Ceramic and composite veneers, what is the difference, before and after the restoration, features of the choice and operation

If there are chips with the taste of bacon, plastic panels under the tree, false nails with a pearl design, what is worse than false teeth for pearls.

What is a veneer?The best answer is to follow Kozma Prutkov: "Look at the root!"

Veneer( eng.) - veneer, lining, surface layer.Veneer of culture is the visibility of culture( alas, it concerns many).When this word refers to dentistry, it means simply a thin lining of the tooth.Hence the different technologies for creating such a surface.

Hollywood veneers

If all the teeth are healthy and the person is not satisfied with just the color or shape, then the best solution is not to do anything with them except disinfection, and try to correct the appearance using only the thin lining, which in this caseAre called Hollywood veneers.For example, if two large central teeth stand out in size from others, then instead of squeezing them and reducing them, it is enough simply to increase the overlays of a pair of adjacent teeth left and right.

In the photo before the procedure and after the correction it is clear that striking changes are sometimes achieved by very modest means: color change and minor corrections in the form.To avoid a horse's shade of a smile, Hollywood veneers make as thin as 0.3mm as thin as possible, and to distinguish them from the usual group, brand names such as lumineers, verniram ultranaries and the like are invented.

Teeth defects that are easily eliminated by Hollywood veneers:

• incorrect tooth shape;
• unsatisfactory color;
• visible seal, traces of restoration;
• abrasion of the enamel;
• chips and cracks;
• gaps between the teeth( front or side).

Lumineers - thin ceramic overhead plates make individually, by exact casts of teeth.They have great strength, hardness, they have a beautiful appearance, they have transparency like enamel of a tooth.Longevity and aesthetic qualities of ceramic lumineers justify their rather high cost.On the American site www.lumineers.com, the price of lumineers for one tooth is indicated from 800 to 2000.

The cost of such Cerinate ceramics( USA) in Russia is indicated: from 35,000 to 50,000 rubles.The discounts are explained by well-established connections with the manufacturer.Such a high cost is associated not only with the absence in Russia of its high-tech production, but also with very good statistics of use, and even looks so beautiful and very expensive.

Composite veneers

Teeth covers made in the laboratory by impression are called indirect veneers, composite or ceramic.Due to the high temperature required for ceramics, such veneers are only indirect.

Composite veneers can be made directly in the mouth, on the teeth, with enamelled 0,3-0,7 mm.The prepared tooth is etched with a special gel and an adhesive layer is applied, binding the enamel and the dentin to subsequent layers of the composite material.Each layer polymerizes under the influence of light of a certain wavelength, and for some photopolymers the reverse process is possible: if it is irradiated with light at a higher frequency, then the depolymerized material can be washed off with a solvent.

After the color is selected and the desired shape of the tooth is formed, it is processed with milling cutters, polished and polished.The whole procedure can take place in one session - this, along with a relatively low cost, is the main plus of direct( directly on the spot) composite veneer.

The list of disadvantages of such a restoration layer is much longer:

• composite veneers are noticeably inferior to ceramic in strength;
• possible color change caused by vegetable dyes;
• with time, the border of restoration with composite veneer may appear;
• low service life: every 5 years it is necessary to repeat the procedure.

With a large number of problem teeth, the procedure is delayed and even a lower cost does not justify a direct method.

The shiny surface of composite veneers comparatively quickly loses its smoothness and requires re-polishing.

Indirect composite veneers are manufactured in the same way as ceramic in vitro, and their strength can be higher than those made on site.Strength and aesthetic properties of composite materials depend on the size of the particles included in its composition, and the change in the size of the grains causes contradictory property changes.

Some features of

Composites When the particle size is about 30 μm, the material is obtained with maximum strength, but with the worst aesthetic content: it can not be polished and quickly fades.When the particle size is 3 orders of magnitude smaller( from 0.04 μm), everything happens exactly and vice versa - an excellent polished, color-stable surface has insufficient strength , suitable only for sealing.We have to choose not quite a golden mean - hybrid composites with particles up to 2 μm.

In addition, direct composite veneers require a lot of experience and skill from the doctor: to make the desired shape of the tooth and choose the color - it's easy for the sculptor, but not for every doctor.

Conventional contraindications also apply to the installation of composite veneers:

• thinned enamel;
• straight bite;
• gnashing his teeth as a steady habit;
• mobile teeth;
• tooth decay and inflammation before curing.

The cost of composite veneers, depending on the clinic and the complexity of the procedure from 2500 to 15000 rubles.In most conventional middle-level clinics, the spread of prices is much less: direct veneers from 4 to 6 thousand rubles.But in the composite, even under the ceramic veneer, in 5 years defects of can be detected, that is, it is the maximum service life of such material.

Ceramic veneers

Hollywood veneers, as the most gentle option, are of course the most preferable, but it is not always possible to do without turning the enamel.This procedure is not as simple as it might seem: all edge points, especially in the gums, require almost a jewelery accuracy of and good modern tools.From the thoroughness of the turning and subsequent processing of teeth, the life of ceramic veneers depends, that is, everything on the conscience of a particular doctor.

Reliable statistics, as far as this lucky average Russian patient is unlikely to exist.In other countries, where the discipline for performing such procedures does not cause such doubts, conducts sample surveys of patients.Thus, in Belgium ceramic veneers were tested after 5 and 10 years of operation.

As a result, it became clear that after 5 years of using veneers, the likelihood of negative effects increases significantly: secondary caries, permeability of the adhesive and other easily removable defects.In some cases, serious shortcomings in the performance of clinical procedures were indicated as a cause.(This is in Belgium!).After 10 years of operation, only 4% of ceramic veneers were in perfect condition.Most of the defects found were easily eliminated.

The relationship of Russian doctors and patients is incomparably different from European and American orders.The responsibility of our dentists to a gangster or an official can be incommensurably higher than that of an ordinary patient, even in the case of a trial.In addition, some of them came to this profession only because of the opportunity to make good money without looking back on their abilities.

Despite this, good doctors do exist, they should be searched for, having decided on an expensive procedure with veneers.Only a conscientious doctor can justify the high price of beautiful smiles.Ceramic veneers on carefully prepared teeth will last for many years , but nevertheless periodic inspection should become an obligatory procedure, as well as personal hygiene.