title: Magnetic resonance imaging evaluation of discal attachment of superior head of lateral pterygoid muscle in individuals with symptomatic temporomandibular joint.
abstract: OBJECTIVE
  There has been much speculation on the role of the lateral pterygoid muscle (LPM) in temporomandibular joint (TMJ) internal derangement. As a result, this muscle has been the focus of many reports attempting to understand its possible role in TMJ internal derangement.
  
  
  METHODS
  Magnetic resonance (MR) imaging exams of 108 TMJ disorder patients were assessed for types of morphologic insertion of the superior head of LPM to the condyle-disc complex and possible correlation with disc position. The investigation was made on the sagittal T1-weighted MR images in closed- and open-mouth positions.
  
  
  RESULTS
  There was a lack of correlation between attachment pattern of the superior head of LPM and presence or absence of anterior disc displacement.
  
  
  CONCLUSIONS
  The explanation of anterior disc displacement based on the attachment type of the superior head of LPM is unlikely; the type of muscular insertion does not appear to have a predictive or prognostic value for TMJ internal derangement.
authors.affiliation: Oral and Maxillofacial Radiology, University of Connecticut School of Dental Medicine, Farmington, CT, USA. jellodent@yahoo.com
authors.forename: Galal
authors.initials: G
authors.lastname: Omami
authors.forename: Alan
authors.initials: A
authors.lastname: Lurie
mesh_terms: D006801:Humans; D008279:Magnetic Resonance Imaging; D011626:Pterygoid Muscles / Q000473:pathology*; D013705:Temporomandibular Joint Disorders / Q000473:pathology*