Slide show: Root canal treatment
Illustration showing removal of decayed pulp during root canal
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A root canal is usually done by an endodontist or a general dentist. The root canal usually takes one to three visits. First, you have dental X-rays to check the extent of damage. You also receive a local anesthetic to control pain, which may be more severe if the tooth is abscessed. Then a rubber-like sheet called a dental dam is put in your mouth to keep the tooth clean, protected and free of saliva. Decay is removed, and an opening is made through the crown of the tooth to gain access to the pulp chamber. Using small dental instruments, the infected or diseased pulp is removed.

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