Gingivitis or periodontal disease begins with bacterial growth in your mouth. If not properly treated, tooth loss due to destruction of the tissue that surrounds your teeth may occur.
In the early stage of gingivitis, bacteria in plaque build up causes inflamed gums and bleeding during tooth brushing. Periodontitis involves the destruction of the supporting structures of teeth where the inner layer of the gum and bone starts to recede from the teeth and form pockets of small spaces, allowing even more bacteria to collect. Infection sets in and bones, gums and connective tissue are destroyed.