抄録
Patients with severe jaw deformity and significant mastication disorders are usually treated by surgical orthodontic treatment. Since remarkable morphological and functional changes occur after such treatment, many studies have been performed to elucidate the effect of this treatment on occlusal stability and mandibular function. In this study, 29 adult females who had undergone surgical orthodontic treatment received mastication training with specific chewing gums, and surface electromyograms were taken before and after training at one point on the masseter muscle and at two points on the temporal muscle. This training group was compared with 11 adult females who had no training. Thus, we investigated the effect of this training on the masseter muscle and the temporal muscle.
The results were as follows:
1. In the training group, the sum of the three integratedpotentials of muscle activity increased significantly after training with respect to the control group.
2 The significant increase in the sum of the three integrated potentials of muscle activity was due to the masseter muscle rather than to the temporal muscle.
