The crown is a tooth prosthesis that helps to restore the normal anatomical shape of the tooth, while maintaining its chewing function and giving a smile aesthetic appearance. It is necessary to strengthen the destroyed tooth, so that the destruction does not go further. There are single or interconnected. The latter is called a bridge prosthesis.
Before installing such a prosthesis, the tooth firstly fills the root canals, restoring the coronal part with a filling. Then a tooth grind round the 1.5-2 mmThis is the thickness of the future crown. Its edge should sink into the gum by 0.3-0.5 mm.
Indications for installation
Crowns are installed in the following cases:
- If it is destroyed by more than half. In most cases, such teeth removed nerves, causing them to become brittle and lifeless.
- If hard tooth tissue strongly erased and it is well noticeable. Such prostheses in this situation help to eliminate this problem, do not allow the bite to lose height, restoring it.
- If there is no tooth. The crown in this case is installed in its place, and the adjacent teeth are ground under the supports of the bridge.
- If the tooth has changed color, shape or size. In this case wide gaps are eliminated between them.
If the tooth is too loose, it is a contraindication for the installation of the prosthesis.
Types of crowns
Depending on the materials used, the crowns are of the following types:
- Solid cast.
- On implants.
Crown of metal-ceramic characterized by great strength, beautiful appearance and reasonable price. Their disadvantage is that the teeth are ground on each side by 1.5-2 mm and depulsed.
How much does a crown for a metal-ceramic tooth cost? For example, made from German high-quality ceramics or Japanese ceramics with a cobalt-chrome alloy of excellent quality, provided that it was made by an orthopedic doctor and a highly qualified dental technician, will cost about 6,000 rubles.
The dental clinics can offer metal ceramic crown worth from 4.5 thousand rubles. It is mainly made from cheap materials, such as metal or ceramic, domestic production or Belarusian. Doctors who are not highly qualified also install them.
If the cermet is made of gold-palladium or gold-platinum alloy, its price will fluctuate within 9,000 rubles, excluding the value of gold. Such a cermet tooth with gold will cost about 17,000 rubles.
There are cases when the patient is first put temporary crowns. The cost of one unit will be equal to 800-1000 rubles, which is added to the basic value.
Their main difference from metal ceramics is that they are entirely made of a ceramic mass that does not have a metal frame inside. This is significant improves the appearance of dentures, they can hardly be distinguished from real teeth. Ceramic crowns are made of porcelain and zirconium dioxide.
Porcelain crowns remarkably resemble natural teeth, because this material is similar in its properties to the natural enamel of the tooth. It is not recommended to make bridges of such material.Their cost is quite high - about 13 000 rubles for one unit. To this is added the cost of a temporary plastic crown.
Zirconia crowns are made from a very durable framework based on zirconia, and a porcelain paste is applied on top of it. They have a lot of advantages - they have a wonderful appearance, they fit very precisely, they are very durable, reliable, and durable. The disadvantage is the high price. The cost of one unit makes 16 000 rubles. To this is added the cost of temporary plastic dentures.
- Solid cast.
Solid dental constructions are made in a modern way when they are cast from metal according to an exact model, and not stamped from a sleeve. The material used is a cobalt-chrome alloy. Their price begins from 3.6 thousand rubles. They can be made of gold. Their production is carried out in public dental clinics, because working with this metal requires a license, which is very difficult to obtain. The price of gold crowns is the sum of the value of gold and work. Large dentures require a lot of gold, so the cost will be more expensive than usual.
Such crowns are considered to be combined. Make them whole casting method of cobalt-chrome alloy, and the front revet white plastic. The appearance is quite aesthetic. Disadvantages metalplastic teeth have the following: after a while, the plastic changes from white to gray. In addition, the plastic can absorb liquid and swells. Because of this, after some time it will emanate the smell of uncleaned teeth.
Such prostheses are unreliable. If you squeeze your teeth hard, the lining of plastic can easily fall out. In addition, plastic is not entirely safe for the human body because it contains a small amount of active chemical monomer, inpretty long.
Despite these shortcomings, such dentures are considered very popular among dental clinic clients because of their low price, which amounts to 4,000 rubles.
- Dental crowns on implants.
The cost of construction for implants directly depends on the material used. This may be cermet or metalless ceramics. The cost of crowns for implants is very different from the cost of conventional ones. This is due to the fact that harder to make and they are fixed to the implant differently.
The cost of a metal-ceramic crown for implants ranges from 10,000 to 14,000 rubles. Metal-free ceramics has a price of 25,000 rubles per unit.