Composite bonding is a cosmetic dental procedure in which tooth-coloured resin is applied directly to the tooth surface and shaped to improve its appearance. The resin is hardened with a special light and then polished to blend naturally with the surrounding teeth.
It is one of the most minimally invasive cosmetic treatments available — in many cases, no tooth preparation or removal of enamel is required.
What can composite bonding treat?
Chipped or cracked front teeth
Gaps between teeth (diastemas)
Slightly short or uneven teeth
Minor tooth discolouration not resolved by whitening
Exposed root surfaces that are sensitive
Worn tooth edges
Composite bonding is not suitable for large structural problems, significant bite issues, or teeth with extensive decay. For more complex cases, veneers or crowns may be more appropriate.
What does the procedure involve?
Composite bonding is usually completed in a single appointment and rarely requires a local anaesthetic:
The tooth surface is gently prepared with a mild conditioning liquid to help the resin bond securely.
Composite resin, matched to the shade of your tooth, is applied in layers.
Each layer is hardened with a curing light.
The composite is then shaped and polished until it looks and feels natural.
A full set of composite bonding (multiple teeth) can take 2–4 hours. Individual tooth repairs take 30–60 minutes.
How long does composite bonding last?
Composite bonding typically lasts between 3 and 7 years, depending on:
Your diet — hard foods, biting nails, or opening packaging with your teeth can chip the resin
Teeth grinding — if you grind at night, a night guard is strongly recommended to protect bonding
Oral hygiene — plaque around the margins can cause staining and degradation
Habits such as smoking or drinking large amounts of coffee or tea — these stain composite resin more readily than enamel
Individual repairs or chips in the bonding can usually be fixed easily at a review appointment. Eventually, the composite may need to be redone entirely.
Risks and possible complications
Common:
Temporary sensitivity after treatment — usually mild and settles within a few days
Staining over time — composite stains more readily than natural enamel or porcelain
Uncommon:
Chipping of the bonding, particularly in people who grind their teeth
The bonding may not colour-match perfectly over time as natural teeth change shade
Rare:
Debonding — the composite separates from the tooth and needs rebonding
Composite bonding does not protect against tooth decay. The natural tooth beneath still needs to be kept clean and healthy.
Questions to ask your dentist
Should I whiten my teeth before having bonding done?
How much of my natural tooth enamel will need to be prepared?
How realistic are my expectations for the result?
Do I grind my teeth, and do I need a night guard?
When is composite bonding the right choice versus veneers?
This leaflet is for general information only and does not replace professional dental advice. It is intended to support — not replace — the discussion with your dentist about your individual options, risks, and treatment plan. Treatment outcomes vary between patients depending on individual circumstances. Your dentist will confirm exact fees and what is suitable for your specific circumstances before you agree to any treatment.