Abstract
The author attempted to examine the influence of occlusion on the regularity of masticatory movement and the muscle activity. Eight Japanese dentate subjects, allin their 20 s, with semi-group functioned occlusion (SGO) were selected and their masticatory activities were recorded simultaneously with a multipurpose monitoring/recording device and the Saphon Visi-Trainer, Model CII.
The masticatory phase, number of masticatory strokes, and duration of muscular discharge were studied by having the subjects masticate peanuts, ham and pickled radish at fixed intervals. The SGO type subjects tended to show different characteristics from those with mutually protected occlusion. In SGO subjects the masticatory path was biased to the grinding style and the ratio of grinding function was dominant. These facts suggest that it is imperativeto take the prosthodontic treatment, diagnosis of mandibular function, occlusal adjustment andreconstruct of occlusion into consideration to determine the type of occlusion of the patients.
