If a tooth cannot be preserved due to decay or the mouth is overcrowded with teeth, a tooth extraction will be performed. During an extraction, your dentist will remove the entire tooth from the bone.

Wisdom teeth are the molars in the back of your mouth. They are often the last to grow in, crowding the other teeth or become impacted. Impacted wisdom teeth can cause pain and infection, among other problems. These teeth are often extracted to avoid causing future problems. Your dentist will help determine if your wisdom teeth need to be removed.
When saving a tooth is not an option due to infection, an extraction may be performed.
Routine tooth extractions are often a relatively painless process.  After the extraction, your dentist may recommend taking extra care of your tooth socket to ensure it heals properly. You should be careful when brushing your teeth and eating. For minor pain, your dentist may prescribe pain medication.
wisdom tooth extractions