Modern dental crowns: which ones are better for dental prosthetics?We deal with dentists

Sooner or later, in the life of almost everyone, the question arises of replacing non-treatable or lost teeth with artificial ones.In such a situation, to refuse the procedure for installing new teeth is not recommended.After all, if you do not put the crown on the damaged tooth in time, then its complete loss may occur.In this regard, for many people the question is urgent which crowns are better for teeth, since a healthy and beautiful smile is a condition of a positive image.

Modern tooth crowns

An artificial tooth crown is a denture that is placed on a partially or completely destroyed tooth.The purpose of this setup is to to restore the chewing function of and maintain the proper occlusion.

Technologies of dental prosthetics are being improved, new materials are emerging for the preparation of crowns and facing of damaged teeth.Therefore, before choosing a crown for yourself, it is worth familiarizing yourself with the materials from which they are made.

Metal

Metal is the most famous and economical material for making crowns.However, the metal crown has a disadvantage from an aesthetic point of view, since, despite its durability and strength, it looks like a processed metal tooth in the mouth.Such crowns are inexpensive, so they are usually installed

on the chewing teeth of , which are not visible when communicating.Term of use of crowns from metal from ten till twelve years.

Methods of manufacturing of metal tooth structures:

1. Molded method.According to the pre-made impression, the prosthesis is made by direct casting.Use for this purpose nickel or cobalt, but can use alloys of silver, titanium or palladium.At the request of the patient, can be coated with gold plating.
2. Method of stamping.In this case, the end product is stamped from the prepared sleeve.Has this way two advantages of :
   • Low price.
   • Do not remove the nerve before installing the prosthesis.

   Disadvantages of stamping:

   • Due to the fact that the walls of the stamping are thin, such products quickly wear out.
   • The design at the level of the gum loosely covers the neck of the tooth, as it does not exactly repeat its anatomical features.This allows you to penetrate the cover of the remains of food, and, therefore, bacteria, resulting in the destruction of enamel.

   Indications for use:

   • Stamping is used for defects that can not be restored by sealing or inserting.
   • The prosthesis can be put in cases of uncertainty of tooth strength after its treatment.
   • Stamping is used as a supporting element of the orthopedic structure.
   • The crown can be installed if the patient has a pathological abrasion of the tooth enamel or various severe forms of non-carious lesions( hypoplasia, fluorosis).

Non-metallic

1. made of porcelain or plastic , they are quite aesthetic, because they are similar to natural ones.The minus of such crowns is that they are not strong enough.Plastic constructions are the cheapest option, however, this material absorbs food colors.After two to three years, the color of the crowns becomes unpleasant, in addition, it differs from the color of tooth enamel.
2. from non-metal ceramics based on zirconium oxide is one of the most popular.Many dentists believe that this is the best material.Since non-metal ceramics have aesthetic qualities, crowns from it are best placed on the front teeth.The only drawback is the high price.

Indications for use:

• Restoration of destroyed teeth.
• Manufacture of artificial teeth on implants and constructions on pins.

Metal Ceramic

Their frame, made of metal, is faced with a ceramic mass.Due to this, such crowns are durable, durable and naturally look like .The color of the cermet can be selected individually for each patient.You can put it in the most difficult cases.Metal ceramics is durable and costs two to three times less than products made of zirconium oxide.Therefore, the structures of cermets are considered the best and are very popular among the population.

Indications for use:

• Distortions in the shape and color of dental structures that have arisen as a result of pathological processes.
• Injuries.
• Wedge-shaped defects.
• Increased abrasion of tooth enamel.
• Fluorosis.
• Caries.
• Hereditary anomalies of the position and shape of the teeth.
• Allergy to plastics.

Cons of Cermets:

• It is necessary to remove the nerves.
• A large volume of hard fabrics is rubbed under the construction.
• Since the construction has a metal base, the blueness of the gingival margin may appear.
• Due to the presence of a metal frame, the crown may differ in color from the tooth enamel, as it does not have the translucency inherent in enamel natural.Therefore, the designs can be slightly noticeable, especially on the front panel.

Porcelain

This is a real work of art of high-class specialists .Crowns from porcelain fully correspond to the appearance of tooth enamel, and their service life is not inferior to ceramic products.

Disadvantages of such prosthetics:

• High cost of work and material.
• They can be installed only on a single tooth.

Combined

Consist of a metal frame lined with ceramics or any other material.Allows this type of prosthetics not only to preserve the aesthetics of the oral cavity, but also to save .For the front teeth, the lining can be chosen from more expensive materials, and on chewing - to put the construction of inexpensive metal.

Stages of manufacture

1. Casts are taken from both jaws, which are needed in order to accurately produce the crown, taking into account adjacent teeth.To make casts use a special impression mass.
2. In the plaster casting laboratory, a model is cast on which a sample of the future crown is modeled from the wax.
3. With cement, temporary prostheses are fixed, which will stand as long as permanent ones are made.Cement for such fixation is applied special, allowing, if necessary, to remove temporary constructions.
4. A frame is prepared and used, which, after clarifying the color, is lined with ceramics or other material.

Installation steps

1. The doctor visually inspects the tooth and always takes an X-ray.If necessary, it seals the canals and treats them.
2. The nerve is removed under anesthesia and the turning is performed taking into account the thickness of the walls of the structure.To make the crown easy to wear, the tooth should converge upward.In the cervical area of ​​the tooth, it is necessary to make benches.
3. The dentist decides whether to put live or dead teeth on the structure and, if necessary, conduct their depulpation.
4. On the missing part of the tooth is installed a cultured metal tab, which helps to fix the structure.
5. In the absence of an anatomical crown of a tooth, a pin is inserted into the root.
6. They are photographed and sent to the lab.
7. A finished design is used, its color is chosen.
8. At the discretion of the doctor, the crown is fixed with temporary or permanent cement.

Contraindications

• Allergy to the materials from which the crowns are made.
• Looseness of the tooth.
• Incorrect bite.
• Insufficient height of the crown part of the tooth.
• Thin walls of the lower anterior teeth.
• Diseases of the gums.
• Age under sixteen.

Which crowns should be placed

• When selecting a tooth crown, the wishes and financial capabilities of the patient, as well as indications and contraindications for the installation, should be taken into account.
• Metal cast tooth structures restore the chewing function of the tooth.However, outwardly they are the most unaesthetic.
• Cermet tooth crowns are characterized by naturalness and strength .But their appearance is inferior to the crowns made of ceramics.The advantage of cermets is that it can be placed on teeth that do not have a nerve removed.The negative aspect of this design is the gap between the tooth and the crown, because of which the metal rim of the structure is visible.
• Whole ceramic designs are the most approximate option to natural teeth.They also have functional endurance and high biocompatibility.

Having an idea of ​​modern crowns, knowing their pros and cons, you can competently approach prosthetics, do not make the mistake with the optimal choice, properly dispose of money and do no harm to your health.