In-office teeth whitening at Lambton Dental
In-office whitening lifts the shade of your natural teeth in a single appointment, using a professional-strength gel applied by our team at Lambton Dental in West Toronto. Every visit starts with an exam and a written quote so you know the plan before we begin.
What in-office whitening is
In-office whitening is a professional bleaching treatment that uses a higher-concentration peroxide gel than the kits sold at pharmacies. The gel is applied to the front surfaces of your teeth after your gums and lips are carefully isolated, and it is left on for several timed intervals during one appointment.
Because the treatment is supervised by the dentist, we can choose a gel strength that suits your enamel, protect sensitive areas ahead of time and stop early if you feel any discomfort. Whitening only affects natural tooth structure; existing crowns, veneers, bonding and fillings do not lighten, so we always review those with you first.
When in-office whitening is a good fit
You may be a good candidate when:
- Your teeth have yellowed gradually from coffee, tea, red wine, tobacco or age and you would like a noticeable lift in one visit.
- You have an event on the calendar and prefer a controlled, dentist-supervised session over several weeks of at-home trays.
- You have already had a recent professional cleaning and a healthy exam.
- You do not have untreated cavities, active gum inflammation or leaking fillings on your front teeth.
If you have front-tooth restorations that will not lighten, deep staining from medication, or heavy sensitivity, we may recommend take-home whitening, a combination approach, or a longer-term option such as porcelain veneers or cosmetic bonding. We explain the trade-offs before anything begins.
What to expect at your whitening visit
Exam and shade review
The dentist checks your teeth, gums and any existing restorations, records your starting shade using a standard shade guide in good light and confirms in writing that in-office whitening is suitable.
Cleaning and preparation
Surface stains are polished away and the gums, lips and cheeks are carefully isolated with a protective barrier so the gel only touches enamel.
Gel application
A professional-strength whitening gel is applied to the front teeth for several timed intervals during the appointment, with checks between rounds.
Comfort checks
We ask about sensitivity as we go and stop early or reduce a round if you feel any discomfort; a desensitising product can be applied at the end.
Final shade check and take-home care
You review the result in a hand mirror against the starting shade, and we go over what to eat, drink and avoid over the next 24 to 48 hours to help the result settle.
Nitrous oxide, oral sedation and IV sedation are available for anxious patients; the dentist reviews your health history first. See our sedation options page for more.
Keeping your whiter smile after treatment
Mild tooth or gum sensitivity for a day or two is common after a whitening session and usually settles on its own; a sensitivity toothpaste can help if needed. For the first 24 to 48 hours the enamel is more porous, so we ask you to avoid strongly staining foods and drinks such as coffee, tea, red wine, curry, berries and tobacco during that window.
To keep the result looking fresh, we recommend regular professional cleanings, brushing twice a day, and rinsing with water after coffee or wine. Many patients like to keep a set of custom take-home trays for occasional short top-up sessions between in-office visits — we discuss whether that fits your schedule and shade goals during the exam.
If you have chosen a combined plan — an in-office session plus a set of take-home trays — we schedule the take-home phase a couple of weeks after the in-office visit, once any early sensitivity has settled, so the two treatments work together and the final shade is stable.
Cost, insurance, and CDCP / IFHP coverage
The cost of in-office whitening depends on the number of rounds needed and whether a take-home top-up is included. We provide a written estimate before treatment begins, so there are no surprises on the day.
Professional teeth whitening is generally considered a cosmetic service, so most private insurance plans, the Canadian Dental Care Plan (CDCP) and the Interim Federal Health Program (IFHP) do not cover it. Where a related service is included (for example, a cleaning done at the same visit), we direct-bill the eligible portion. Our payment options page explains billing openly for anyone paying out of pocket.
For patients paying out of pocket, we discuss whether a single in-office round, a combined in-office plus take-home plan, or a take-home-only approach fits both the timeline and the budget.
For patients choosing a combined plan, we can take impressions for take-home trays at the same visit as the in-office session, which usually keeps the overall fee lower than booking the two services on separate visits. The written estimate lays out each component so you can adjust the plan without needing a new quote.
For larger treatment plans, monthly payment plans through a third-party financing partner are available on approved credit — ask at your consultation or see our payment options.
Why patients choose Lambton Dental for whitening
- Every whitening visit starts with a short exam so the dentist can confirm the treatment is suitable and flag any restorations that will not lighten.
- We use professional-strength gel with careful gum isolation and pause between rounds to check comfort, rather than a single unmonitored application.
- Written quotes are provided before treatment, and any recommended cleaning or repair work is discussed separately.
- We direct-bill CDCP, IFHP and major insurance carriers wherever your plan allows, even when whitening itself is not covered.
- Evening and weekend appointments make it easier to fit a whitening visit around your work schedule.
- Our team serves patients in English, French, Italian, Spanish, Portuguese, Hindi, Punjabi, Urdu, Tagalog, Vietnamese, Ukrainian, Mandarin and Cantonese.
Related services
Frequently asked questions about in-office whitening
How many shades will my teeth lighten?
It varies by starting shade, the type of staining and how your enamel responds. Most patients see a noticeable, several-shade change in one visit; we record your shade before and after so you can see the difference on the guide.
Will whitening damage my enamel?
Professionally applied whitening gel has been well studied and, when supervised by a dentist with proper gum isolation, is not shown to weaken enamel. We check for existing wear, cracks or exposed roots first, and adjust or postpone if the gel is not appropriate for your teeth.
Will my crowns, veneers or fillings whiten too?
No — whitening only affects natural tooth structure. If you have front-tooth restorations, we discuss shade matching and whether replacing a restoration might be needed after whitening so everything blends. Any restorations that will be visible in the final smile line are noted in your written plan so shade decisions are made with them in view.
Is whitening safe during pregnancy or breastfeeding?
There is limited research, so we usually recommend postponing elective whitening until after pregnancy and breastfeeding. Cleaning and any needed dental care can still be done during that time. We can still take shade photos and start planning during that time so treatment is ready when you are, and cleaning and any needed dental care can still be done as usual.
How long will the result last?
That depends on your habits — coffee, tea, red wine and tobacco all shorten the effect. Many patients keep the result looking fresh for a year or more with regular cleanings and occasional short take-home top-ups. We record before-and-after shades at each visit so any change is visible on the guide and easy to track between reviews.
Book a whitening consultation
Book online or call (416) 666-3700 to arrange a short whitening assessment. The dentist will examine your teeth, check your existing restorations and provide a written estimate before any whitening is booked.
CDCP welcome
We welcome patients covered under the Canadian Dental Care Plan and can help you understand what's covered.
Learn about CDCP →IFHP welcome
We are registered to treat patients under the Interim Federal Health Program and bill Medavie Blue Cross directly.
Learn about IFHP →Direct billing
We bill all major Canadian dental insurance carriers directly, so you pay only what your plan does not cover.
How direct billing works →