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The success of the porcelain fused to metal (PFM) restoration depends not only on the choice of materials but to a larger degree on the technical skills and understanding of both the clinicians and technicians. The design of the compositions of PFM is very important to esthetic restorative materials applying to porcelain. The purpose of this study is characteristics of high gold alloys for dental porcelain- fused to metal. The high Au alloy containing high gold contents is respectively Au(86%), Pt(5%), Pd (4%), Ag(2%), In(1%), Sn(1%), Ti(1%). These alloys are composed mainly of gold, platinium, silver and palladium with a few percent of the additional elements. By the addition of small amounts of elements such as In, Sn Ti, the fine grain castings are produced in gold alloy. These alloys have mechanical properties characteristics of Type I and Typ ∏ gold alloys. These alloys are useful to porcelain-metal restorations and dental laboratory. Also dental laboratory tests are successful to porcelain-metal restorations using these alloys. The porcelain fused to metal (PFM) alloys containing gold are commonly use for dental purposes in dental laboratory. The chief effectiveness to the development of porcelain fused to metal(PFM) as a restorative material, either in prosthetic or crown & bridge procedures, is a success in which the economical and commercial factors is the principal force. Clinical application of these alloys can be directed toward the economical and commercial manufacture and production.
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