distress(6) Treatment(6) age(6) Result(6) pandemic(6) survey(6) participant(6) COVID-19(6) lockdown(6) Patient(6) questionnaire(6) Gender(3) COVID 19(3) COVID-19 infection(3) scale(3) chi-square test(3) MOST(3) Mann-Whitney(3) thought(3) Orthodontic Clinic(3) temporomandibular disorder(3) evaluate(3) rising(3) cross-sectional(3) Prevalence(3) Frequency(3) association(3) subject(3) average(3) TMD(3)