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Indication of tooth extraction. Indication of tooth extraction. 1) Indication of tooth extraction a) Severe caries The most common and widely accepted reason to remove a tooth is that it is severely carious that it cannot be restored. b) Pulpal necrosis Next is the presence of pulp necrosis or irreversible pulpitis that is not amenable to endodontics.
In adults, dental X-rays can be used to: 1  Show areas of decay that may not be visible with an oral exam, especially small areas of decay between teeth. 2  Identify decay occurring beneath an existing filling. 3  Reveal bone loss that accompanies gum disease.  Reveal changes in the bone or in the root canal resulting from infection.