The soft tissues are either drilled out of the root canal(s) with engine driven rotary files, or with long needle-shaped hand instruments known as hand files ( H files and K files). To eliminate bacteria from the pulp chamber and root canals, the use of efficient antiseptics and disinfectants is necessary. To cure the infection and save the tooth, the dentist drills into the pulp chamber and removes the infected pulp. Usually, some inflammation and/or infection is already present within and/or below the tooth. If a tooth is considered so threatened (because of decay, cracking, etc.) that future infection is considered very likely or inevitable, a pulpectomy (removal of the pulp tissue) is advisable to prevent such infection.
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