Zoom Teeth Whitening in Ukraine

Zoom is an in-office whitening system from Philips that combines two things: a gel with a high concentration of hydrogen peroxide and a blue-light lamp that speeds up its breakdown. The gel is applied to the dried enamel of the front teeth in cycles of 15 minutes; between cycles the residue is removed and a fresh portion is applied.

Whitening happens inside the tooth, not on its surface. Peroxide breaks down into reactive oxygen species, which pass through the enamel into the dentine and break the double bonds of chromogens, large pigment molecules that have accumulated there over the years. These molecules break into smaller colourless fragments, and the tooth becomes lighter without any layer being removed.

The indications are straightforward: age-related darkening, when the enamel thins and the yellowish dentine shows through more strongly; staining from coffee, black tea, red wine and tobacco; evening out the shade before prosthetic work on the front teeth. Warm yellowish teeth respond best, while grey shades lighten more slowly and need a longer at-home course.

The procedure is not done, or is postponed, for children and teenagers under 18, pregnant and breastfeeding women, and people allergic to peroxide. It is also postponed if there is active caries, leaking margins of old fillings, enamel cracks, exposed tooth necks and wedge-shaped defects, gum inflammation and erosion caused by reflux: the cause is treated first. People with many fillings and crowns in the smile zone are a special case: for them the procedure changes the colour of their own tissues only and makes the difference from the restorations more noticeable.

MediUkraine is a treatment search and coordination service, not a clinic. We select the clinic and the dentist, arrange the visit dates and support you throughout, including if you are travelling from abroad. Whether whitening is appropriate, and which protocol to use, is decided by the dentist after an examination.

The method is based on hydrogen peroxide. In-office gels contain a high concentration, around 25%, while at-home gels contain several times less, and concentration together with contact time determines how fast the reaction proceeds. Peroxide breaks down into reactive oxygen species, which pass through the enamel prisms into the dentine and break the double bonds of chromogens, large pigment molecules that absorb light. The breakdown products are colourless and smaller, so the tissue becomes lighter without any layer being ground away.

The in-office visit is built around cycles. The gel is applied in a layer of about 1 mm to the outer surface of the front teeth, usually from the sixth tooth on one side to the sixth on the other, counting from the midline, that is, the area visible when smiling; it is left for 15 minutes under the lamp, then removed with suction and a fresh portion is applied. The standard protocol is three cycles; where indicated the dentist adds a fourth or, conversely, stops at two if there is pain.

It is worth being realistic about the lamp's role. Blue light speeds up the breakdown of peroxide and slightly warms the gel, so the reaction is more intense within the visit. At the same time, in clinical studies the difference between whitening with and without light activation at high gel concentrations after a week or two is often small or not statistically significant, whereas light noticeably increases sensitivity during the procedure. In practice, the result depends mainly on gel concentration, contact time and the number of cycles; the lamp adds to them but does not replace them.

Isolation is not a formality: it is what prevents a chemical burn. A liquid barrier is applied to the gums and cured with the lamp, the lips and cheeks are held back with a retractor, the mucosa is coated with a protective cream and the eyes are covered with glasses. If the barrier does not seal properly, the gel seeps underneath it and the gum turns white and starts to burn; it heals within a few days, but the visit has to be stopped.

The at-home version works more slowly and gently. Custom trays about 1 mm thick with reservoirs for the gel are made from impressions or a scan; you fill them with gel at home and wear them for 30 minutes to several hours, while gels with low-concentration carbamide peroxide are designed to be worn overnight. The course lasts 10 to 14 days. Concentrations here are several times lower, so the result builds up gradually, and sensitivity is usually milder than after an in-office visit.

The combined protocol uses both. The in-office visit gives a quick, visible improvement, and the at-home course after it consolidates and evens out the shade, working on areas that lighten more slowly: the zone near the gum line and the canines, which are almost always darker than the incisors. This scheme usually lasts longer than in-office treatment alone, and you keep the trays for future top-ups.

Now for the main question: how many shades. The result is measured on the Vita Classical shade guide arranged by brightness: it has 16 shades, from the lightest, B1, to the darkest, C4. In one in-office visit teeth usually become 3–6 shades lighter on this guide, and more with the combined protocol. The forecast depends on the starting colour: yellowish teeth in group A respond faster and more noticeably, grey shades in group C more slowly, and they almost always need an at-home course. No one can give an exact figure in advance; the dentist outlines the likely range after an examination and records the starting shade so that there is something to compare against.

Peroxide acts only on the natural tissues of the tooth. Composite fillings, veneers, crowns, ceramic onlays and the artificial teeth of dentures do not change colour: after the procedure they stay as they were and, against lightened teeth, begin to look darker or more yellow. This is not a side effect but an expected property of the materials, and the plan is drawn up in advance: first whitening, then a pause of at least two weeks, then replacement of the restorations to match the new shade. The pause is not a matter of convenience: residual oxygen in the surface layer of the enamel weakens the bond of the adhesive, and a filling placed immediately after the procedure holds less well.

Some types of discolouration respond poorly to whitening. Tetracycline staining, grey or purple bands in the dentine after taking the antibiotic in childhood, responds only to a long at-home course lasting several months, and even then only partly. Fluorosis and white chalky spots behave differently: during the course they may become more contrasting, because they lighten faster than the rest of the enamel, and the picture evens out only after the course ends, sometimes several weeks later. Persistent white spots are treated not with peroxide but with resin infiltration or microabrasion. A darkened root-filled tooth is a special case: it is whitened from the inside, with the agent placed in the tooth under a temporary filling; in-office gel will not help.

How long the result lasts depends on aftercare, not on the system. The effect usually lasts from one to two years, noticeably less in smokers and in people fond of coffee and red wine. It is maintained not by repeating the full course but by short sessions in the same trays: one or two nights every six months or once a year. The full in-office protocol is not done more than once a year, because repeated cycles with a high peroxide concentration serve no purpose when maintenance is enough.

The most important thing to know in advance: the colour you see in the mirror immediately after the visit is not final. During the procedure the enamel temporarily dries out, so it looks lighter and more opaque than it will actually be. Over the next day or two the tissue absorbs moisture and part of the visible effect fades; this is normal, not a loss of the result.

That is why the shade is assessed after two weeks, on the same guide and preferably in daylight rather than under the dental chair lamp. At the follow-up examination the dentist measures the shade again and compares it with the starting value in the record. Before and after photos should be taken under the same conditions: under different lighting and white balance the same tooth looks different.

Sensitivity is the most common reaction, and it is expected. Teeth respond with brief shooting twinges to cold, air and sweet things; the peak is on the first day, and it usually settles within one to three days. A toothpaste with potassium nitrate helps, as do the fluoride gel or varnish the dentist applies at the end of the visit, warm water instead of ice-cold, and a break from acidic drinks. If needed, take a painkiller as advised by the dentist.

The white diet applies for at least 48 hours. During this time the enamel lacks its usual protective film, the pellicle, and pigment attaches more easily than at any other time. Coffee, black tea, red wine, juices and drinks with colourings, beetroot, tomato and soy sauces, berries, turmeric and curry, chocolate are all off the menu, and so is smoking. Chicken, fish, rice, pasta, potatoes, cottage cheese, cauliflower and bananas are fine.

Replacement of fillings, veneers and crowns to match the new shade is planned no earlier than two weeks later. The reason is technical: after contact with peroxide, oxygen remains in the surface layer of the enamel for some time and weakens the bond of the adhesive, so a restoration placed immediately holds less well and more often develops staining at the margins.

Then maintenance begins. Deposits are removed professionally every six months, and the shade is refreshed with one or two nights in the trays roughly every six months or once a year, depending on how much coffee, tea and wine there is in your diet. For patients from abroad, MediUkraine provides the record with the documented shades and photos, so that your dentist at home can see the starting point and does not have to start the assessment from scratch.