In most cases, loose or painful teeth are caused by advanced periodontal disease. Periodontal disease also causes bone loss, and if it is not caught in time, your teeth may have to be removed because there is not enough bone to support them. Removing your teeth and replacing them with a denture or partial may be the best way to eliminate the infection caused by periodontal disease and restore the health of your mouth. Dentures and partials are also a way to replace already existing missing teeth to restore full function of all of your teeth. In some situations implants can be used in conjunction with dentures for a more secure fit.