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Cephalometric landmarks. N Nasion, S Sella, P Porion, Co Condylion, Pt Pterion, Or Orbitale, Pns Posterior nasal spine, Ans Anterior nasal spine, A Point A, B Point B, Pg Pogonion, Gn Gnathion, Me Menton, Go Gonion, U1r Root Apex Upper central incisor, U1t Tip Upper central incisor, L1r Root Apex Lower central incisor, L1t Tip Lower central incisor, U6d Distal Upper first molar, L6d Distal Lower first molar.
