抄録
Introduction: The porcelain in the PFM systems is the type of porcelain which is widely used in dentistry. For this reason, efforts have been made in this project to make dental porcelain powder of a metal bonding type.
Material and Method: In order to do so, Vita opaque porcelain powder (Vmk 68 N) with ISO 1995 specifications was used to produce the new powder. First, the Vita opaque porcelain powder was tested and analyzed by using a scanning electron microscope (SEM) and through X-ray diffraction (XRD) and X-ray fluorescence (XRF) analysis. After the Vita powder compound had been obtained and after it had been compared with the existing information and tables, a similar powder was made by using domestically-produced raw materials. After different formulas had been prepared in the course of several stages and after the porcelain powder had been made on the basis of the formulas, a sample of each porcelain powder produced underwent various tests following the melting, fritting, grinding, sifting, heating and granulating stages.
Results and discussion: the characteristics of the opaque porcelain powder produced (T1/14) were similar to those of Vita opaque porcelain powder, and its bending strength, opacity, baking temperature, glazing, contraction degree and adhesion to metal were confirmed through different tests.
Conclusion: According to this study, body porcelain was used for PFM system contains different components for creates satiable chrematistics. This material divided in these category. Opacifier, Glass modifier, Color modifier, Thermal Expansion adapter. In this research discussed about each type of these materials and Have close Examination on advantage and disadvantage of them.
