There are several reasons why people may need root canals.
One reason would be trauma. Hitting a tooth hard enough can cause the tooth to die and need a root canal. Fracturing a tooth by biting into something hard can expose the nerve and also lead to a root canal. The final reason for a root canal is illustrated in the picture below. If a cavity is left untreated and it gets down into the nerve of the tooth then that tooth will need to have a root canal. The need for a root canal may be indicated if a person has moderate to sever pain in the area of the problem tooth. Another indication would be a s
mall pimple or lump forming in the are of the tooth.
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