Циркония Все Фарфоровые коронки

Zirconia - Porcelain crowns are an exciting recent development in dentistry that allow us to restore badly broken down teeth with a material matches the characteristics of our own enamel more closely. Unlike the crowns of the past which had a metal substructure and would allow light to pass through them, porcelain is translucent, just like enamel. This givesto ita much more natural, life-like appearance allowing us to restore teeth in such a natural way as to make them unnoticeable. In addition, an all porcelain crown can be bonded firmly to your tooth, which provides greater strength than the traditional crown. Zirconium based crowns--Crowns with zirconia copings are nearly as strong as porcelain fused to metal crowns. They are suitable for posterior, as well as anterior teeth, and they have nearly the same excellent esthetics as all-porcelain crowns. The tooth is prepared in the same manner as it would be for an all-porcelain crown, with a wide chamfer and no bevel. Thus, while the porcelain rarely breaks off the coping on this type of crown, the core can become fairly thin during the preparation of an anterior tooth. These crowns cannot be bonded to the underlying core, and are generally cemented in place with the same cements used to lute a porcelain fused to metal crown. This means that the chamfer is somewhat less involved in supplying stability to the crown than it would be on an all-porcelain crown. In other words, zirconia crowns offer no ferrule effect at all. In addition, since the porcelain veneer is applied by hand, the marginal fit of the crown margin to the chamfer is less perfect than either the fit of a metal coping with a bevel, or an all-porcelain crown without a coping. All-porcelain crowns maintain a translucency that makes them hard to tell from natural teeth. Without metal, the problem of a dark line at the edge of the gums is eliminated. This allows us in many cases to place the edge of the crown above the gumline, and that's healthier for your tooth and gums.Feartures:Indistinguishable from real teeth Highly aesthetic due to natural appearance Form and colour can be individually adjusted to your dental situation Exceptional durability and stability Biocompatible, tissue-friendly and suitable for patients with allergies No unpleasant hot and cold sensation