EFECTS OF LATERAL GUIDANCE AND CHEWING PATTERN ON MASTICATORY MUSCLE ACTIVITY AND OCCLUSAL CONTACT.
- Author:
Joon Won KOH
1
;
Young Wan JUNG
;
Ifye Won CHO
;
Tae Ho JIN
Author Information
1. Department of Prosthodontics, School of Dentistry, Wonkwang University, Korea.
- Publication Type:Original Article
- MeSH:
Dental Occlusion;
Humans;
Masseter Muscle;
Mastication*;
Masticatory Muscles*;
Temporal Muscle;
Temporomandibular Joint Disorders
- From:The Journal of Korean Academy of Prosthodontics
1998;36(4):598-614
- CountryRepublic of Korea
- Language:Korean
-
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).
