The information on this page is for general educational purposes only.
Please consult your dentist for advice specific to your oral health.
Whitening teeth with hydrogen peroxide or carbamide peroxide breaks down stains inside the enamel. In Ontario, three options exist: in-office whitening, take-home custom trays, and over-the-counter products. Each delivers different results at different costs. This guide compares all three so Brampton patients can choose the right treatment. Delta Park Dental provides professional teeth whitening for patients across the GTA.
Key Takeaways
- Professional whitening can lighten teeth 5 to 8 shades in a single visit lasting 45 to 60 minutes
- In-office whitening uses prescription-strength gels with up to 10 times more peroxide than over-the-counter kits
- Results from professional whitening last 1 to 3 years with proper care; OTC strips last 6 to 12 months
- Whitening works only on natural teeth — it does not affect crowns, veneers, or fillings
- Professional teeth whitening typically costs $250 to $500; OTC kits range from $40 to $150
The Short Answer
In-office whitening delivers the fastest and most dramatic results — up to 8 shades lighter in one visit. Take-home custom trays with prescription-strength gel come second. Over the counter whitening products work for mild surface stains but cannot match professional whitening in strength, speed, or consistency. The condition that flips this: if you have sensitive teeth or significant tooth discoloration, professional supervision matters more than cost.
Side-by-Side Comparison
Most chemical whitening agents use hydrogen peroxide or carbamide peroxide to break down stains embedded in tooth enamel. The key difference between options is the concentration of bleaching agent, the delivery method, and whether a dental professional is involved.
Comparison Table
| Attribute | In-Office | Take-Home Trays | Over-the-Counter |
| Bleaching agent | Hydrogen peroxide 25–40% | Carbamide peroxide 10–20% | Hydrogen peroxide 3–10% |
| Application | Dentist applies; gum barrier placed | Custom fitted trays worn 1–2 hrs daily | Strips or tray per package |
| Time to results | One visit, 45–60 minutes | One to two weeks | Several weeks |
| Shades lighter | 5 to 8 | 3 to 6 | 1 to 3 |
| Cost | $250–$500 | $150–$500 | $40–$150 |
| Sensitivity risk | Managed by dentist | Moderate | Low to moderate |
| Longevity | 1–3 years | 1–2 years | 6–12 months |
| Best for | Deep stains; special occasions | Gradual whitening at home | Mild surface stains only |
Cost
Teeth whitening procedures vary in price across Ontario. Professional teeth whitening typically costs between $250 and $500 — the teeth whitening cost at a dental clinic. Coffee, red wine, and tobacco are the most common reasons patients seek treatment, as these stain teeth over time. Custom whitening trays cost between $150 and $500 depending on the prescription-strength gel included. Prescription bleaching gel alone costs $20 to $40 per portion for refills. Over-the-counter whitening kits are available at pharmacies for $40 to $150.
Option A — In-Office Whitening in Detail
In office whitening applies a high-concentration professional grade gel — a whitening gel typically at 25 to 40% hydrogen peroxide, a higher concentration than any over the counter product. This teeth whitening treatment is the strongest option available at a dentist’s office. A blue LED light or laser activates the bleaching agent and accelerates the reaction. Philips Zoom is one of the most widely used in-office systems and can lighten teeth up to 8 shades in a single appointment. A protective barrier is placed on the gums and around the mouth before gel application to prevent gum irritation. Patients are asked to rinse after treatment to clear remaining gel.
The Caveat Most People Miss
Whitening treatments are effective only on natural teeth — existing dental work like crowns, veneers, and fillings will not change colour, which can create a visible mismatch if done after cosmetic work.
Option B — Take-Home Custom Trays in Detail
Custom trays are fabricated from impressions taken at the dental clinic and filled with a prescription carbamide peroxide gel at a lower concentration than in-office gel. Worn one to two hours daily for one to two weeks, they produce gradual, even results that many patients prefer for long-term maintenance. The trays are reusable — refill gel is the only ongoing cost.
Time and Effort
In-office whitening requires one appointment of 45 to 60 minutes. Take-home trays require daily wear over one to two weeks — most treatments show noticeable results by day five. Over-the-counter whitening kits require consistent daily use for several weeks to show results, and results are typically less dramatic than either professional whitening option.
Outcome and Risk
Professional whitening is very safe when administered by a dentist. Temporary sensitivity and gum irritation are the most common side effects — whitening agents temporarily open pathways in the enamel, which causes sensitivity that typically resolves within 48 hours. Professional supervision during whitening minimises risks of enamel damage. Over-the-counter whitening products carry the same risks at a lower level. Whitening effects vary from moderate to dramatic results depending on the method used and the original degree of tooth discoloration.
When In-Office Whitening Is the Right Call
You have a specific deadline — a wedding, reunion, or event — and need dramatic results quickly. One visit delivers up to 8 shades of improvement.
Your tooth discoloration is deep — staining from tobacco use, coffee, or red wine that penetrates into the enamel. OTC products cannot reach intrinsic stains.
You have sensitive teeth and want professional supervision. The dentist places a gum barrier, monitors the procedure, and can stop early if needed — something no over-the-counter kit provides.
When Take-Home Trays Are the Right Call
You want professional results without a single long appointment. Custom trays deliver gradual whitening over one to two weeks with the same prescription-strength gel used in dental clinics.
You want to maintain results over time at lower cost. Custom fitted trays are reusable — only the gel needs replacing, typically at $20 to $40 per refill.
You have mild to moderate staining from coffee, red wine, or smoking and are not in a hurry. Take-home trays are the most cost-effective professional whitening option for gradual improvement.
For more on the chemistry behind whitening, see teeth whitening works science behind it at Delta Park Dental.
Patients in Brampton can explore teeth whitening in Brampton or
teeth whitening in Woodhill for treatment options near you.
Full service information is available on the teeth whitening service page.
What Most People Get Wrong
The biggest misconception is that baking soda, oil pulling, or coconut oil can meaningfully whiten teeth. Baking soda is a mild abrasive — home teeth remedies like baking soda remove bacteria and some surface stains, similar to a whitening toothpaste. Oil pulling has no clinical evidence for whitening. Neither breaks down stains inside enamel the way hydrogen peroxide does.
The American Dental Association recommends looking for a product with the ADA Seal of Acceptance when choosing any whitening product — this ensures the abrasive level is safe for tooth enamel and the peroxide concentration is within clinically tested ranges.
A second common mistake is whitening before replacing crowns or veneers. Because whitening agents do not affect existing dental work, whitening after new restorations are placed creates a colour mismatch. Whiten first, then match new restorations to the lighter shade.
What We Recommend for Brampton Patients
For most patients in Brampton, the right starting point is a professional cleaning followed by an initial consultation to assess your existing dental work, degree of staining, and oral health. Whitening over active decay or without addressing plaque build-up produces poor results and can worsen sensitivity.
At Delta Park Dental, we offer both in-office whitening and take-home custom trays. If you have sensitive teeth, significant tooth discoloration, or cosmetic restorations that need to be considered, a dentist’s assessment before whitening prevents the common mistakes above.
Book a consultation at our Brampton clinic to discuss which professional whitening options suit your teeth, your timeline, and your budget.
Frequently Asked Questions
How long does professional teeth whitening last?
Professional whitening results last 1 to 3 years with proper care. The main factors are diet — avoiding coffee, red wine, tobacco, and staining foods — and maintenance. Regular brushing with fluoride toothpaste after treatment and scheduling regular professional cleaning appointments extends results. Take-home tray refills between annual visits are the most cost-effective way to maintain whiter teeth.
Is over-the-counter whitening as effective as professional whitening?
No. Over the counter whitening products use hydrogen peroxide or carbamide peroxide at concentrations of 3 to 10% — well below the 25 to 40% used in professional in office whitening. OTC strips and gels can remove surface stains and lighten teeth by one to three shades — a good option if you want to whiten your teeth at home without a prescription. They cannot match the speed and consistency of professional whitening options.
Does teeth whitening damage enamel?
Not when used correctly. Whitening agents temporarily open pathways in tooth enamel during treatment, which can cause sensitivity — but this resolves within 24 to 48 hours and does not cause permanent damage under professional supervision. Overuse of OTC products or high-strength gel without professional guidance increases the risk of enamel erosion and prolonged gum irritation.
Can I whiten my teeth if I have crowns or fillings?
Whitening does not affect crowns, veneers, or fillings — only natural teeth respond to bleaching agents. If your existing dental work is visible when you smile, whitening your natural teeth may create a colour mismatch. The right approach is to discuss the placement and shade of your restorations with your dentist before whitening, so the shade can be matched or planned correctly.
About Delta Park Dental
Delta Park Dental is a family and cosmetic dentistry clinic in Brampton, Ontario. Dr. Shilpa Diwan and the team provide professional teeth whitening and a full range of cosmetic and restorative treatments across Brampton, Mississauga, Caledon, and the GTA. Direct billing to most insurance plans is available — confirm with our office. To book a consultation, call +1 905-494-0094.
Service Area
Delta Park Dental is at 215 Delta Park Blvd, Unit 104, Brampton, ON L6T 0H9. We serve Brampton and surrounding communities including Mississauga, Caledon, and Woodhill. Hours: Mon 10am–4pm | Tue–Sat 10am–6pm.
Next Step
Ready to start? Book a consultation at Delta Park Dental. Our team assesses your oral health, existing dental work, and goals before recommending any whitening treatment. Call +1 905-494-0094 or book online at deltaparkdental.com/contact-us/.
For the full list of services at our Brampton clinic, see the Delta Park Dental services page.
Every smile is different. For accurate information and personalized treatment options,
book a consultation with the team at Delta Park Dental.
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