Abstract
The purpose of this study was to make clear electromyographic feature of complete denture wearers. 31 edentulous patients who had no problems (complete denture group) and 15 subjects with complete dentitions (normal dentulous group) were selected. The EMG of the masseter muscles and the anterior part of temporalis muscles, elicited by Tapping movement and chin taps during maximum clench (Clench and chin tap) were divided 4 divisions as follow:
B. T. C.: before tooth contact
S. P. L.: silent period latency
S. P. D.: silent period duration
A. S. P.: after silent period
Each division was analyzed automatically with mini computer system, and mean ofduration and mean average of integration were measured. The data were compared with the normal dentulous group. The results were summarized as follows:
1. On tapping movement, S.P.L. duration extended about 1-2 ms (significant difference at P<0.01).
2. Mean average of integration during clenching was about half, especially, masseter was obvious.
3. The other parameters were similar to normal dentulous group.
