Your Guide to Composite Bonding
Learn about composite bonding. It is a gentle way to reshape, repair or improve how your teeth look, using tooth-coloured filling material (resin).
What is composite bonding?
Composite bonding is a cosmetic dental treatment. Tooth-coloured filling material (resin) is put straight onto your tooth. It is shaped to make the tooth look better. A special light hardens the resin. Then it is polished so it blends in with your other teeth.
It is one of the gentlest cosmetic treatments. In many cases, none of your tooth needs to be drilled or removed. No enamel is taken away.
What can composite bonding treat?
- Chipped or cracked front teeth
- Gaps between teeth (diastemas)
- Teeth that are a little short or uneven
- Mild staining that whitening has not fixed
- Tooth roots that are showing and feel sensitive
- Worn tooth edges
Bonding is not right for big problems with the shape or strength of a tooth. It is not right for major bite problems, or teeth with a lot of decay. For harder cases, veneers or crowns may suit you better.
What happens during treatment?
Bonding is usually done in one visit. You will rarely need a numbing injection (local anaesthetic).
- A mild liquid is put on the tooth. This helps the resin stick firmly.
- Resin that matches the colour of your tooth is added in layers.
- Each layer is hardened with a special light.
- The resin is shaped and polished until it looks and feels natural.
Bonding a full set of teeth can take 2–4 hours. Repairing one tooth takes 30–60 minutes.
How long does composite bonding last?
Bonding usually lasts between 3 and 7 years. This depends on:
- What you eat and do. Hard foods, biting your nails or opening packets with your teeth can chip the resin.
- Grinding your teeth. If you grind at night, a night guard is strongly advised to protect the bonding.
- How well you clean. Plaque around the edges can stain the bonding and wear it down.
- Smoking, or drinking lots of coffee or tea. These stain resin more easily than natural enamel.
Small chips can usually be fixed easily at a review visit. In time, the bonding may need to be fully redone.
Risks and possible complications
Common:
- Sensitive teeth for a short time after treatment. This is usually mild and settles within a few days.
- Staining over time. Resin stains more easily than natural enamel or porcelain.
Uncommon:
- The bonding chips, mainly in people who grind their teeth
- The colour may stop matching over time, as natural teeth change shade
Rare:
- The bonding comes off the tooth (debonding) and needs to be stuck back on
Bonding does not protect against tooth decay. You still need to keep the natural tooth underneath clean and healthy.
Questions to ask your dental team
- Should I whiten my teeth before having bonding?
- How much of my tooth enamel will need to be prepared?
- Are my hopes for the result realistic?
- Do I grind my teeth, and do I need a night guard?
- When is bonding a better choice than 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 dental team about your individual options, risks, and treatment plan. Treatment outcomes vary between patients depending on individual circumstances. Your dental team will confirm exact fees and what is suitable for your specific circumstances before you agree to any treatment.
Sources
- Dental treatments. NHS website (nhs.uk), reviewed July 2026.
- Veneers. Oral Health Foundation.
- Cosmetic treatment. Oral Health Foundation.
Links checked 18 October 2026.
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Related leaflets
For clinicians: Composite Bonding (Cosmetic) notes template.
Learn more about dental documentation on our blog or see Nosht pricing.