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Table 1 Definitions of abbreviations of the less usual cephalometric variables used

From: Treatment effects of the Jasper Jumper and the Bionator associated with fixed appliances

  Definition
1.PP (°) Angle formed by the maxillary incisor long axis and the palatal plane (PP)
1-PP (mm) Linear distance from the maxillary central incisor edge projected perpendicularly to the PP
6-PP (mm) Linear distance from mesiovestibular cusp of the maxillary first molar projected perpendicularly to the PP
6-ANSperp (mm) Linear distance from the maxillary first molar mesial point to the ANSperp line (line perpendicular to palatal plane passing through anterior nasal spine)
1.NA (°) Angle formed by the maxillary incisor long axis and the NA line
1-NA (mm) Linear distance between the most anterior point of the maxillary central incisor and the NA line
IMPA (°) Angle formed by the mandibular incisor long axis and the mandibular plane (GoMe)
1-GoMe (mm) Linear distance between the mandibular incisor edge perpendicular to GoMe
A-Nperp (mm) Linear distance from Point A to the Nperp line (line perpendicular to the Frankfort plane passing through point N)
Pog-Nperp (mm) Linear distance from Pog to the Nperp line
1.NB (°) Angle formed by the mandibular incisor long axis and the NB line
1-NB (mm) Linear distance between the most anterior point of the mandibular central incisor and the NB line
6-Pogperp (mm) Linear distance between the mandibular first molar mesial point to the Pog-perp line (line perpendicular to the mandibular plane Go-Me passing through Pog)
6-GoMe (mm) Linear distance between the mesiovestibular cusp of the mandibular first molar perpendicular to GoMe
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