Tooth extraction is required when teeth are badly decayed or broken and cannot be restored. Also, patients sometimes choose extractions as a less expensive alternative to a filling or a crown on a severely decayed tooth.
Another reason that teeth are often removed when they are impacted. Teeth become impacted when they are prevented from growing into their normal position in the mouth. For example, impaction is a common reason for the extraction of wisdom teeth.
Teeth may also be extracted to make more room in the mouth prior to straightening the remaining teeth, or because they are so badly positioned that straightening is impossible.