Teeth whitening is one of the most popular cosmetic treatments in Australia, and also one of the most misunderstood. If you have ever wondered whether whitening damages your enamel, why it makes your teeth twinge, or whether the kits at the chemist actually work, you are not alone. Here are honest answers to the questions we hear most often.
So, is teeth whitening safe?
For most healthy adults, yes. The active ingredient in professional whitening is usually hydrogen peroxide or carbamide peroxide, which lifts stains from the surface and within the enamel. Used correctly, it does not soften or thin your enamel. The key words are “used correctly” — safety depends on the strength of the product, how it is applied, and the health of your teeth and gums before you begin. That is why a general check-up matters before any whitening.
Why do my teeth feel sensitive afterwards?
Some sensitivity is normal and usually temporary. Whitening gel briefly opens tiny channels in the enamel, which can make teeth more reactive to cold or air for a day or two. It almost always settles on its own. You can reduce it by:
- Using a toothpaste made for sensitive teeth in the lead-up
- Spacing out your whitening sessions rather than rushing them
- Avoiding very hot or cold food and drink straight afterwards
Sharp or lingering pain is not normal — it can point to an untreated cavity, a crack, or gum recession, which is another reason a professional assessment comes first.
Professional whitening vs over-the-counter kits
Supermarket and pharmacy kits, whitening toothpastes and online products are cheap and easy to grab, but they involve trade-offs. Their peroxide concentration is limited by law, so results are milder and slower. One-size-fits-all trays and strips can also let gel leak onto your gums and cause irritation.
Professional teeth whitening, whether done in the chair or with a custom take-home kit, uses trays moulded to your teeth and stronger, dentist-supervised gel. Because your mouth is checked first, issues like decay or worn enamel are picked up before they are made worse. As a cosmetic treatment, whitening is generally not covered by Medicare, and health fund rebates for it are uncommon, so it is worth checking directly with your fund.
How long do the results last?
Whitening is not permanent. Most people enjoy brighter teeth for several months to a couple of years, depending on their habits. Coffee, tea, red wine and smoking are the biggest culprits for staining teeth again. You can make results last longer by:
- Cutting back on staining food and drinks, or rinsing with water afterwards
- Keeping up regular brushing, flossing and professional cleans
- Using occasional top-up treatments as advised by your dentist
Who should avoid or delay whitening?
Whitening is not right for everyone. It is generally best to wait or seek tailored advice if you:
- Are pregnant or breastfeeding, as safety research is limited and most dentists suggest waiting
- Are under 18, since younger teeth are still developing
- Have untreated decay, gum disease or exposed tooth roots
- Have crowns, veneers or fillings on your front teeth, which will not change colour and may end up mismatched
It also helps to know that whitening only lightens natural tooth structure. If discolouration comes from an old filling, an injury or medication, other cosmetic dentistry options may give a better result, and we are happy to explain what those involve.
Talk to us before you whiten
The safest whitening starts with a healthy mouth and honest advice, not guesswork. If you would like to know whether whitening is right for you, the team at Southside Dental Group in Richlands is here to help. Call us on (07) 3279 8811 or book through our contact page, and we will point you in the right direction — even if that means holding off for now.
