Are bone grafts required after tooth extraction?

Not required...: If you want to support the gum tissue or for to support an implant in the future, then it's a good idea.

Not always: For routine extractions, especially when there is adequate bone all around the socket where the tooth was extracted, there is no reason for a bone graft. However, when there is loss of bone from periodontal disease or an infection and the area is to be replaced with a restoration, especially a dental implant, bone grafts are advisable. It may be done at the time of surgery or at a later date.

Depends: It depends on the goal. If a dental implant is planned, then yes. Sometimes, bone grafts can be performed at wisdom tooth sites and where lesions of the jaw bone were removed. Consult with your dentist.