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KMID : 0617719980080010001
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Journal of Wonkwang Dental Research Institute
1998 Volume.8 No. 1 p.1 ~ p.22
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EFFECTS OF LATERAL GUIDANCE AND CHEWING PAIL ERN ON MASTICATORY MUSCLE ACTIVITY AND OCCLUSAL CONTACT
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Abstract
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This study was performed to investigate the influence of lateral guidance pattern and chewing pattern on masticatory muscle activity and occlusal contact pattern. Twenty-five patients with temporomandibular disorders and thirty students without temporomandibular disorders were selected for this study. Electromyographic examination and occlusal contact examination were performed simultaneously with Bio-Pak System(Bioresearch Inc.,U.S.A.) and T-Scan System(Tekscan Co., USA). The obtained results were as follows
1. The EMG activity of masseter and anterior temporal muscle in patient group with canine guidance
was higher than with non-canine guidance , but there was no significant differance (p>0.05).
2. The EMG activity of anterior temporal muscle in normal group with non-canine guidance was
higher at preferred chewing side than at opposite side (p<0.05).
3. The EMG activity of masseter muscle was higher in normal group than in patient group (p<0.05). 4. The number of occlusal contact in patient group with canine guidance was higher than with non-canine guidance, but there was no significant differance (p>0.05).
5. The occlusal contact force at preferred chewing side was higher in patient group than in normal group (p<0.05).
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KEYWORD
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