Orthodontics — Key differences for NEET MDS
SNA = 82 degrees maxilla position relative to cranial base. SNB = 80 degrees mandible position relative to cranial base. ANB = 2 degrees skeletal relationship Class I. ANB greater than 4 = Class II skeletal. ANB less than 0 = Class III skeletal. Wits appraisal when ANB unreliable. Tweed triangle = FMA FMIA IMPA. Steiner analysis = SNA SNB ANB.
📖 Read full notes →NiTi = most flexible lowest stiffness for alignment phase. Stainless steel = highest stiffness for finishing detailing. TMA = beta titanium = intermediate properties. Ideal arch wire sequence: NiTi then TMA then SS. MBT prescription most common. Roth prescription = 0 degree torque. Pre-adjusted edgewise = straight wire.
📖 Read full notes →NEET MDS frequently tests the ability to differentiate between related topics. Understanding the key differences between Cephalometric Analysis and Orthodontic Wires & Brackets in Orthodontics is crucial for scoring well. Questions may test diagnostic features, treatment approaches, or characteristic findings.