he importance of dental aesthetic is increasing day by day in dentistry. Thanks to new improvements in technology, aesthetical dental procedures are becoming more prominent. Recently, zirconia based porcelains takes place instead of porcelains with metal frameworks that have been used for long years for crown preparations. Zirconia crowns provide more aesthetic appearance than the older metal crowns thanks to their light transmission. Beside, gingival fitting of zirconia crowns are very good. In contrast to metal based crowns, they never cause disease or allergic problem on gingiva. In zirconia based porcelains, zirconium which is a white colored alloy is used as a framework instead of metal. Zirconium based porcelains are both natural and aesthetic for anterior teeth usage and also resistant enough for posterior teeth usage. Therefore, zirconia based porcelains can be preferred safely for anterior and posterior teeth
Why Should Zirconium Porcelain Be Preferred? A complete harmony with natural teeth can be achieved due to their light transmission characteristics. Thanks to this, a perfect aesthetical result can be obtained. Since it doesn’t have any metal reflection underneath, the unnatural appearance in metal based porcelains definitely not occurs in zirconia. Gingival fitting is better than classical metal based porcelains. Gingiva discoloration which is frequently observed in metal based porcelains is never observed in zirconia based porcelains. It is not allergic because it is 99% tissue friendly material. It has more advantages in terms of general body health than the metal based prothesis. They conduct less heat to teeth than metal based prothesis because their insulation feature is very good. By this means, hot/cold sensitivity is not occur for teeth with zirconium based porcelain. They can safely be used for posterior teeth due to their high resistant with 900-1200 mega pascal. Beside their strength, they are also delicate and aesthetic enough for light transmission. Perfect aesthetical results can be obtained in even very dark stained teeth because they have masking ability for the underneath tooth color. They fit closely on prepared tooth surface due to their quite sensitive production procedure. Therefore, there is no gap between the tooth and zirconium porcelain for bacterial leakage so they don’t allow decay formation between tooth and crown. They are healthy materials and they don’t cause tasting disorder, gingival problems, decay formation. They can be used for both anterior and posterior teeth safely.