Cavitations are infection of the bone after tooth extraction. It is believed that most of these infections are caused by two things: leaving the tendon that was attached to the tooth and not excavating the site of infection. Another cause may be the use of drugs during the procedure that cut off the blood flow to the site.
The best practice when cavitations are found is to clean out the site, remove any dead tissue, bone, and the tendon, then allow the blood to clot. This blood clot forms the site for new cells to grow, to actually fill in the missing bone and build new healthy tissue. A dry socket or a closed site over active infection does not allow this healing process to occur.
When cavitations occur, they are often asymptomatic. Although the bone is being eaten by nasty anaerobic bacteria, there may be no pain. The bacteria, however, is exuding powerful toxins that may be causing damage to your immune system or the toxins may be the underlying cause of your chronic health condition(s).