The industry of modern dentistry does not stand still. To date, there are a large number of options for prosthetics. Many of them can be a decent replacement for teeth, both in physiological properties and in terms of aesthetics. Outside of any competition in matching the size of the teeth and precision manufacturing are zirconium crowns.
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Zirconia crowns
These are heavy-duty dental structures that are manufactured using high-tech modern equipment and can be applied to the front and side chewing teeth.
Zirconia is the material that today considered one of the highest quality. It is possible to make from it not only single crowns, but also bridges.
Zirconia crowns consist of two layers:
- The inner layer (high strength frame) is made of zirconium dioxide.
- Outside - porcelain mass, sintered on the basis of the frame.
On the strength of such a frame quite a bit inferior to metal basewhile possessing the ability to transmit the light necessary to achieve translucency, which is characteristic of natural tooth enamel. In turn, prostheses made of metal ceramics do not have such translucency, since their inner frame is metal and does not let the light in at all. This affects aesthetics.
The advantages of zirconia crowns
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Crowns convey transparency and shades of natural tooth enamel. - Over time, ceramics does not change, that is, it does not lose luster, does not tarnish and does not darken.
- Zirconium teeth are very reliable and have a long service life. The design of this material has high strength. And thanks to the CAD / CAM technology used for the manufacture of prostheses, they achieve a high accuracy of their fit and fit to the ground teeth. This reduces the possibility of caries on the border of the tooth with the crown and the ingress of saliva and microorganisms under the crown.
- Constructions from this material are hypoallergenic.
- They are absolutely safe for gum and the body as a whole.
- Strong turning of teeth under them is not required.
- On the border of the gums with a crown there is no gray staining.
Since zirconium dioxide is an incredibly durable material, the durability of structures made from it is unlimited.
Have zirconia crowns the only problem - high price. This is explained by the complexity of the technological process, which requires appropriate technical equipment, and the high cost of consumables. However, in return, the patient receives aesthetics and the highest quality.
Contraindications
- Malocclusion
- The weakness of the patient after his illness.
- Mental disorders.
- Pregnancy.
- The presence of inflammatory processes in the oral cavity.
Making zirconia crowns
Designs are made using CAD / CAM technology .
Manufacturing steps
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A three-dimensional model of future crowns is loaded into a computer milling machine and a structural frame is made. - To give strength to the dental structure, it is burned in a furnace.
- Porcelain mass is applied to the fabricated frame in layers. Each of the layers is sintered in a furnace.
- On the last layer, before firing, a special coloring composition is applied, which gives the crowns the desired shade.
Since the process of making zirconia crowns is fully automated, possible errors are excluded.
Installation of crowns
- First of all, the dentist prepares the patient's supporting teeth: replaces old fillings, treats caries, seals root canals.
- Further, the thickness of the future crowns, abutment teeth are ground and scanned in a special computer program. Scanning is necessary in order to create a three-dimensional model of future crowns.
- Selected shade designs.
- Temporary plastic crowns are made and installed.
After zirconium constructions are manufactured, their try on and fix. At the discretion of the physician, the fixation may be temporary or permanent.
Patients, after installing structures made of zirconium, may have complaints about the feeling of discomfort and the increased sensitivity of grinded teeth. In these cases it is necessary:
- Be sure to follow all the recommendations of the oral care physician and the installed design.
- For some time do not eat solid food.
- Patients suffering from bruxism should use night kappa.
Necessary care
Twice a day teeth should brush with toothpaste.
It is desirable to rinse the oral cavity with water after each meal.
Dental intervals clean of food debris flossing (flossom).
It is not recommended to crush hard objects, such as seeds, nuts, ice and others.
Visit the doctor for a routine examination should be twice a year.
According to reviews of a large number of patients, zirconia crowns are an excellent option for prosthetics.
Reviews
“In September I came to the clinic for a consultation, which lasted about an hour. Everything was accessible and explained to me in detail, told about the possibilities, showed a photo, advised how to save. My goal was to replace four teeth, three of which were already "dead." At the consultation, the doctor made a plan for my treatment, where he wrote everything in stages and in detail. Just at that time, an action took place in the clinic, which I took advantage of. In total, the treatment and installation of zirconia crowns took two months. Now my teeth look natural and beautiful. I am happy with the result.
“Just yesterday, the installation of the crowns was over, so I want to write a review. I did all my teeth, half of which were live, but their appearance did not suit me. Now everything is just super! Zirconia crowns - this is the best there is now. These are the teeth you see in the powerful. They look absolutely aesthetically pleasing, they let in light and do not differ from natural ones. The doctor promised that with proper maintenance, they will serve me for twenty years. You can not nibble nuts and seeds, open the lids and corks with your teeth and so on. I agree to eat only soup for the sake of such a smile.
“Zirconia is no better than cermet in terms of aesthetics. The operation can also be about ten years old, and it can slip apart in a few months. Here is a matter of chance and luck.
“No one represents how afraid I am of dentists! But the doctor, whom my sister recommended to me, delivered me from this phobia and instilled confidence. He put me zirconia crowns, which look very nice - I can not see enough of them.
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