Case type II is when there is inflamed gum tissue and slight bone loss. There is a small amount of alveolar bone loss which is the bone that hold the teeth. Case type III has more advanced gingival inflammation and increased bone destruction. Furcation may be involved, this is when the bone level has receded towards the roots in multi-rooted teeth and now there is space between the roots instead of bone. Case type IV is further progression of gingival inflammation with major alveolar bone loss.
Furcation involvement is highly likely and increased tooth mobility is present.
Case type V includes several unclassified types of periodontal disease characterized by rapid bone loss. There is a resistance to normal therapy and the condition is usually associated with gingival inflammation and continued pocket formation. Tobacco has been linked in the progression of periodontal disease. Hormones influence periodontal disease. Treatment of periodontal disease begins with good home care.