When all of the patient’s natural teeth are missing from the lower or upper jaw (complete edentulous), the ball and socket removable overdenture treatment is usually recommended. Although ball and socket overdentures can be used for both the upper and lower jaw, it is more suited for the lower jaw. This treatment might require 2 to 4 implants, depending on the quality and amount of bone present. The implants used have ball-type inserts that are cemented or screwed into them. The inserts are then fitted into an o-shaped recipient site underneath the dentures.