FAQs on Take Home Teeth Whitening Trays

Custom take-home whitening trays sit between drugstore strips and in-office whitening: stronger gel than strips, a tray moulded to your own teeth, and results over one to two weeks. The tray is the point. Because it is made from an impression of your teeth, the gel stays on the enamel and off the gums, which is where most of the evenness and comfort comes from.

Reviewed by Dr. Lance Kamel, DDS · Luxe & Kamel Dentistry, Plantation, FL

What take-home whitening trays are

Your dentist takes an impression or digital scan of your teeth and a laboratory makes thin, flexible trays that fit them precisely. You are given professional-strength whitening gel and instructions on how much to use and how long to wear them.

The trays are reusable. Once you have them, future top-up courses only require more gel, which makes maintenance considerably cheaper than repeating a full treatment.

How they work, and how long they take

The gel contains hydrogen peroxide or carbamide peroxide. It penetrates enamel and breaks down the pigmented molecules that have accumulated inside the tooth over years of coffee, tea, red wine, tobacco and ordinary ageing. The colour is removed rather than covered.

Most people wear the trays daily for one to two weeks. Wear time per session depends on the gel strength — some formulations are designed for 30 to 60 minutes, others for overnight. Follow the specific instructions you are given rather than a general rule, because the two are not interchangeable.

Results usually become visible within the first few days, with the full change apparent by the end of the course.

Custom trays, strips or in-office whitening

Trays are usually the best value over time, precisely because of that last row. Many people combine approaches — an in-office session for a fast initial change, then trays to maintain it.

Using them properly

1. Brush and floss first so the gel contacts clean enamel.
2. Use only the amount of gel you were shown — usually a small dot per tooth on the front surface. More gel does not whiten faster; it overflows onto the gums and irritates them.
3. Seat the tray and wipe away any excess that squeezes out along the gumline.
4. Wear for the time specified, no longer.
5. Rinse the trays in cool water after use and store them dry in their case. Never use hot water, which warps them.
6. Avoid staining foods and drinks during the course, when teeth are most absorbent.

Sensitivity, and how to manage it

Some sensitivity during a whitening course is common and usually temporary. It tends to appear as short, sharp twinges with cold rather than constant ache, and it typically settles within a few days of finishing.

Practical steps: use a sensitivity toothpaste for a week or two before starting and throughout, shorten each session, skip a day when needed, and ask about a lower-concentration gel. The advantage of professional trays is precisely that these variables can be adjusted — with strips they are fixed.

Sensitivity that is severe or lingering is worth a call. It occasionally points to something that should be examined rather than whitened over.

What whitening will not fix

Existing dental work does not change colour. Crowns, veneers, bonding and tooth-coloured fillings keep their original shade. If you have any of these on front teeth, whitening the natural teeth around them can create a mismatch — which is why the right sequence is to whiten first, then match new veneers or bonding to the final shade.

Whitening also works poorly on greyish tetracycline staining, on fluorosis, and on a single tooth darkened by past trauma. That last one in particular deserves examination rather than repeated whitening attempts.

And it does nothing for surface staining held in tartar — that comes off with a professional cleaning, which is why a cleaning before whitening gives a better and more even result.

Making the results last

Expect results to hold somewhere between several months and a couple of years, depending heavily on your habits. Coffee, tea, red wine, dark sodas and tobacco are the main drivers of relapse.

Rinsing with water after staining drinks, keeping up regular cleanings, and running a short top-up course with your existing trays once or twice a year are enough for most people to maintain the shade indefinitely.

Whitening trays in Plantation

If drugstore strips have not given you the result you wanted, or gave you sensitivity, custom trays address both of those specific failure modes. Dr. Lance Kamel can tell you first whether your discolouration is the type that whitening will actually change. See our teeth whitening page, or start with our new patient visit.

Frequently asked questions

Related reading

• Are whitening strips safe?
• How long does dental bonding last?
• Mouthwash: before or after brushing?

Sources

• ADA MouthHealthy — Whitening

This page is general education, not personal dental advice. Have decay and gum disease treated before whitening, and follow the instructions supplied with your gel.

Other Dental Offices in Nearby Cities

If you happen to be visiting nearby cities and need quality dental care, there are a few reputable options to consider.

• • Luxe Dental – Dentist in Lauderhill

• • Beach Smile – Dentist in North Miami

• • Family Dentistry Naples – Dentist in Naples

• • Family Cosmetic Dentistry – Dentist in Weston

• • Tooth Fairy Workshop – Dentist in Hollywood

• • All Smiles Dentistry – Dentist in Miami Gardens

• • Sedation Dental Spa – Dentist in Miramar

• • Miami Dental Group

• • BDC Dental Care – Dentist in Brickell

• • All Dental Group – Dentist in Miami Lakes

• • Dental Boost – Dentist in Hialeah

Each of these clinics has been well-reviewed by locals and may serve as reliable alternatives when you’re out of town.

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