintered precious metals are being brought to light, we plan to carry out research and development of these metals with such qualities as a proper degree of elastic modulus, high strength, elongation to some extent, secure fusion to porcelain, etc., with which we can gain sufficient ceramic crown strength, and proceed in research on their accuracy of fit.16FA01 : Veneered Crown Less