Root canal treatment is the only means to save a tooth when irreversible pulp (nerve) damage has occurred. This commonly manifests as pain or tooth ache. However it may also manifest as an incidental finding on X-rays or during a dental examination where a painless blister or swelling is observed on the gum.
The damage to the pulp may have been caused by deep decay, cracks in the tooth, trauma or repeated dental procedures. If the tooth is not treated the pain may persist, an abscess may develop which can be even more painful and debilitating. In the event where there was no pain, the infection can increase in size making the subsequent treatment more difficult.
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