What Are the Options for Teeth Whitening? In-Chair, Take-Home and Toothpaste

Whitening does not lighten fillings, crowns or veneers, so they may look different from natural teeth after treatment (ADA, teeth whitening). Ask the dentist to identify existing restorations before choosing a whitening method or a target shade.

If you are mainly concerned about one darker area, ask what is causing that colour and whether whitening is likely to address it. A general whitening plan may not answer a local problem. Tell the dentist whether you would consider replacing an existing restoration or prefer to leave sound work alone.

Ask for the cost of any proposed replacement separately from the whitening fee. You can decide on a modest colour change or no treatment if matching everything would require more dental work than you want. Also ask how the proposed result will be assessed and what maintenance involves. A product label or an example photograph cannot predict how your particular combination of teeth and restorations will look.

• Australian Dental Association. Teeth whitening

You can decline whitening, and you should have an assessment before deciding which method suits you. The ADA describes dentist-supervised in-chair and take-home approaches, with sensitivity and gum irritation among the risks to discuss (ADA, teeth whitening).

Ask why the dentist recommends one approach, what you would need to do at home and what to do if discomfort develops. Explain any past sensitivity, previous whitening and the timing of any event you have in mind. The plan should fit your dental condition rather than be chosen only for speed.

Request the full cost, including trays, gel, reviews and any future top-ups that are proposed. Ask what improvement is realistic for your staining and what would happen if you were disappointed. You can leave with information and decide later. Choosing no cosmetic change is reasonable; agreeing to a consultation is not agreeing to buy a whitening course or replace existing dental work.

• Australian Dental Association. Teeth whitening

Sensitivity and gum irritation can occur with whitening, and you should know how to respond before starting. A Cochrane review of home whitening found these were commonly reported effects, while evidence comparing products was uncertain (Eachempati and colleagues, 2018).

Tell the dentist about existing sensitivity, sore gums and any product you have already tried. Ask whether a dental problem needs attention first, how much gel to use if you are given trays and what symptoms mean you should pause and contact the practice. Do not assume that using more gel or wearing trays longer improves the result.

Ask who will review your progress and whether that visit is included in the fee. If you are pregnant or breastfeeding, raise that before treatment; the ADA advises avoiding whitening because safety evidence is lacking (ADA, teeth whitening). A good plan explains limits and aftercare as clearly as the hoped-for colour change, without promising that discomfort cannot happen.

• Eachempati P, et al. Home-based chemically-induced whitening of teeth in adults. Cochrane, 2018
• Australian Dental Association. Teeth whitening