Is Teeth Whitening Safe? An Oral Health Therapist Explains
Teeth whitening is one of the most popular cosmetic dental treatments in Australia — and for good reason. A brighter smile can boost confidence, enhance your appearance and help you feel your best.
But one of the most common questions I get as an Oral Health Therapist is:
“Is teeth whitening actually safe?”
The short answer? Yes — when it’s done correctly and professionally.
Let’s break it down.
How Teeth Whitening Actually Works
Teeth whitening works by using a peroxide-based gel (either hydrogen peroxide or carbamide peroxide) that penetrates the enamel and breaks down deep stains within the tooth structure.
These stains can come from:
Coffee, tea and red wine
Smoking or vaping
Ageing
Certain medications
Natural tooth colour and genetics
Professional whitening systems are designed to work effectively without damaging your teeth when used correctly.
Is Professional Teeth Whitening Safe?
When whitening is provided or supervised by a qualified dental professional, such as an Oral Health Therapist, it is considered safe and evidence-based.
At Stunning Smiles, every client:
Receives a thorough consultation
Is assessed for suitability
Is guided through the correct aftercare
Uses high-quality, regulated whitening products
This ensures both safety and optimal results.
What About Sensitivity?
Tooth sensitivity is the most common side effect of whitening — and it’s usually temporary.
Sensitivity can occur because:
The whitening gel opens microscopic pores in the enamel
Nerves temporarily become more responsive
The good news?
✔️ Sensitivity usually settles within 24–48 hours
✔️ Professional systems include desensitising agents
✔️ Treatment can be adjusted to suit sensitive teeth
If you already have sensitive teeth, this doesn’t automatically rule out whitening — it just means it needs to be done properly and conservatively.
Are DIY and Online Whitening Kits Safe?
This is where things get tricky.
Some over-the-counter or online kits:
Have poorly regulated ingredients
Use ill-fitting trays
Encourage overuse
Lack professional assessment
This can increase the risk of:
Gum irritation or burns
Uneven whitening
Prolonged sensitivity
Little to no result at all
That’s why professionally supplied home whitening kits — like those we offer — are a much safer option. You get the convenience of whitening at home, with the guidance of a dental professional.
