Slide show: Root canal treatment
Illustration showing cleaned root canal
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After the diseased pulp is removed, the pulp chamber and root canals are flushed and cleaned. The root canals may be reshaped and enlarged to allow better access for filling later. Before permanently filling the root canals, they should be clean of all infection and dried. Medication is sometimes put into the pulp chamber and root canal to clear any infection. The tooth may be left open to drain for several days. If infection has spread beyond the tooth, you may need a prescription for antibiotics. If the root canal requires multiple visits, a temporary filling is placed in the crown to protect the tooth and keep out debris and saliva. Avoid biting or chewing on the tooth until it's been treated and restored.

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