How to choose a dental crown
Types of crowns
There are several types of dental crowns:
- metal dental crowns;
- dental ceramics from solid ceramics;
- metal crowns, covered with ceramic outside;
- metal crowns with a surface of plastic;
- crowns from zirconium and aluminum oxides.
Quality of dental crowns
The best in quality are zirconium oxide and aluminum crowns, as they are made of a very durable material. The process of their manufacture is very difficult, therefore special equipment is used for this. Their service life reaches approximately from 15 to 20 years, and also they do not undergo shrinkage and do not change color and shape during the whole time.
The second place is occupied by metal dental crowns. Their strength and durability is not very different from the crowns of zirconium oxide and aluminum. However, the metal itself is very hard in contrast to the enamel of the teeth, so over time, such crowns will erase the top layer of adjacent teeth on the opposite jaw.
In the third place are cermet dental crowns. The base of the metal gives them strength, and the outer part, covered with ceramics - aesthetics. Crowns, made entirely of ceramics, are often very fragile, although the more expensive ceramics are, the better and more reliable it is.
Metal plastic crowns are in the last place, because, despite their solid base, they are able to change not only the shape but also the color. The disadvantage of this material is frequent chipping of plastic from metal due to poor bonding. The shelf life of such crowns is no more than three years, so they are more used as a temporary option for the period of getting used to new prostheses.
Aesthetics of dental crowns
The most aesthetic are the crowns of zirconium oxide and aluminum, as when fixed in the mouth, they shine in the light just like natural teeth. To distinguish them from the present is almost impossible.
The material used in the manufacture of ceramic crowns, is natural and the most affordable for the restoration of teeth. And metal ceramics, in general, is recommended only for restoration of posterior teeth, since when they are installed in place of the front teeth, their base will appear through.
Metal-based crowns are the worst, as they do not meet any of the aesthetic requirements.
Cost of dental crowns
The most expensive crowns are prostheses made of zirconium oxide, which is explained by their strength and durability, as well as high aesthetics. All other crowns are approximately on the same price line, except for metal-plastic, as their use is limited, because they are used only as temporary crowns.
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