A brighter smile is one of the most requested cosmetic dental treatments in Canada. Whether your teeth have been stained by coffee, tea, wine, or simply the passage of time, teeth whitening can make a noticeable difference in your appearance and confidence. But with so many options available — from drugstore strips to professional in-office treatments — how do you know which is right for you?
Why Do Teeth Become Discoloured?
Tooth discolouration falls into two categories. Extrinsic staining affects the outer enamel surface and is caused by foods, drinks, and tobacco. Coffee, red wine, tea, and berries are common culprits. Intrinsic discolouration occurs within the tooth structure and can result from aging, certain medications like tetracycline, excessive fluoride during childhood, or trauma. Understanding the type of staining you have helps determine which whitening approach will give you the best results.
Over-the-Counter Options
Drugstore whitening products are the most accessible and affordable option. Whitening toothpastes use mild abrasives and low concentrations of peroxide to remove surface stains, typically costing $5 to $15. Whitening strips — the most popular OTC option — contain a thin layer of hydrogen peroxide and cost $30 to $70 per kit. They can lighten teeth by a few shades over one to two weeks. While convenient, OTC products use lower-concentration bleaching agents and may cause uneven results or gum irritation if not applied carefully.
Take-Home Kits From Your Dentist
Custom take-home whitening kits from your dental office offer a middle ground between drugstore products and in-office treatments. Your dentist creates custom-fitted trays from impressions of your teeth, ensuring even coverage and minimizing gum contact. The professional-grade gel is stronger than OTC products but used in controlled doses. Kits typically cost $300 to $600 in Canada and deliver noticeably better results than store-bought options, with full results visible after one to two weeks of daily use.
In-Office Professional Whitening
Professional in-office whitening delivers the most dramatic results in the shortest time. Treatments like Zoom, Philips, or BriteSmile use high-concentration bleaching agents activated by special lights or lasers. A single session takes about 60 to 90 minutes and can lighten teeth by several shades. Costs range from $400 to $1,000 depending on the system used and your dentist’s location. This is the best option if you want fast, significant results for a special event or simply prefer professional supervision.
How Long Do Results Last?
Whitening results aren’t permanent, but with proper care they can last one to three years. Longevity depends largely on your habits — patients who continue drinking coffee, tea, or red wine without rinsing afterward will see stains return faster. Using a whitening toothpaste for maintenance, avoiding tobacco, and scheduling periodic touch-up treatments help extend your results. Your dentist can recommend the best maintenance routine based on your specific situation.
Is Teeth Whitening Safe?
When used as directed, teeth whitening is considered safe by the Canadian Dental Association. The most common side effects are temporary tooth sensitivity and mild gum irritation, both of which typically resolve within a few days of completing treatment. Professional supervision reduces risks significantly — your dentist will assess whether whitening is appropriate for your teeth, protect your gums during treatment, and recommend products that minimize sensitivity.
Who Shouldn’t Whiten?
Whitening isn’t suitable for everyone. It doesn’t change the colour of dental restorations like crowns, veneers, or fillings, which can lead to uneven colouring. Patients with severe enamel erosion, untreated cavities, or active gum disease should address those issues first. Children under 16 and pregnant or nursing women are generally advised to avoid bleaching treatments. Your dentist can evaluate your specific situation and suggest alternatives if whitening isn’t the right fit.
Find a Whitening Provider Near You
Ready to brighten your smile? Browse dental professionals offering cosmetic services in your area on Smile Directory. Compare providers, check their services, and book a consultation to find the whitening option that’s right for your teeth, your timeline, and your budget.