earticle

영어

The objective of this study is to determine the influence of sleep disorder on the population of Streptococcus mutans in the oral cavity. Total 158 college students were divided into GSHG(Good sleep habits group) and DSPG(Delayed sleep phase group) in accordance with their sleep habits, and also were classified into NSG(Normal sleep group) and SDG(Sleep disorder group) in accordance with the degree of daytime sleepiness. We conducted a survey about average sleep hours in weekends and weekdays, and daytime sleepiness index with ten volunteers of each GSHG and DSPG, and also 15 volunteers of each NSG and SDG. BY using selective medium, we compared the amount of salivation and the population of Streptococcus mutans in the oral cavity. In the study results, the average weekend sleep hours of DSPG(547.5±66.99) were significantly more than the ones of GSHG(452.8±49.07)(p<0.05) while the average weekend sleep hours of SDG(544.5±92.74) were significantly more than the ones of NSG(415±37.84)(p<0.05). In comparison of population of S. mutans, the average population of DSPG(11.6±2.78(107 CFU/ml)) was significantly more than the one of GSHG(6.7±2.75 (107 CFU/ml))(p<0.05). In case of salivation amount, there was no significance in the classification in accordance with sleep habits while the classification based on daytime sleepiness index showed significant difference in the amount of salivation between NSG(0.282±0.064 ml,) and SDG(0.228±0.058 ml)(p<0.05). In conclusion, it was found that college students' bad sleep habits increased the population of Streptococcus mutans in the oral cavity. We also found that college students who experienced daytime sleepiness had more population of Streptococcus mutans in the oral cavity and the amount of their salivation was also decreased compared to the students who had no experience of it.