Walk into any chemist in Brisbane and you will find shelves of whitening strips, whitening toothpastes, LED kits, charcoal powders, and whitening pens. They are cheap, they are convenient, and they promise results in days.
Professional whitening at a dental practice costs more and requires an appointment. So is it worth the difference?
This guide compares product types and clinical supervision. If your question is tobacco stain specifically, read our smoker whitening guide, because cleaning and maintenance change the plan.
Over-the-counter whitening products
The products you buy without a prescription fall into a few categories. Here is what the evidence suggests about each.
Whitening toothpaste. These contain mild abrasives and sometimes low-concentration peroxide. They can remove some surface staining from coffee or tea. They do not change the internal colour of your teeth. Expect a subtle improvement at most. Cost: $8 to $20.
Whitening strips. Pre-loaded strips with hydrogen peroxide, typically at 6 to 10 percent concentration. Applied daily for 30 minutes over two to four weeks. They can lighten teeth by one to two shades in some cases, but the one-size strips do not always make consistent contact, which can cause uneven results. Cost: $30 to $60.
LED whitening kits. These include a peroxide gel and a small LED light. The light is marketed as an accelerator, but independent research suggests the LED component in consumer kits has minimal additional effect beyond the gel alone. Cost: $40 to $80.
Charcoal products. Activated charcoal toothpaste and powders are abrasive. They may remove surface staining temporarily, but they do not bleach teeth. There is some evidence that heavy use can wear enamel over time, which may make teeth appear more yellow as the darker dentine layer shows through. We do not recommend charcoal-based whitening.
Dentist-prescribed take-home whitening
This is the middle ground between shop-bought products and in-chair treatment. Your dentist takes impressions of your teeth and fabricates custom-fitted trays. You receive professional-grade whitening gel (typically 10 to 16 percent carbamide peroxide) and wear the trays at home for a prescribed period, usually 30 to 60 minutes per day over two to three weeks.
The difference from over-the-counter products is significant. The custom trays ensure even gel contact across every tooth surface. The peroxide concentration is higher than anything available in a shop. And your dentist has checked your teeth beforehand for cavities, exposed roots, or gum issues that could cause problems during whitening.
The degree of lightening varies with the starting shade, stain type, tooth structure, and prescribed protocol. Cost at Ivy Dental: from $299.
In-chair professional whitening
In-chair whitening uses high-concentration peroxide gel (typically 25 to 40 percent hydrogen peroxide) applied directly by your dentist. The treatment takes about 60 to 90 minutes. Your gums and soft tissues are protected with a barrier before the gel is applied.
The shade is assessed again after the appointment, although the final appearance may continue to settle. The degree of change depends on the starting shade and the type of staining.
Some patients may be offered a clinician-planned combination of in-chair and take-home treatment. More treatment is not automatically better, and the protocol should be based on tooth and gum health, sensitivity risk, and the response to the initial treatment. Cost at Ivy Dental: from $850 for in-chair whitening.
The key differences that matter
Factor | Shop-bought products | Dentist take-home kit | In-chair whitening |
|---|---|---|---|
Peroxide concentration | Up to 6% hydrogen peroxide | 10–16% carbamide peroxide | 25–40% hydrogen peroxide |
Customisation | None. Generic fit. | Custom trays for your teeth | Applied directly by your dentist |
Pre-treatment check | None | Full dental check before starting | Full dental check before starting |
Typical result | Variable; product and contact differ | Gradual change under a prescribed protocol | Change assessed after the in-chair appointment |
Time to result | Product dependent | Set by the prescribed gel and wear schedule | Usually one appointment; timing varies |
Cost | Product dependent | From $299 | From $850 |
Indicative pricing. Your quote may differ based on clinical assessment.
Why a dental check matters before whitening
Whitening gel works by penetrating tooth enamel. If you have an untreated cavity, a cracked tooth, or gum recession exposing the root surface, the peroxide can reach the nerve and cause significant pain.
Over-the-counter products do not come with a dental check. Professional whitening does. Your dentist will identify and address any issues before starting, which is why professional whitening is less likely to cause problems.
If you have existing crowns, veneers, or fillings, these will not change colour with whitening. A dental check helps set realistic expectations for how your smile will look after treatment.
What whitening cannot do
Whitening works on natural tooth enamel. It does not change the colour of porcelain or ceramic crowns, composite fillings or bonding, veneers, or denture teeth. If you have visible restorations on front teeth, whitening your natural teeth may create a colour mismatch. In some cases, existing restorations may need to be replaced after whitening to match the new shade.
Whitening is also less effective on certain types of discolouration. Tetracycline staining (grey or banded discolouration from antibiotic exposure) may respond partially but often requires extended treatment or alternative approaches like veneers. Fluorosis (white spots from excess fluoride during development) can sometimes appear more pronounced after whitening, not less.
Your clinician should assess your staining type before recommending a whitening method.
Who should avoid DIY whitening
Whitening is not suitable for everyone. You should see your dentist before attempting any whitening if you have:
- Untreated cavities or tooth decay
- Gum disease or significant gum recession
- Crowns, veneers, or fillings on visible front teeth
- Severe sensitivity to hot or cold
- Teeth stained by tetracycline antibiotics (these require specialised treatment)
A conversation with your dentist at your next check-up can clarify whether whitening is appropriate and which method suits your situation.
The bottom line
Shop-bought whitening products can remove mild surface staining. For anything beyond that, they are limited by low peroxide concentrations and poor fit. They are not harmful for most people, but they are not particularly effective either.
Professional whitening starts with a dental assessment, uses a clinician-selected product and dose, and provides a plan for sensitivity and existing restorations. Those controls are the main difference from self-selected retail products; no method can promise a particular number of shades.
At Ivy Dental in Everton Park and Nundah, we offer both in-chair and take-home whitening options. We assess your teeth, discuss what is realistic for your situation, and recommend an approach only where whitening is suitable.
Book a whitening consultation at Ivy Dental. Call (07) 3266 7120 or visit us at Everton Park or Nundah. Open 7 days.
