Most people who ask about a brighter smile are bothered by one of two things: the colour of their teeth, or their shape. Which one it is decides most of the choice.
- Whitening lightens natural enamel and nothing else.
- Veneers change shape and colour, and can’t be taken off once fixed (healthdirect, veneers).
- Porcelain and composite veneers are both metal-free.
Is it the colour or the shape?
- Colour only, such as yellowing or tea and coffee staining: whitening may be enough.
- Shape, size or small gaps: whitening can’t change these. Veneers can, though they don’t straighten teeth or fix your bite (healthdirect, veneers).
- Fillings, crowns or veneers already in your smile: whitening gel only lightens enamel, so these keep their colour. Your dentist may need to replace them to match (ADA, teeth.org.au, teeth whitening).
What can whitening do?
A dentist can whiten in the chair, or give you custom trays and gel to use at home. Dentists can use stronger gels than the ones you can buy (ADA, teeth.org.au, teeth whitening).
In trials of home bleaching, teeth lightened over two weeks to six months. The Cochrane reviewers rated that evidence low certainty. Sensitivity and gum irritation were the most common side effects, mostly mild and short-lived (Eachempati et al., 2018).
Sensitivity can sometimes be severe, and strong gel on the gums can burn (ADA, teeth.org.au, teeth whitening). Whitening isn’t recommended while you’re pregnant or breastfeeding (ADA, teeth.org.au, teeth whitening).
What do veneers involve?
Veneers are thin layers of porcelain or composite resin fixed to the front of a tooth. A composite veneer can be done in one visit. Porcelain veneers are made in a laboratory, or in a CEREC machine at some surgeries (healthdirect, veneers).
Porcelain tends to look more realistic and last longer than resin, and costs more (healthdirect, veneers).
The risks include more sensitive teeth, visible edges if your gums shrink, and neighbouring teeth that no longer match. Veneers may not suit you if you grind or clench, or have gum disease (healthdirect, veneers).
Questions to bring to your consultation
- Are my teeth and gums in good shape for this?
- Would whitening or a small repair get me close to what I want?
- How much tooth, if any, would be trimmed?
- How long will it last, and what does upkeep involve?
- Which materials would you use, and why?
- What happens if I wait?
Sources
Where To Read Next
Want more on this topic? This page goes further, and it lists questions to bring to your visit.
Metal-Free Materials Guide
