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Quintessence Int 44 (2013), No. 1     28. Nov. 2012
Quintessence Int 44 (2013), No. 1  (28.11.2012)

Online Article, Page 44, doi:10.3290/j.qi.a28735, PubMed:23573535


Online Article: The temporomandibular opening index and condylar asymmetry in myogenous TMD and non- TMD patients: Report of a pilot study
Karic, Vesna V. / Miller, Victor J. / Nehete, Swati R. / Ofec, Ronen / Smidt, Ami
Objective: The temporomandibular opening index (TOI) is endfeel distance divided by active and passive mouth opening. The asymmetry index (AI) is a measure of difference in left and right condylar heights. This study examined the relationship between AI and TOI in myogenous TMD and non-TMD patients.
Method and Materials: Fourteen myogenous TMD patients diagnosed by the Research Diagnostic Criteria for Temporomandibular Disorders (RDC/TMD) were recruited (1 man and 13 women) and 14 non-TMD patients (6 men and 8 women) were included as controls. Differences between the TMD patients and control group of non-TMD patients were determined by the two-tailed t test, while multiple linear regression analysis was used to examine the correlation between AI and TOI adjusting for sex and age.
Results: AI and TOI were significantly higher (P = .001 and P = .045, respectively) among TMD patients. A significant positive correlation was found between TOI and AI for the TMD group (r = 0.84, P = .01) but not for the control group.
Conclusion: A positive correlation was found between TOI and AI in the myogenous TMD group.

Keywords: condylar asymmetry, myogenous, opening index, TMDs