Teeth Whitening at DentalX Downsview Dental Clinic
The colour of your smile naturally changes over time due to everyday factors such as coffee, tea, red wine, and smoking. Even brushing too aggressively or the natural ageing process can gradually reduce the brightness of your teeth by wearing down the outer enamel layer. As enamel thins, the darker underlying dentine becomes more visible, making teeth appear dull or discoloured.
At DentalX Downsview Dental Clinic, we offer safe, reliable, and professional teeth whitening treatments designed to enhance your smile while maintaining a natural appearance. Our goal is to deliver noticeable results while ensuring your teeth remain healthy and well cared for.
Our whitening systems are clinically tested and carefully selected for their effectiveness and safety. Many patients experience a significant improvement in brightness, with results that can reach a very light, natural-looking shade depending on individual suitability.
With proper at-home maintenance and guidance from our dental team, whitening results can be long-lasting. We also provide custom trays and instructions to help you maintain your brighter smile over time.
Our experienced team is here to support you throughout your whitening journey, ensuring comfortable treatment and predictable results. Contact Us today.
FAQs
What's the difference between in-office whitening and at-home whitening ?
The main difference between in-office whitening and at-home whitening is the strength of the whitening agent, speed of results, and level of professional supervision.
In-Office Teeth Whitening
In-office whitening is done at the dental clinic under professional supervision.
How it works:
- A high-strength whitening gel is carefully applied to your teeth
- The gums are protected to avoid irritation
- In some cases, a special light may be used to enhance the effect
- The entire treatment is completed in a single visit
Benefits:
- Fast results (often noticeable in one appointment)
- Performed and monitored by a dental professional
- Ideal for patients wanting immediate improvement
Considerations:
- Can cause temporary sensitivity in some patients
- Typically more expensive than at-home options
At-Home Teeth Whitening
At-home whitening is done using custom-made trays provided by your dentist.
How it works:
- Impressions or digital scans are taken to create custom trays
- A lower-strength whitening gel is placed in the trays
- You wear them at home for a set period each day or overnight
Benefits:
- Gradual, controlled whitening
- Can be more comfortable for sensitive teeth
- Easy to maintain and repeat as needed
Considerations:
- Results take longer (usually 1–2 weeks or more)
- Requires consistent daily use for best results
Key Difference
- In-office whitening = faster, stronger, immediate results
- At-home whitening = slower, gentler, more gradual control
Which one is best?
The best option depends on:
- How quickly you want results
- Your level of tooth sensitivity
- The amount of staining present
- Your lifestyle and preference
A dental assessment helps determine which treatment is safest and most effective for your smile.
Will it damage my teeth?
No — professional teeth whitening does not damage your teeth when it is carried out correctly under dental supervision.
Whitening treatments work by using safe, controlled bleaching agents that temporarily open the pores in the enamel to remove stains. Once the treatment is complete, the enamel naturally rehydrates and returns to its normal state.
What you might notice (normal effects)
- Temporary tooth sensitivity (especially to cold)
- Mild gum irritation if gel briefly touches the gums
- These effects are short-term and usually resolve within a few days
What does NOT happen with professional whitening
- It does not “thin” or permanently weaken enamel
- It does not remove healthy tooth structure
- It does not cause long-term damage when used properly
Why supervision matters
When whitening is done by a dental professional:
- The strength of the gel is carefully controlled
- Gums are protected
- Your teeth are assessed beforehand to ensure it’s safe for you
- Any existing issues (like cavities or gum disease) are treated first
Important note
Over-the-counter or unregulated whitening products are more likely to cause problems because they may be too strong or poorly fitted.
If you’re unsure whether whitening is right for you, a quick dental assessment can confirm the safest option for your smile
If my teeth get sensitive, will it be permanent?
No — tooth sensitivity after professional whitening is almost always temporary, not permanent.
Why sensitivity happens
Whitening agents temporarily open microscopic pores in the enamel so stains can be lifted. During this short period, your teeth may react more to cold, air, or sweet foods.
How long does it last?
- Most people: 24–72 hours
- Some cases: up to a few days
- Permanent sensitivity from professional whitening is extremely rare
How we reduce sensitivity
- Adjusting the strength or frequency of whitening gel
- Using desensitising agents before, during, or after treatment
- Recommending sensitive toothpaste before and after whitening
- Custom-fitted trays (for home whitening) to prevent gel leakage
When to tell us
If sensitivity lasts longer than expected or feels uncomfortable, let us know. We can pause treatment, modify it, or provide additional relief options.
Professional whitening is designed to be safe, controlled, and comfortable
Will my fillings change colour?
No — fillings do not change colour with tooth whitening.
Why fillings don’t whiten
Professional whitening gels only work on natural tooth enamel. Materials used for fillings (such as composite/white fillings), crowns, or veneers do not respond to whitening agents.
What this means for your smile
- Your natural teeth will become whiter
- Existing fillings will stay the same shade
- If a filling is on a visible tooth, it may look darker after whitening
What we usually recommend
- Whitening before replacing visible fillings
- Shade-matching new fillings to your freshly whitened teeth
- Reviewing older fillings after whitening to see if replacement is needed for aesthetics
This approach ensures the most natural, even-looking result. If you’d like, we can assess your fillings and plan whitening accordingly.