Dentures may be needed because of advanced periodontal disease. You may notice that many of your teeth are loose and painful. If you notice this you may have passed the point to save them. Periodontal disease causes bone to be lost and if not detected early enough the bone recedes leaving little to support your teeth. They may have to be removed. Removing your teeth and replacing them with a denture may be the best way to eliminate the infection and restore the health of your mouth.