fa تخصصي Special مروری Review Article <br> <div style="text-align: right;"></div> <span style="font-size:12pt"><span style="line-height:16.0pt"><span new="" roman="" style="font-family:" times=""><b><i><span style="font-size:9.0pt">Background & Aims</span></i></b><b><span style="font-size:9.0pt">: </span></b><span style="font-size:9.0pt">Bruxism, known as human oral parafunctional habit, can be performed consciously or unconsciously during the day and night. The aim of this study was to investigate the prevalence of bruxism and its related factors in students at Birjand University of Medicals Sciences (Birjand, Iran) in 2019.</span></span></span></span><br> <span style="font-size:12pt"><span style="line-height:16.0pt"><span new="" roman="" style="font-family:" times=""><b><i><span style="font-size:9.0pt">Materials & Methods</span></i></b><b><span style="font-size:9.0pt">: </span></b><span style="font-size:9.0pt">In this descriptive-analytical cross-sectional study, 659 students were selected. The instruments used were the Persian version of the Bruxism Questionnaire from the American Academy of Sleep Medicine and Emotional Stress Questionnaire Association and that of the Depression, Anxiety, and Stress Questionnaire (DASS-21). After collecting, all data were analyzed by the SPSS (<i>p </i>< 0.05). </span></span></span></span><br> <span style="font-size:12pt"><span style="line-height:16.0pt"><span new="" roman="" style="font-family:" times=""><span style="font-size:9.0pt">&nbsp;<b><i>Results</i></b>: In this study, 63% and 37% of students were female and male, respectively. The prevalence of bruxism in students was 31.1%. This value was significantly high in the students who had a history of bruxism in their family members (<i>p</i> < 0.05). Also, there was a significant relationship of age and stress with bruxism (<i>p</i> < 0.05), but relationship of gender, depression, and anxiety with bruxism was insignificant (<i>p</i> > 0.05).</span></span></span></span><br> <span style="font-size:12pt"><span style="line-height:16.0pt"><span new="" roman="" style="font-family:" times=""><b><i><span style="font-size:9.0pt">Conclusion</span></i></b><b><span style="font-size:9.0pt">: </span></b><span style="font-size:9.0pt">The factors associated with bruxism were stress, family history, and age. Hence, it is suggested to consider stress as one of the important risk factors in the development of bruxism. By controlling this problem, bruxism and its subsequent results can be controlled.</span></span></span></span> <div style="border-bottom:solid windowtext 1.0pt; padding:0mm 0mm 9.0pt 0mm"></div> Bruxism, Prevalence, Stress, Student 81 88 http://hsm.umsu.ac.ir/browse.php?a_code=A-10-98-1&slc_lang=fa&sid=1 Mehrnaz Khademi mehr.kh6688@yahoo.com 10031947532846001511 10031947532846001511 No Dentistry Clinical Research Development Center, Birjand University of Medical Sciences, Birjand, Iran Ariya Vashani vashani@gmail.com 10031947532846001512 10031947532846001512 No Student Research Committee, Birjand University of Medical Sciences, Birjand, Iran Freshteh Osmani fereshteh.osmani@gmail.com 10031947532846001513 10031947532846001513 Yes Infectious Diseases Research Center, Birjand University of Medical Sciences, Birjand, Iran