It is an undisputed fact that sound periodontal health is a prerequisite for successful orthodontic therapy. Various complex dental problems necessitate a multidisciplinary approach; there cannot be a better example than an ortho-perio interaction. Certain periodontal treatment modalities need to be undertaken before commencing orthodontic treatment. And some periodontal procedures are required after active orthodontic treatment. The aim of this article is to familiarize clinicians in the field of both periodontics and orthodontics with the precautions and clinical techniques necessary to preserve the integrity of already compromised periodontium.