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 developed. This method of restoring missing teeth
continues to play a very important role in the field of
prosthodontics.
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