This lecture and seminar course for students in Year 3 of the MSc Orthodontics program comprises didactic and clinical components. Lectures are designed to provide participating students with a greater knowledge and understanding of the principles of orthodontic diagnosis and treatment planning as well as biology of tooth movement, orthodontic appliances, and the role of orthodontics in multidisciplinary treatment. The clinical component puts into practice knowledge gained from previous didactic courses in diagnosing cases suited for interceptive orthodontics through screening sessions the students conduct with DDS3 students, teaching them skills in examination and diagnosis for orthodontic patients. Case-based learning seminars are designed to foster a more indepth discussion of orthodontic diagnosis and treatment planning. Students also conduct a simulated treatment on an orthodontic case and teach DDS3 students all the steps involved with the treatment of a fully bonded orthodontic patient.