RCT Full Form in Dentistry: Root Canal Treatment

If your dentist writes RCT, or advises an RCT, they mean root canal treatment. You may also see RCT after a tooth number, such as RCT 46, meaning that tooth has been or will be root treated. Some people also see the term RCT in other medical fields, where it means randomised controlled trial, but in dentistry it almost always means root canal treatment.

Inside every tooth is a soft pulp running down narrow canals in the roots. Deep decay, a crack or an injury can let bacteria reach it. Once the pulp is infected it cannot heal by itself.

The usual reasons are a toothache that wakes you at night, lingering pain to hot or cold, a gum boil, or swelling. Sometimes there is no pain at all and the infection is found on an X-ray. Without treatment the infection can spread to the bone and face. Spreading facial swelling, fever, or difficulty swallowing or breathing needs same-day care, and a hospital emergency department if breathing or swallowing is affected.

The alternative to RCT is usually removing the tooth. Our guide on whether a root canal hurts covers what the procedure feels like.

Under local anaesthetic the dentist opens the tooth, removes the pulp, shapes and cleans the canals, and fills them. Some teeth are finished in one visit and others take more; see single sitting root canal for how that decision is made.

A root-treated tooth is more brittle, so back teeth usually need a crown, as explained in do I need a crown after a root canal. A dentist who focuses on RCT may be called an endodontist. The full process is on our root canal treatment page.