The Journal of Korean Academy of Prosthodontics (대한치과보철학회지)
- Volume 36 Issue 4
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- Pages.598-614
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- 1998
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- 0301-2875(pISSN)
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- 2005-3789(eISSN)
EFECTS OF LATERAL GUIDANCE AND CHEWING PATTERN ON MASTICATORY MUSCLE ACTIVITY AND OCCLUSAL CONTACT
측방유도형태 및 저작습관이 저작근 활성도 및 교합접촉에 미치는 영향
- Koh, Joon-Won (Department of Prosthodontics, School of Dentistry, Wonkwang University) ;
- Jung, Young-Wan (Department of Prosthodontics, School of Dentistry, Wonkwang University) ;
- Cho, Hye-Won (Department of Prosthodontics, School of Dentistry, Wonkwang University) ;
- Jin, Tae-Ho (Department of Prosthodontics, School of Dentistry, Wonkwang University)
- Published : 1998.08.01
Abstract
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 difference (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 difference (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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