A tooth extraction is only performed when less invasive procedures would be ineffective Here are some reasons a tooth extraction might be necessary.
A tooth extraction is exactly what it sounds like: the complete removal of a tooth from the mouth. An extraction is usually only necessary in the following situations:
If the tooth is damaged beyond repair, either by breakage or decay.
If the tooth is impacted, or otherwise causing damage to the teeth around it (as is often the case with wisdom teeth).
A dentist will always elect to preserve a damaged tooth if it is at all possible, because the empty spaces left by missing teeth can cause serious oral health problems. If the problem can be fixed with a filling, inlay, onlay, crown or root canal, these types of restorations are preferable to extractions.