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Fig. 5 | Progress in Orthodontics

Fig. 5

From: A prospective clinical trial of the effects produced by the extrusion arch in the treatment of anterior open bite

Fig. 5

Cephalometric diagram used for cephalogram measurements: PP: palatal plane, horizontal reference line passing from anterior nasal spine (ANS) to posterior nasal spine (PNS); 1, U1.PP: angulation of maxillary central incisor to PP; 2, U1-PP: linear distance of maxillary incisor incisal edge to PP; 3, U1tip to U6D: linear distance of maxillary incisor tip to maxillary first molar distal aspect perpendicular to PP; 4, U6.PPo: angular measurement determined by a line passing through the mesio-buccal cusp and root apex, perpendicular to maxillary first molar mesial surface to PP; 5, U6-PP: distance of maxillary first molar mesio-buccal cusp to PP; 6, 1.1: Interincisal angle: angle formed between maxillary and mandibular incisor long axes

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