On May 19–20, 2025, the Department of Orthodontics, Mahidol University Faculty of Dentistry, had the honor of welcoming Dr. Jean-Marc Retrouvey, an international expert, to deliver a lecture on “Biomechanics for Fixed Appliances and Clear Aligners.” The lecture was held at Lecture Room B2, 7^th Floor, 50^th Anniversary of H.R.H. Princess Maha Chakri Sirindhorn Building, Faculty of Dentistry, Mahidol University.