Journal of Oral Medicine and Pain

  • 제39권3호
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  • Pages.100-106
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  • 2014
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  • 2288-9272(pISSN)
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  • 2383-8493(eISSN)
대한안면통증구강내과학회 (Korean Academy of Orofacial Pain and Oral Medicine)
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Relationship between Mandibular Asymmetry and Temporomandibular Disorders

  • Noh, Ji-Young (Department of Periodontology, School of Dentistry, Seoul National University) ;
  • Lee, Jeong-Yun (Department of Oral Medicine and Oral Diagnosis, School of Dentistry, Seoul National University)
  • 투고 : 2014.07.09
  • 심사 : 2014.08.05
  • 발행 : 2014.09.30
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초록

Purpose: This study was performed to investigate the relationship between temporomandibular disorders (TMDs) and the asymmetry of the mandibular height. Methods: We compared 100 randomly selected TMD patients diagnosed by the research diagnostic criteria for TMD (RDC/TMD) Axis I with 100 non-TMD control subjects matched with the TMD patients in age and gender. The mandibular heights were measured on an orthopantomogram and the asymmetry index (AI) was calculated as previously described. Results: The absolute AI value of 4.37% turned out to be the least cut-off value defining asymmetry, which showed a significant difference in asymmetry incidence (p<0.01) between the TMD and control groups. The risk of TMD increased in the asymmetry group by 4.57 (odds ratio). The incidence of asymmetry was not related to age and gender in both of the TMD and control groups. When dividing the TMD group according to the RDC/TMD Axis I diagnosis, neither the incidence of muscle disorder nor disk displacement was related to the incidence of asymmetry. However, a higher incidence of asymmetry was observed in the subjects classified into the arthrosis/arthritis groups (p<0.01). Conclusions: Although it does not imply a direct cause-and-effect relationship, asymmetry resulting in more than 4.37% difference between mandibular heights may increase the risk of TMD and correlates positively to the incidence of arthritic change in the temporomandibular joint of TMD patients.

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  2. TMD symptoms and vertical mandibular symmetry in young adult orthodontic patients in North Sumatra, Indonesia: a cross-sectional study vol.7, pp.2046-1402, 2018, https://doi.org/10.12688/f1000research.14522.1
  3. TMD symptoms and vertical mandibular symmetry in young adult orthodontic patients in North Sumatra, Indonesia: a cross-sectional study vol.7, pp.2046-1402, 2018, https://doi.org/10.12688/f1000research.14522.2