If there is a reduction of probing depths after scaling and root planing but still mobility in anterior mandibular teeth, what is the best course of action?

The best course of action in this scenario is to periodically evaluate the anterior mandibular teeth that exhibit mobility, despite a reduction in probing depths following scaling and root planing. This approach is appropriate because the presence of mobility may indicate residual periodontal issues or structural concerns that warrant ongoing observation.

By choosing to monitor the teeth regularly, it allows the clinician to assess any changes in mobility, attachment levels, or further signs of periodontal disease over time. This ongoing evaluation can inform whether additional interventions are necessary, whether further non-surgical treatments may help stabilize the teeth, or if more invasive options might be required in the future.

Extracting the teeth would be premature given that there has been improvement in probing depths, suggesting that the periodontal health is improving. Starting orthodontic treatment or referring for surgery might be considered only if evaluations indicate that these approaches would be beneficial after thorough assessment. Therefore, a strategy of periodic evaluation aligns with a conservative and evidence-based approach to managing periodontal health while monitoring the condition of the teeth.