title: Natural head position and inclination of craniofacial planes.
abstract: OBJECTIVE
  To assess the angles between craniofacial planes and the gravity horizontal plane (GHP).
  
  
  METHODS
  The plumb line was hung from the ceiling, the Fox plane (FoxP) was placed in the mouth, and 56 Angle Class I subjects were photographed in a natural head position. FoxP represents the extraoral view of the occlusal plane.
  
  
  RESULTS
  In frontal view, bipupilar plane (BP) and occlusal plane (FoxP) were almost parallel to GHP. In lateral view, FoxP was almost parallel to GHP, but Frankfort horizontal plane (FHP) and Camper's plane (CP) were not. FoxP and CP were not parallel.
  
  
  CONCLUSIONS
  CP is not a reliable landmark for occlusal plane reconstruction. FHP does not represent GHP.
authors.affiliation: Department of Prosthodontics, School of Dental Medicine, University of Zagreb, Croatia. nikolapetricevic@yahoo.com
authors.forename: Nikola
authors.initials: N
authors.lastname: Petricevic
authors.forename: Asja
authors.initials: A
authors.lastname: Celebic
authors.forename: Robert
authors.initials: R
authors.lastname: Celic
authors.forename: Maja
authors.initials: M
authors.lastname: Baucic-Bozic
mesh_terms: D002508:Cephalometry / Q000379:methods*; D003766:Dental Occlusion; D005145:Face / Q000033:anatomy & histology*; D005147:Facial Bones / Q000033:anatomy & histology*; D005260:Female; D006112:Gravitation; D006257:Head / Q000033:anatomy & histology*; D006801:Humans; D007091:Image Processing, Computer-Assisted; D008297:Male; D009915:Orbit / Q000033:anatomy & histology; D010781:Photography; D011187:Posture; D011680:Pupil; D012658:Sella Turcica / Q000033:anatomy & histology