Abstract
There have been many reports on the relation between craniofacial morphology and jaw functions such as mastication, swallowing, jaw movement and bite force. However, most of these reports have to provided appropriate classifications of craniofacial morphology or definite indicators of jaw function in subjects.
The present study included 11 men having normal occlusion with natural dentition in the short face group, as in Takeuchi's study, and the relation between the EMG activity of masticatory muscles during vertical clenching and craniofacial morphology or force was studied. The results were also compared with the EMG activity obtained for normal face individuals.
The above finding suggest that careful attention to craniofacial morphology is necessary for evaluation of jaw function using the EMG activity of masticatory muscles as an index.
