A filling is used when you may have a tooth that has been damaged from tooth decay and requires a “patch”. The tooth may still be good, but in order to prevent further decay, it needs to be filled. Composite fillings are ideal if the decay is in a tooth that is in the front of your mouth or for anyone who wishes to have a filling that matches the color of their teeth. Composites are also used to reshape a tooth that may be disfigured. They may also help to protect your tooth from breakage and can reduce the sensitivity in the tooth by insulating it.