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Three-dimensional cephalometry: Mean reference points (a); Frankfurt Horizontal Plane (b). Midsagittal plane (c). Intercondylar distance assessment (d1). Condyle angle (d2,d3) and Condyle position in the sagittal plane (d4,d5). N–nasion; OrR–Orbital right; OrL–Orbital left; PoR–porion; Ba–basion.
