Everything you need to know about metal-ceramic crowns

Some patients love innovations in dentistry, while others prefer the unchanged classics, which include metal-ceramic dental crowns. These products have long gained popularity due to their affordable price and high durability. But despite these advantages, cermet has its own disadvantages, which we will talk about a little later.

What does a metal-ceramic crown look like and what does it consist of?

,etal ceramic crowns RigaA metal-ceramic crown has two layers: one - metal, acts as a frame (a cap that is put on the tooth), the second — ceramic, applied over the metal and is responsible for aesthetics.

Thanks to the metal base, the crown adheres to the teeth quite firmly and has high wear resistance, and ceramics, due to artistic work, are repainted to match the color of your teeth so that it is almost impossible to distinguish it.

What metal are metal-ceramic crowns made of?

Now you can find several types of metal from which crowns are made:

  • Nickel. Flexible material that is comfortable to use, but may cause an allergic reaction;
  • Chromium-cobalt. The best option for both biocompatibility and price. Does not cause allergies and prevents tooth caries;
  • Molybdenum. They are not used in pure form, but added to alloys to increase the elasticity of the metal;
  • Titanium. Hypoallergenic material, but rather expensive, so it is used less often.
  • Gold. Gold crowns are now made only to order, due to the high cost of metal, but it should be admitted that gold crowns are the best solution, since they are most biocompatible with the human body.

In modern dentistry, for the production of metal-ceramic crowns, a chromium-cobalt alloy is most often used, which is distinguished by a relatively affordable price and fairly good functionality. Previously, gold was also used to create crowns for teeth, which had the highest indicators of both aesthetics and strength. Then they began to mix it with platinum, and after a while the precious metals were abandoned due to a sharp rise in prices. So, chrome-cobalt crowns became the most optimal option. They don't have high aesthetic characteristics, but quite durable.

Metal-ceramic crowns functionality 

The price / quality ratio is quite justified for this type of material, therefore, when prosthetics, most dentists and patients prefer it.

Metal-ceramic crowns are often placed on the lateral and chewing teeth, and are also used to install bridges. Therefore, if you need to put a dental bridge, then here the option is only cermets, which will not bend and will withstand a heavy load.

Advantages of a metal-ceramic crown:

  • Prevents caries;
  • Affordable price;
  • High strength;
  • Long service life;
  • Long-lasting color.

Why metal-ceramic teeth are not the best option?

Metal crowns have a fairly large volume, since there must be many layers of ceramic to cover the bluish tint. The thickness of the cap can reach 1.5-2 mm, which implies a strong turning of the tooth, which means high trauma.

недостатки металлокерамических коронокTherefore, it is highly discouraged to install porcelain-fused-to-metal crowns on anterior and living teeth, since a nerve may be exposed during turning, which will then in any case need to be removed, which is highly undesirable.

In addition, metal-ceramic crowns have another significant drawback, namely the appearance of a bluish tint in the gum area when it begins to thin.

And over time, the metal base may be completely exposed, then it will already be necessary to carry out aesthetic work on extending the gums, and this is a rather big expense.

Disadvantages of a metal-ceramic crown:

  • High invasiveness;
  • The appearance of a bluish tinge in the gum area;
  • Some alloys can cause allergic reactions;
  • Depulpation is mandatory if the tooth is alive.
  • The enamel on the adjacent teeth is erased.

Contraindications to the installation of a metal-ceramic crown:

  • Caries and periodontal disease;
  • Allergy to metal;
  • Cannot be installed by children and adolescents;
  • Increased abrasion of teeth.

How to put a crown on a tooth and how long does it take

The process of installing a crown consists of several stages:

  • Consultation and inspection;
  • Dental treatment and nerve removal, root canal filling (optional);
  • Anesthesia and tooth grinding;
  • Removal of silicone impressions of the jaw, selection of the color of the crown;
  • Installation of a temporary crown while the manufacturing process is in progress in the laboratory;
  • Installation of a permanent crown.

In general, the whole procedure takes about 2-3 weeks, if dental treatment is not needed, since it takes time to make a crown. And the more crowns you need to make, respectively, the more time it will take.

как делаются коронки на зубыThe process of creating a dental crown from metal-ceramic consists of several steps:

  1. The metal frame is cast from the selected alloy or precious materials. The shape of the base is tried on and adjusted according to the plaster model, which was created from the impression of your jaw;
  2. A layer of ceramic material is applied and then fired to cover the metallic shade. Next comes the artwork and the natural color and transparency of the enamel is created, followed by the imposition of ceramic layers.
  3. The last stage is to cover the finished product with a special substance, to protect the crown from external influences, and also to give shine.

Caring for a metal-ceramic prosthesis

Metal-ceramic is unpretentious, so caring for it will be the same as for your teeth. That is, you will need to brush your teeth twice a day, and also use an irrigator and dental floss. It is best not to use whitening or abrasive toothpastes, as these can damage the top ceramic layer.

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