When moving from Phase II to Phase III periodontal care, what probing depth indicates a need for advancement?

The transition from Phase II to Phase III periodontal care is a critical step in the management of periodontal diseases. This phase typically focuses on supportive periodontal therapy and long-term maintenance after initial treatment. A probing depth of over 4 mm, especially when accompanied by bleeding on probing, indicates that there may still be active periodontal disease. This situation signals a need for additional intervention because it demonstrates persistent inflammation and a potential for further attachment loss.

Readings over 4 mm suggest that the patient has pockets deep enough where bacterial biofilm may establish, potentially leading to further periodontal tissue destruction. In cases where probing depths exceed this threshold, timely periodontal care becomes paramount to prevent disease progression. The presence of bleeding on probing serves as an additional indicator of inflammatory activity, which further emphasizes the necessity for advancement to Phase III care with appropriate interventions to manage the periodontal condition effectively.

In contrast, other options, such as pockets measuring less than 4 mm or relying solely on the presence of no pocket depth reduction, do not necessarily warrant a move to Phase III care. A probing depth below 4 mm can indicate good periodontal health, while a lack of depth reduction without considering inflammation may overlook critical assessment factors in periodontal disease management.