title: Trajectories of condylar points during nonworking side and protrusive movements of the mandible.
abstract: BACKGROUND
  During lateral excursive and protrusive jaw movements, condylar points are distant from any instantaneous rotational center. Therefore, it is likely that different condylar points would follow similar trajectories during these movements.
  
  
  OBJECTIVE
  This study evaluated the effect of changes in condylar point location on trajectories of condylar points on the nonworking side and during a protrusive jaw movement and compared these changes with the effects described for open-close and working-side condylar movements in the same group of subjects.
  
  
  METHODS
  The movements of 5 clinically determined condylar points were recorded in 44 subjects during a contralateral excursion and during protrusion (7 radiographically determined condylar points in 2 subjects).
  
  
  RESULTS
  During any single jaw movement, the trajectory of each condylar point was similar in form and dimension to the other condylar points within that subject.
  
  
  CONCLUSIONS
  Changes in condylar point location had little effect on the trajectories of condylar points on the nonworking side and during protrusive jaw movement.
authors.affiliation: Faculty of Dentistry, Westmead Hospital Dental Clinical School, Westmead, Australia.
authors.forename: C C
authors.initials: CC
authors.lastname: Peck
authors.forename: G M
authors.initials: GM
authors.lastname: Murray
authors.forename: C W
authors.initials: CW
authors.lastname: Johnson
authors.forename: I J
authors.initials: IJ
authors.lastname: Klineberg
mesh_terms: D000328:Adult; D001696:Biomechanical Phenomena; D002508:Cephalometry; D003196:Computer Graphics; D003766:Dental Occlusion; D005260:Female; D006801:Humans; D007091:Image Processing, Computer-Assisted; D007574:Jaw Relation Record; D008297:Male; D008334:Mandible / Q000502:physiology; D008335:Mandibular Condyle / Q000000981:diagnostic imaging / Q000502:physiology*; D009068:Movement; D011859:Radiography; D015203:Reproducibility of Results; D012399:Rotation; D013704:Temporomandibular Joint / Q000502:physiology