title: Temporomandibular Joint Hypermobility Manifestation Based on Clinical Observations.
abstract: BACKGROUND
  Joint range of motion might affected by some factors like laxity and increase joint mobility. Generalized joint hypermobility and temporomandibular joint hypermobility (TMJH) are reported as risk factors for temporomandibular disorders. The aim of this study was to survey the etiological factors of TMJH and its relations to habitual status.
  
  
  METHODS
  In this cross-sectional descriptive study, 69 patients with TMJH were involved. After profiling personal information and medical history, the patients were divided into three groups based on their maximum mouth opening (MMO) as follow: (Light) MMO of 50-55 mm, (moderate): MMO between 55 and 65 mm, (severe) MMO >65 mm. For subjective observations, patients were asked to fill the prepared questionnaire. The objective evaluations conducted by a specialist. Finally, all the data subjected Chi-Square test by using SPSS software version 22 at a significant level of 0.05.
  
  
  RESULTS
  TMJH was more common in women (74.2%). The light group had significant differences with other groups in the discomfort of TMJ and TMJ sound (P < 0.05). Furthermore, sever group manifested highest percentage of masticatory pains, significantly (P < 0.05).
  
  
  CONCLUSIONS
  It can be concluded that pain in TMJ would have a correlation with MMO.
authors.affiliation: Assistant professor, Dental Implants Research Centre and Department of Prosthodontics, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran.
authors.forename: Saeid
authors.initials: S
authors.lastname: Nosouhian
authors.affiliation: Assistant professor, Dental Implants Research Centre and Department of Oral and Maxillofacial Surgery, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran.
authors.forename: Abbas
authors.initials: A
authors.lastname: Haghighat
authors.affiliation: Assistant professor, Dental Implants Research Centre and Department of Oral and Maxillofacial Surgery, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran.
authors.forename: Iman
authors.initials: I
authors.lastname: Mohammadi
authors.affiliation: Assistant professor, Torabinejad Research Centre and Department of Endodontics, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran.
authors.forename: Elham
authors.initials: E
authors.lastname: Shadmehr
authors.affiliation: Dentistry student, Dental Students Research Centre, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran.
authors.forename: Amin
authors.initials: A
authors.lastname: Davoudi
authors.affiliation: Post graduate student, Department of Operative Dentistry, Dental School, Shahid Sadoughi University of Medical sciences, Yazd, Iran.
authors.forename: Hamid
authors.initials: H
authors.lastname: Badrian
keywords: Generalized joint hypermobility; Temporomandibular joint; Temporomandibular joint disorder