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Porcelain fused to metal Restorations   Lalit Kumar Bida,Ravi Sher Singh Toor and Charu Bida

Porcelain fused to metal Restorations

96 страниц. 2014 год.
LAP Lambert Academic Publishing
The last 50 years have witnessed an unbelievable amount of change in restorative dentistry. The evolution of materials and techniques has been so enormous that it has become virtually impractical for the clinician to keep abreast. An area of major change has been the ceramic restoration. The first break through came about with the introduction of the porcelain-fused-to-metal restoration. The ability to fire and fuse porcelain against gold alloy or base metals considerably extended the use of ceramic materials. Suddenly it was possible not only to generate single units of porcelain for anterior and posterior teeth but also to fabricate extended partial dentures. It is important to note that ceramic veneering of metal crowns or copings resulted in changes not only to the ceramic material but also to the casting alloys themselves. By using metal substrates with a higher casting temperature and a ceramic material with a lower fusion range, highly esthetic and durable restorations could be...
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