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Occlusal risk factors associated with temporomandibular disorders in young adults with normal occlusions

  • Chen Wang
    Affiliations
    Institute of Stomatology, Nanjing Medical University and Department of Prosthodontics, Stomatologic Hospital affiliated to Nanjing Medical University, Nanjing, China
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  • Xinmin Yin
    Correspondence
    Reprint requests: Xinmin Yin, Institute of Stomatology, Nanjing Medical University and Department of Prosthodontics, Stomatological Hospital affiliated to Nanjing Medical University, 140, Han-zhong Road, Nanjing 210029, P. R. China
    Affiliations
    Institute of Stomatology, Nanjing Medical University and Department of Prosthodontics, Stomatologic Hospital affiliated to Nanjing Medical University, Nanjing, China
    Search for articles by this author

      Objective

      The aim of this study was to characterize occlusal stability in young adults with temporomandibular disorder (TMD).

      Study Design

      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.
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      1. Michelotti A, Cioffi I, Festa P, Scala G, Farella M. Oral parafunctions as risk factors for diagnostic TMD subgroups. J Oral Rehabil;37:157-62.