A root canal is performed when the nerve of the tooth is diseased due to decay, infection, or as result of trauma to the tooth. The nerve which is the live tissue inside the tooth is removed and the space is filled with special dental material.
The tooth after a root canal is very brittle and has to be crowned to protect it from breaking and having to be pulled. When a tooth needs a root canal it is usually; very sensitive to hot and cold, prone to having severe aching, or has an abscess underneath. Occasionally a tooth is symptom free. Root canals are very successful treatment; only on rare occasions will a tooth be re-treated. Want more information?