title: [Relationships between MRI image changes of lateral pterygoid muscle, disc position and condylar mobility in Class II patients].
abstract: OBJECTIVE
  To analyze the relationships between MRI image changes of lateral pterygoid muscle (LPM), disc position and condylar mobility.
  
  
  METHODS
  Twenty Class II patients were chosen and MRI images of LPM were taken. The relationships between MRI image changes of LPM, disc position and condylar mobility were analyzed.
  
  
  RESULTS
  The rate of MRI image changes of LPM in Class II patients was about 45%. No significant correlations were found between MRI image changes of LPM, condylar mobility and disc position.
  
  
  CONCLUSIONS
  MRI image changes of LPM in Class II patients was common but no significant correlations were found between MRI image changes of LPM, condylar mobility and disc position.
authors.affiliation: Department of Orthodontics, Faculty of Stomatology, Capital University of Medical Sciences, Beijing 100050, China.
authors.forename: Chuan-li
authors.initials: CL
authors.lastname: Zhou
authors.forename: Xiao-jiang
authors.initials: XJ
authors.lastname: Yang
authors.forename: Bang-kang
authors.initials: BK
authors.lastname: Wang
authors.forename: Yu-xing
authors.initials: YX
authors.lastname: Bai
mesh_terms: D002648:Child; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008312:Malocclusion, Angle Class II / Q000473:pathology* / Q000503:physiopathology*; D011626:Pterygoid Muscles / Q000473:pathology*; D016059:Range of Motion, Articular; D013704:Temporomandibular Joint / Q000503:physiopathology*