ORTHODONTICS - QUICK REVISION KEY POINTS
TOPIC: CLASSIFICATION OF MALOCCLUSIONS
🔹Zygoma (or) Key ridge corresponds to the Mesiobuccal root of the upper 1st molar
🔹A patient is having an edge to edge or end on relation of the first molar in the permanent dentition with retroclined incisors. According to Angle’s classification, this is Class II div I
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