Periodontitis is advanced gum disease. Unfortunately, the damage is irreversible once you cross the line from gingivitis to periodontitis.
Periodontitis sets in when the infection spreads below the gumline and affects the surrounding teeth and jawbone. The disease can lead to bone deterioration, tooth loss, and jawbone atrophy.
Typical signs of periodontitis include receding gums, chronic bad breath, gingival pockets that may contain pus, and the other symptoms associated with gingivitis.