MECHANICAL CHEMICAL AND OPTICAL CHARACTERSITICS OF ZIRCONIA CERAMICS FOR DENTAL RESTORATIONS

Abstract

Zirconia, also known as ?ceramic steel? has been used as a dental biomaterial for several decades. Its fracture toughness and bend strength are increased by the toughening transformation mechanism. The aesthetic is compromised by greyish-white appearance and poor translucency. Zirconia dental ceramics exhibit sufficient mechanical strength and toughness to allow their use in low-load areas of the mouth for longer restoration lifetimes. The purpose of this systematic review was to explain information for mechanical, chemical and optical requirements of monolithic dental restorations. Transformation-toughened zirconia offer the best mechanical properties and long-term stability, zirconia-toughened lithium silicate offers the best aesthetic outcomes and cubic stabilized zirconia offer a potential compromise. The properties of these materials can be changed to certain degree with appropriate application of intrinsic and extrinsic parameters