Document Details

Document Type : Thesis 
Document Title :
THE EFFECT OF DIFFERENT OCCLUSAL SCHEMES ON THE ELECTROMYOGRAPHIC ACTIVITY AND MASTICATORY EFFICIENCY IN COMPLETE DENTURE WEARERS
THE EFFECT OF DIFFERENT OCCLUSAL SCHEMES ON THE ELECTROMYOGRAPHIC ACTIVITY AND MASTICATORY EFFICIENCY IN COMPLETE DENTURE WEARERS
 
Document Language : English 
Abstract : This study was performed on completely edentulous patients to evaluate the effect of different occlusal schemes (bilateral balanced occlusion lingualized occlusion, canine guidance occlusion and monoplane occlusion) on the electromyographic activity and masticatory efficiency. Each patient received denture with one occlusal scheme and followed up for a three months. Then the posterior segments of both maxillary and mandibular denture was exchanged to develop the other occlusal scheme on the same denture base. The Electromyography (EMG) for the masseter and temporalis muscles during clenching in intercupal position and during chewing of carrot, peanut and apple and the masticatory efficiency were evaluated for each occlusal scheme every three months. The results of this study showed that: -The highest EMG activity of masseter muscle during clenching at the intercuspal position for all occlusal schemes except the monoplane occlusion. -There was insignificant difference in EMG activity of masseter muscle during clenching at the intercuspal position among the four occlusal schemes. -There were significant differences in EMG activity of temporalis muscle during clenching at the intercuspal position among the four occlusal schemes. -During grinding carrot, peanut and apple the EMG muscle activity showed significant reduction in magnitude in bilateral balanced scheme, canine guidance occlusal scheme, and the lingualised occlusal scheme compared with monoplane occlusal scheme. - There was a significant increase in EMG activity of masseter and temporalis muscles during grinding carrot, peanut and apple in bilateral balanced occlusal when compared with the canine guidance occlusal scheme. - There was a significant increase in EMG activity of masseter and temporalis muscles during grinding carrot, peanut and apple in bilateral balanced occlusal when compared with the lingualized occlusal scheme. - There was insignificant difference during grinding carrot, peanut and apple in the EMG activity of masseter and temporalis muscles between lingualised occlusal scheme and canine guidance occlusal scheme. -The results of the present study showed no statistically significant difference in masticatory efficiency among the bilateral balanced occlusion, lingualized occlusion and canine guidance occlusion -The results of the present study showed statistically significant reduction in masticatory efficiency in monoplane occlusion when compared with the bilateral balanced occlusion, lingualized occlusion and canine guidance occlusion. Conclusions: Within limitation of this study the following conclusions were obtained. 1- The monoplane occlusion is the last choice occlusal scheme for complete denture because it showed the least masticatory efficiency and the highest EMG muscle activity for both temporalis and masseter muscles. 2- Although there was no significant differences in the masticatory efficiency between bilateral balanced occlusion and lingualized balanced occlusal scheme, the lingualized occlusion is preferred because it showed a lesser EMG muscle activity. 3- Inspite of the canine guidance is a non-balanced occlusion, it is advocated in complete denture because its higher masticatory efficiency and lower EMG activity for both temporalis and masseter muscles. 
Supervisor : MOHAMED ESAM EL- DIN SANAD 
Thesis Type : Master Thesis 
Publishing Year : 1426 AH
2006 AD 
Added Date : Tuesday, January 10, 2012 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
أحمد العقلEl-Okel, Ahmed ResearcherDoctorate 

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