Whole-crown: photo, reviews, specs

The development of modern dentistry goes by leaps and bounds.And now you can save even a huge extent of the destroyed teeth.The simplest method is the installation of the crown.

In dental clinics presented a wide range of such prostheses.On what to stop the choice and not get confused in the diversity?

What kinds of crowns are available

1. Ceramic, produced from porcelain base. There is no metal frame.Outwardly very similar to natural tooth enamel.They have reflective abilities.Among the shortcomings can be called high cost and the lack of the possibility of bridged structures.Sometimes patients complain that the ceramic is broken off.But it happens with those who constantly eat solid food.Still produce prostheses on zirconium frame and cover with porcelain mass.This is one of the most modern types of dental crowns.They fit well against the gums, they are strong enough.But they are quite expensive.
2. Solid-cast .Some of the most popular and affordable.They will be discussed further on.
   

   Solid cast crown

1. Combined dentures. Made of metal and ceramics, they are made from two components.The frame is made of metal from the outside with a ceramic.It can be made from different types of metal: nickel, chrome or noble: gold, silver or even platinum.These types of dentures are strong enough to simulate natural enamel.Under the influence of food acids do not change color and do not fade.Among the shortcomings can be called that during operation, a metal frame may be exposed.Often, before the installation of such crowns, the tooth is depulled.For the production of this kind of construction, metal and plastics are combined. They have an affordable cost, suitable for temporary prosthetics .But they also have many drawbacks.Over time, chips and cracks can appear, a metal frame can be seen, which makes their use for the smile zone unacceptable.

What kind of crowns is a personal matter for a person.Each has its own priorities.Someone is most concerned about the cost, and someone wants to look great and the aesthetic side of the issue in priority.

Solid cast crowns are the most popular and affordable dentures for ordinary people.About them will be discussed in the article.

Materials for the

To preserve or restore the chewing functions of the jaw, metal solid prostheses are used.They are produced by the method of one-stage solid casting of high-strength metals, which makes it possible not to combine them with each other.

In order to increase the strength of solid cast crowns, an alloy of chromium with nickel or cobalt is used. For the manufacture of dental prostheses, titanium perfectly fits. This metal, which in time does not change its initial color, it does not react to the aggressive environment in the mouth.

Another titanium is safe for the body, does not have a negative effect on it, does not tear away tissues.

What are the types of cast crowns

Modern dental technology makes it possible to use such kinds of solid crowns:

• are produced simply of metal alloys and carefully polished, without sputtering;
• dental crowns made of metal with deposition of precious metals, for example, platinum, gold or silver;
• with lining.To improve the attractiveness on the outside of the crown, special ceramic or plastic pads are created.The minus of such crowns is the appearance of chips on the lining and high cost;
• bridge type combined prosthesis.It can be used for simultaneous prosthetics of the anterior and lateral teeth.On the front teeth, for the attraction is done facing, the rest will remain metal.

Stages of production

Impression of the teeth

In order to obtain a quality cast crown, it is necessary to withstand the clinical and laboratory stages of production.

The first stage of the examines and sanitizes the oral cavity.Then, the doctor makes a mold of the tooth that needs prosthetics.Dentists use impression materials from silicone, they well reflect the anatomical features of the jaw apparatus.This material does not cause allergies and does not stick to the teeth.

To ensure that patients quickly get used to, they feel comfortable and then solid prostheses do not cause uncomfortable sensations, they are provided with temporary crowns.

Then in dental technicians produce a split gypsum model of the future prosthesis.Later on this model create a wax preform, then it is changed to a metal alloy.

The second clinical stage of involves the sanitation and preparation of the oral cavity for the installation of solid crowns.To ensure that they are densely and very accurately put on the right place, the tooth tissue is grinded in a certain way.Make small holes in the prosthesis, put it on the right tooth, fill it with wax.Excess wax will come out through the hole.

Then the doctor examines all the errors and sends the design for revision, and the lab technician assesses the degree of coincidence of the gypsum model and the finished product.After that begins to polish the cast tooth.

The third stage of the is the fitting of the product.Live tooth should be covered as much as possible.The whole structure should be easy to fit between the teeth, but without a strong depression in the gum.

If any inaccuracies or inconsistencies occur, the crown is returned to the laboratory for processing and grinding off excess material.

It takes usually more than a month to make a solid crown.

If the prosthesis is perfectly suitable, it is fixed with a special cement.Patients after the installation of a new prosthesis should not experience any unpleasant sensations.Chewing functions of the oral cavity should not be limited in any way.

Advantages of solid-cast structures

Solid cast crowns in many respects exceed stamped ones that used to be very popular, but are now almost not used.Stamping was made from special sleeves, which were worn on a column resembling a human's tooth.

Then the cartridge was taped to make it in the shape of a tooth.Such prostheses were inaccurate and could in some places loosely adhere to the jaw members.The tooth tissues in this case rotted.

Stamped bridges were connected to each other using a soldering method, which reduced the life of this kind of crowns.On the mucous membranes of the oral cavity inflammatory processes often occurred in patients, due to the use of different metals.

Solid casting in comparison with stamped, have many advantages:

• long service life, more than a decade.During their production the anatomical features of the patient's jaw are taken into account.Such a denture fits tightly to the surface of the tooth.Due to this, the food does not fall under the prosthesis;
• bridges are produced without adhesions by the method of solid casting and have a long service life.
  

  One-piece bridged prosthesis made of three crowns

For the front part it is not aesthetically pleasing to use cast prostheses, usually metal ceramics are used.But here for prosthetics of chewing teeth, it is best to use solid-cast elements of .

When installing this kind of crowns, the tooth tissue is ground less in comparison with the installation of metal-ceramic prostheses.Whole-crown as in the photo below is made quite simply.First they create an anatomical mold, then it is cast.Such prostheses are relatively inexpensive.