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Fig. 2 | Progress in Orthodontics

Fig. 2

From: Control of anterior segment using an antero-posterior lingual sliding retraction system: a preliminary cone-beam CT study

Fig. 2

CBCT orientation (a) and 3D coordinates of anterior teeth (b). a The XY-plane is parallel to the FH-plane, the YZ-plane is parallel to midsagittal plane (perpendicular to FH plane, including Na-Ba line), and origin point is determined to the nasion. b U1CP (the maxillary central incisal edge point), U1RP(the maxillary central incisors root apex point), U3CP (the maxillary canine cusp point), U3RP(the maxillary canine root apex point), and U6CP (the maxillary first molar mesiobuccal cusp point) were measured

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