과개교합 개교합 및 정상교합의 교근 침묵기에 관한 연구

문  철  현

전남대학교 대학원 치의학과

(지도교수 : 정현수)

(Abstract)

The present study was carried out to investigate the relationship betwwen the depth of overbite and the masseteric silent period. Normal subjects of 44 were selected, which consisted of 9 open bites, 24 normal overbites and 11 deep bites, all were 19~29 years of age. EMG activity was recorded on the bilateral masseteric muscles and craniofacial radiography was done.

The following results were obtained.

1. The mean duration of masseteric silent period was 18.58±4.50 msec in open bite, 17.37±           7.05 msec in normal overbite and 19.30±7.62 msec in deep bite groups.

2. There were no significant differences on masseteric silent period among open bite, normal           overbite and deep bite groups.

3. There were no significant correlations between masseteric silent preiod and craniofacial variables.