In terms of bone loss, what threshold defines stage I periodontitis?

In the classification of periodontitis, stage I is characterized by mild bone loss associated with the disease. Specifically, this stage is defined by a threshold of less than 15% of clinical attachment loss, which corresponds to a similar percentage of bone loss. This small amount of bone loss indicates that while there is periodontal disease present, it is still in the early stages where intervention and management can be quite effective.

In broader terms, the categorization of periodontitis into stages helps clinicians determine the severity of the disease and make informed decisions on treatment plans. Understanding this staging is crucial for assessing the individual's periodontal health and implementing appropriate care strategies that correspond to the degree of inflammation and destruction present.