Composite bonding uses tooth-coloured resin, applied directly to the teeth, to change their shape, shade or outline, for example to cover a chip or close a small gap. It is usually a cosmetic treatment, so in most cases it is paid for privately rather than on the NHS. The General Dental Council (GDC) advises that your teeth and gums should be healthy before any cosmetic work starts.
What composite bonding is
The GDC describes composite bonding as using a plastic, tooth-coloured, resin-based material to alter a tooth's shape, shade, contour or overall appearance. Very little of the natural tooth is removed. The same family of materials is used for white fillings, which the Oral Health Foundation describes as a mix of glass or ceramic particles and a resin that hardens once placed.
Bonding is one of several ways to change how teeth look. Others include teeth whitening, veneers and crowns. Our cosmetic dentistry guide compares them.
Who it is for
Bonding is used to change the appearance of teeth that are chipped, worn, uneven or slightly gapped. The GDC says that getting oral health stable, and giving preventive care first, should come before elective cosmetic treatment. In practice that means any decay or gum disease should be treated before bonding is placed. The GDC also says the dentist should discuss reasonable alternatives with you.
What happens
The GDC expects a proper assessment before treatment. That includes your medical history, an examination of your mouth, X-rays where needed, and photographs. You should then be told about the risks, limitations, alternatives and the upkeep the bonding will need, so you can give informed consent.
On the day, the composite is applied directly to the tooth, shaped and set hard. It is worth asking the dentist to check your bite before you leave, because the GDC notes that added material can change how the teeth meet.
NHS or private
The NHS provides treatment that is clinically needed to keep your mouth, teeth and gums healthy, and says you will usually need to get cosmetic treatment privately. Where a tooth-coloured material is needed to repair a damaged tooth for health reasons, that is a filling rather than cosmetic bonding. White fillings are available on the NHS when clinically necessary. See our fillings guide.
Private prices vary by practice and by how many teeth are treated. Ask for a written treatment plan with costs before you agree to anything, and see our costs guide.
How to choose a practice
- Check the dentist on the General Dental Council register. Only registered dental professionals can legally provide dental treatment in the UK.
- Expect a full examination first, not a quick quote based on a photo.
- Ask what the alternatives are, how long the bonding is likely to last in your case, and what maintenance and repairs will cost.
- Ask to see the written plan and consent information before the appointment.
The GDC reported that complaints about composite bonding rose as a share of clinical complaints, from 18% in 2021 to 22% in 2022. Common themes were inadequate diagnosis, poor consent, rushed treatment and weak aftercare. Those are the areas to ask about before you book.
Risks and aftercare
The GDC lists the main limitations of composite:
- Staining, because composite is more porous than enamel and can pick up colour from food and drink.
- Gradual loss of shine and surface wear.
- Chipping, fracture or the bonding coming away from the tooth.
- Decay in the treated teeth.
- Changes to your bite, speech or chewing that may need adjusting.
Bonding is often described as reversible. The GDC says that while composite can technically be removed, taking it all off without altering or damaging the enamel is extremely difficult. Treat it as a long-term commitment.
Keep up brushing twice a day with fluoride toothpaste, clean between your teeth every day, and go to your regular check-ups so the dentist can look at the bonding and your gums.
Sources: General Dental Council: Bonding boom, composite bonding insights for dental professionals (28 April 2026); Oral Health Foundation: White fillings; NHS: Dental services available on the NHS; NHS: How much NHS dental treatment costs; NHS: Gum disease; General Dental Council: Registration.
Last reviewed: 6 October 2026. This guide is general information, not medical advice.