The 2017 classification differentiates between gingivitis and gingival diseases based on:

The classification of gingivitis and gingival diseases as outlined in the 2017 update primarily hinges on the presence or absence of dental biofilm. This distinction is essential because the presence of biofilm is a significant factor in the etiology of gingivitis. When dental biofilm accumulates, it can lead to inflammation of the gums, which characterizes gingivitis.

The classification emphasizes that gingival diseases can be plaque-induced (resulting from biofilm) or non-plaque-induced, highlighting that the disease's onset is closely related to the presence of microbial deposits on the teeth. This separation allows for a more precise diagnosis and understanding of the underlying causes of gingival issues, thus guiding effective treatment strategies.

While factors like the extent of tissue loss, patient age, health history, and available treatment types may play a role in managing periodontal conditions or understanding a patient's overall periodontal health, they are not the primary factors in differentiating between gingivitis and other gingival diseases according to the 2017 classification.