title: Occlusal risk factors associated with temporomandibular disorders in young adults with normal occlusions.
abstract: OBJECTIVE
  The aim of this study was to characterize occlusal stability in young adults with temporomandibular disorder (TMD).
  
  
  METHODS
  Thirty-one patients (aged 19-31 years) with complete natural dentition and Angle class I occlusion who exhibited TMD were compared with 31 age- and sex-matched healthy control subjects. The occlusal registrations were performed using the T-Scan II occlusal imaging and analysis system. Center of occlusal force, asymmetry index of occlusal force, maximal movement of COF, premature contacts, clusion time, and disclusion time were recorded.
  
  
  RESULTS
  Compared with control subjects, TMD subjects had a significantly higher frequency of premature contacts (16/32, 50.0%) and greater bilateral asymmetry in the occlusal force. Furthermore, prolonged clusion time and disclusion time also were observed in TMD subjects.
  
  
  CONCLUSIONS
  These results suggest that a significant association exists between occlusal stability and TMD in young adults.
authors: Institute of Stomatology, Nanjing Medical University and Department of Prosthodontics, Stomatologic Hospital affiliated to Nanjing Medical University, Nanjing, China.
authors: Chen
authors: C
authors: Wang
authors: Xinmin
authors: X
authors: Yin
mesh_terms: D000328:Adult; D001732:Bite Force; D016022:Case-Control Studies; D016009:Chi-Square Distribution; D003766:Dental Occlusion; D005260:Female; D006801:Humans; D008297:Male; D008311:Malocclusion, Angle Class I / Q000503:physiopathology; D012307:Risk Factors; D013705:Temporomandibular Joint Disorders / Q000503:physiopathology*