These are the porcelain or composite plates replacing a vestibular (external) layer of teeth. They allow to correct violations of a form and color of tooth, and also protect teeth (for example, at playing wind instruments) as a result the restored tooth finds durability and does not differ from the others. Vinira are made according to a form, color of teeth of the patient and his wishes.
Vinira happen two types — composite and ceramic. Straight lines can make composite vinira (in the stomatologist's chair in one visit) and indirect in the ways (with participation of dental laboratory).
Ceramic vinira
Ceramic vinira produce by a laboratory method. At first the doctor prepares (grinds) tooth, then receives a print of teeth which goes to dental laboratory. After that on the prepared tooth it is fixed temporary vinir. The dental laboratory produces already constant vinir or method of stratification of ceramic powders (a classical method), or a casting method under pressure (press ceramics) at this time, or a milling method from integral blocks, for example lithium of the disilicate block. Then the dental technician paints it with special paints, towards the color nearby of the standing teeth. After that constant vinir it is fixed on tooth by a special composite.
Laboratory production of vinir is used if are going to improve a significant amount of teeth. Big durability and durability is inherent in ceramic vinira, on such vinira it is possible to recreate all features of concrete tooth. Also the fact that ceramic vinira do not change the initial color unlike composite vinir eventually is important.
Composite vinira
To establish composite vinir, the doctor grinds off a thin layer of enamel, further, using adhesive systems, layer composite sealing material. Such vinira in an oral cavity are made and serve from 3 to 5 years. More often such vinira apply if you want to improve one or two teeth from a general series. And also they are made by a laboratory method: after removal of a print receive model, then model vinir and further will polymerize it in special polymerization furnaces. In clinic vinir fix on a zhidkotekuchy composite. Advantage of this method, in comparison with direct vinira, is fuller polymerization of a composite and, as a result, its strengthened durability.
Lyuminira
Alternative esthetic technology from the Cerinate® company (USA) - the thinnest ceramic vinira which are fixed on the frontal surface of tooth without its preliminary grinding. Thickness of a lyuminir — 0,3 mm, due to the lack of turning teeth slightly increase in volume. On durability do not concede to usual ceramic vinira. It is not recommended to apply at an enamel diskoloration as thickness of a vinir is not enough for concealment of defect of color of a crown.