Are diseases affecting the tissues that surround and support the teeth (periodontal) that include, in addition to the gums, the alveolar bone and other structures responsible for keeping the teeth firmly implanted in the jaw. Periodontal diseases are divided into two large groups: the gingivitis and parodontitis. In there's a superficial inflammation of gingivitis gums, being easily handled, with full recovery of the tissues. Parodontitis in there is a destruction of the deeper structures, with bone resorption, and if not treated, can lead to tooth loss. Usually do not cause pain, even in more advanced cases.