Abstract
Objectives : The purpose of the study is to verify the correlation between teenagers' use of internet and temporomandibular joint disorders(TMJD) because TMJD patients gradually increase in high school students. Methods : Subjects were 221 male high school students attending liberal arts and commercial schools from 9 to 21 of April, 2012. Students completed self-reported questionnaire. Results : TMJD symptoms included crackling joint (32.1%), headache (18.6%), malocclusion (8.1%), and jaw fatigue and muscular aching (7.2%). Students having at least one symptom accounted for 49.8%. Students having at least one poor habit accounted for 83.7% and 34.0% of the students used internet for 3 hours.. Score of students experiencing shoulders and chest pain was <TEX>$5.13{\pm}1.10$</TEX> (p<0.05). Score of TMD afflicting area revealed <TEX>$4.67{\pm}2.73$</TEX> (p<0.05) in mastication pain (<TEX>$4.13{\pm}2.73$</TEX> (p<0.05)) due to long hours of internet use. Score of jaw fatigue related to muscular pain was <TEX>$4.31{\pm}1.96$</TEX> (p<0.01). Duration of computer use was related to perceived TMJD symptoms (r=.153). Long duration of computer use was related to poor oral cavity habits (r=.157). Conclusions : Male high school students can perceive slight TMD which needs self management and regular check-ups and try to prevent TMD by utilizing measurement tools on TMD. Also, this study helps to prevent from worsening TMD by shortening hours of computer utilization.
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