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Occlusal Analysis of the Patients with Temporomandibular Disorders Using T-Scan II System  

Yang, Dong-Hyo (Department of Oral Medicine, Dankook University School of Dentistry)
Lee, Won-Seop (Department of Oral Medicine, Dankook University School of Dentistry)
Kim, Mee-Eun (Department of Oral Medicine, Dankook University School of Dentistry)
Publication Information
Journal of Oral Medicine and Pain / v.32, no.1, 2007 , pp. 105-111 More about this Journal
Abstract
Correlation between occlusal contact pattern and TMD have been hypothesized and partially investigated but results are controversial and not conclusive. The purposes of this study were to compare right-to-left difference of occlusal contact pattern, through contact points, contact force and occlusal balance, in the patients with unilateral TMD and also to evaluate its change related with TMD treatment. 36 patients with unilateral TMD from Department of Oral Medicine in Dankook University Dental Hospital were selected in this study (M:F=7:29, mean age of $29.2{\pm}14.8$ years). A computerized T-Scan II system (Tekscan, INC., USA) was employed for occlusal analysis and the simultaneity and occlusal balance through the number of tooth contact and magnitude of contact force were determined before and after TMD treatment. The number of contact points and contact force was more on the unaffected side than the affected side before treatment (p=0.056 and p=0.060, respectively) while significant difference between both sides was not found after treatment. The number of contact points and contact force on the affected sides significantly increased after treatment (p=0.038 and p=0.052), but the unaffected sides exhibited no significant difference between before and after treatment. In addition, sides difference in relative contact force decreased from about 27% to about 12% after TMD treatment (p=0.001). According to the results of this study, it is likely that unilateral TMD impairs right-to-left occlusal balance and that conservative TMD treatment alleviates the imbalance, subsequently leading to more symmetrical occlusal condition with increased contact points and force.
Keywords
T-Scan II; TMD; Contact point; Contact force; Occlusal balance;
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