Teeth Whitening

/ What is teeth whitening?

Whitening is a process that chemically breaks down the colour molecules lodged in the hard tissue of a tooth. The gels are usually based on hydrogen peroxide, or on its slower-releasing form, carbamide peroxide. These agents pass into the microscopic pores of the enamel and lift the stains that build up over the years.

One distinction matters: whitening does not strip, grind or thin the tooth. Its structure is preserved; only the shade is lightened. That is why, when done with a dentist, it produces a visible result without harming enamel health.

/ Why do teeth yellow over time?

Discolouration has two main sources. The first is surface staining: coffee, black tea, red wine, dark spices and tobacco gradually leave a coloured film on the enamel. These extrinsic stains respond best to whitening.

The second comes from within the tooth. As we age the enamel naturally thins and the yellowish dentin beneath shows through more. Certain antibiotics taken in childhood, excess fluoride or an old trauma can also colour a tooth from the inside. These cases call for a little patience and a tailored plan.

/ How is in-office whitening performed?

In-office whitening gives the fastest result because it is done under supervision with high-efficacy gels. First the gums are covered with a thin protective barrier so the gel only touches the tooth. The whitening gel is then applied, and in some systems a special light or laser speeds up its action.

A single session usually lasts thirty to sixty minutes. Most people see a clear lift after the very first visit. Depending on the degree of staining, your dentist may suggest one or several sessions.

/ Treatment Process

1. 01Preparation: Gum protection and mineralisation.
2. 02Application: Clinical whitening gel and activation.
3. 03Aftercare: Post-treatment maintenance protocol.

/ At-home whitening and custom trays

For at-home whitening an impression of your teeth is taken and a thin, clear custom tray is made. You place a low-concentration gel in the tray and use it at home for a period your dentist sets. The result arrives more gradually than in-office whitening but looks very natural.

Why is a custom tray better than off-the-shelf strips? Because it fits your teeth exactly, keeps the gel off the gums and holds the dose under control. That means a more even brightness and less sensitivity.

/ How long does whitening last?

The longevity of whitening cannot be fixed to a single number because it depends directly on your habits. In someone who loves coffee, tea and cigarettes the result fades faster, while it holds far longer in someone who avoids them. In general the effect ranges from a few months to a few years.

The good news is that whitening is not a one-time event but a maintainable one. When the shade drifts over time, a short top-up session or a few days of home use easily refreshes your smile.

/ Sensitivity and safety

After whitening some people feel a temporary sensitivity to cold. This comes from the gel leaving the enamel pores more permeable for a while, and it usually settles on its own within a few days. Gels containing potassium nitrate or fluoride noticeably reduce this sensitivity.

Whitening done under a dentist does not damage enamel. What is risky are internet products of unknown strength or uncontrolled application. Applied at the right dose, for the right time and with the gums protected, whitening is a safe procedure.

/ Who is whitening not recommended for?

Whitening is not right for every mouth at every time. It is postponed during pregnancy and breastfeeding. In people under eighteen it is usually not advised because tooth development is not complete. If there is active decay or gum inflammation, those problems are treated first.

One point is especially important: fillings, crowns and porcelain do not whiten. If you have such restorations in the front, a colour mismatch with the natural teeth may appear after whitening. In that case your dentist will explain the right sequence and plan for you.

/ Aftercare and the white diet

The first forty-eight hours after the procedure are the most critical, because the enamel pores stay open a little longer and are sensitive to coloured foods. Staying away from coffee, tea, red wine, dark drinks, staining sauces and tobacco during this window meaningfully extends the result.

In the long run the formula is simple. Brushing twice a day, cleaning between the teeth and a check-up every six months are the most reliable way to protect what whitening gave you.