Is Teeth Whitening Safe?

Teeth whitening is one of the most common cosmetic dental treatments for brightening your smile and enhancing your confidence. However, many patients ask the same important question before moving forward: Is teeth whitening safe? The answer is yes — when done under professional supervision. At Woodfield Dental in London, Ontario, we offer safe, effective whitening treatments that are customized to your teeth, your goals, and your oral health. Understanding how whitening works and the difference between professional care and store-bought products can help you make the right decision for your smile.

How Teeth Whitening Works

Teeth whitening uses gentle whitening agents to lift stains that have settled into the enamel over time. These stains often come from:
  • Coffee, tea, or red wine 
  • Smoking or tobacco use 
  • Certain foods and sauces 
  • Natural aging 
  • General wear over time 
Professional whitening uses dentist-approved bleaching agents that break up deep stains while preserving the integrity of your enamel.

Is Professional Teeth Whitening Safe?

Yes. Professional teeth whitening is considered safe because:
  • The whitening solution is controlled and monitored by a dentist 
  • The concentration is adjusted based on your sensitivity and tooth condition 
  • Your gums and soft tissues are protected during the procedure 
  • The treatment is customized to your teeth for even, natural results 
At Woodfield Dental, we evaluate your oral health before whitening to ensure treatment is right for you and will not cause irritation or damage.

What About Store-Bought Whitening Products?

Store-bought whitening kits, strips, and toothpastes are widely available, but they are not customized to your smile. This can lead to:
  • Uneven whitening 
  • Gum irritation 
  • Increased sensitivity 
  • Limited or short-lasting results 
Many over-the-counter products are safe when used correctly, but they are far less effective than professional treatments — and may require repeated use, which can increase sensitivity over time.

Will Teeth Whitening Cause Sensitivity?

Some patients experience temporary tooth sensitivity after whitening, especially if their enamel is naturally thin. However, this sensitivity usually goes away within 24–48 hours. To minimize sensitivity, we may recommend:
  • Using sensitivity-reducing toothpaste before and after whitening 
  • Avoiding very hot or cold foods for the first day 
  • A custom whitening strength that is gentle on your teeth 
Our goal is to brighten your smile comfortably.

Who Should Avoid Teeth Whitening?

Most people are good candidates for whitening, but it may not be recommended if you have:
  • Untreated cavities 
  • Gum disease 
  • Severe enamel wear 
  • Certain types of internal tooth discoloration 
In these cases, we will suggest alternative cosmetic options, such as bonding or porcelain veneers, to help you achieve a bright, natural smile safely.

How to Maintain Whitening Results

Once your teeth are whitened, you can extend your results by:
  • Brushing and flossing daily 
  • Avoiding tobacco products 
  • Rinsing after dark-colored beverages 
  • Visiting us for regular cleanings 
  • Considering touch-up whitening as needed 
Professional whitening results often last 6 months to 2 years, depending on your habits.

Safe, Professional Whitening at Woodfield Dental

At Woodfield Dental in London, Ontario, we offer customized whitening designed to give you noticeable results while protecting your enamel and minimizing sensitivity. Whether you want a subtle refresh or a bright, dramatic change — we create a whitening plan that fits your smile.

Book a Teeth Whitening Consultation Today

Let’s help you achieve a brighter, healthier, and more confident smile — safely.