Internal Teeth Whitening
Internal teeth whitening is recommended when the nerve in a tooth has died either from an accident, broken tooth or tooth decay, a dentist or endodontist performs a root canal treatment on the tooth. Sometimes, this causes the tooth to darken and require whitening to correct the colour change.
This can be lightened by the dentist drilling a small hole in the back of the tooth and removing some of the root canal filling. Bleach is then placed in the tooth and sealed inside by a temporary filling for one week.
This process can be repeated many times to further whiten the tooth. Once the treatment is complete, the dentist removes the bleach and reseals the tooth with a permanent filling material. In some cases the tooth is too dark, or staining can’t be removed – usually from antibiotic or flourosis staining. A crown or veneer would be the preferred option in these cases.