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Главная  -  Протезирование  -  Inlay gives a tooth a «second life»

Inlay gives a tooth a «second life»

Inlays are constructions which are used for the renewal of the crown's part of a tooth at its destruction for more than on the third.
With inlay the maintainance of endodontium (nerve) becomes possible. A blameless aesthetic     appearance  has the tooth restored by inlay. An inlay allows to recover an anatomic form and durability of the blasted tooth.
Unlike filling, inlays are not added to shrinkage and do not change the color. The use of inlays practically fully eliminates the possibility of origin of the secondary decay. Insets are extraordinarily durable, as made from a technical photopolymer on the high temperature 900 C.

Why are stoppings unperfect?

With considerable destructions of the crown's part of teeth their restoration by stoppings  is not the best decision. When a tooth is blasted by caries and  there are only walls from it, it is just the case to put stoppings. And there is no need to cover by crown - a tooth is alive.Inlays help to decide the problem functionally and aesthetically.

The modern composite stoppings during polymerization them by lamp give shrinkage. It means that during a hot-setting, stopping grows short in a volume from 0,8% to 5%, and there is already enough of it for appearance of microspace between stopping and fabrics of a tooth, where the secondary decay appears in future.  Shrinkage conduces to appearance of internal deformations in stopping, which break away the thin walls of a tooth as a result. It is needed to say about the incomplete polymerization of stopping.
The point is that under the action of light stopping is polymerized only on 60-70% in the mouth, and durability of stopping and stability of color suffer from it.

For a stomatologist during the setup of stopping it is difficult to recover the anatomy of a tooth. To imitate tubercles and fissures (deepenings) properly,the  doctor needs some ability, skills and 2-3 hours.

Not all can afford such luxury, therefore often the flat stoppings appear in the cavity of a mouth.

What is the danger?
Teeth will valuably chew only  when there is a contact  between hills and fissures of opposite teeth.

Correct fissures-tubercular contact between teeth.   
If stopping is flat, masticatory efficiency of such tooth is mionectic. If there are ten such stoppings, efficiency of mastication goes down on 30-50%. Such stoppings crumple, press food, but do not grind it. Masseters suffer hereupon, there is some deformation in joints which are responsible for motion of a lower jaw and mastication. The pathological effaced of teeth appears - teeth lose a former height and durability. A smile becomes «older».

To solve the problem functionally and aesthetically  inlay is used.
Unlike the composite stoppings, inlays are made not in the mouth of a patient, but in the conditions of a dental laboratory.

Designing an inlay, a technician is unreserved by space, tongue, cheeks, saliva of a patient. A gipseous model copies absolutely exactly the situation in a mouth cavity. A technician sees a tooth in all planes, imitates masticatory motions, and it is a mortgage of valuable harmony of inlat in the cavity of a mouth. An inlay exactly reproduces a fissurnes-tubercular contact between the teeth of the overhead and a lower jaw.The color of inlay is chosen in accordance to the color of teeth of a patient, here is possibility to recreate fully the individual features of a tooth of a patient by the special paints.
 Inlays are also used  as supporting elements of a prosthetic bridge.


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