Dr. Julien 닥터줄리엔 on Instagram: "✨ Typical Class II Elastic Setup Explained! Why do we place powerchain on the upper arch and single ties on the lower for many Class II cases? 👇🏼 Because overbite correction needs controlled upper retraction and lower anchorage! Elastics + powerchain = teamwork 💪🦷 🎥 In this Reel: Upper: Powerchain for closing space & helping retract Lower: Single ties for stability & anchorage Class II elastics working to improve the bite ✨ 클래스2 엘라스틱의 전형적인 세팅! 왜 클래스2 케이스에서는 윗