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ABSTRACT Objective: To assess the influence of perceived stress during the COVID-19 pandemic over awake bruxism (AB) and sleep bruxism (SB). Material and Methods: Observational web-based research carried out in a state in the Brazilian Northeast. The sample was composed of dental students from seven faculties, divided into three groups: beginning (1-4 semesters), middle (5-7), and end (8-10). An online questionnaire was constructed: Socio-demographic, Perceived Stress Scale (PSS-10), Self-reported AB and SB, and COVID-19 Fear Scale. Data were collected from April to June 2021 by sending the questionnaire through WhatsApp®, e-mail, and Instagram®. After bivariate analyses, a multiple logistic regression model was performed to discriminate variables for perceived stress and AB and SB. Hosmer and Lemeshow and chi-square tests were used to check the model's goodness of fit. Results: A total of 391 dental students participated in this research - most women (69.8%), unmarried (69.8%), family income less than three minimum wages (60.9%), self-reported physical activity (63.3%). Perceived stress was low to moderate (72.1%), SB was 39.6%, AB was 49.6%, and low COVID-19 fear was 81.1%. COVID-19 fear (3.03), being female (2.47), and using psychotropic (2.53) increases the chance of being stressed. Perceived stress can predict AB in models 1 (p=0.008) and 4 (p=0.039). There was no significance for perceived stress and SB. Conclusion: Perceived stress during the COVID-19 pandemic influenced awake bruxism. Objective COVID19 COVID 19 COVID-1 (AB . (SB) Methods webbased web based Northeast faculties groups 14 (1- semesters, semesters , semesters) 57, 57 5 7 (5-7) 810. 810 8 10 (8-10) constructed Sociodemographic, Sociodemographic Socio demographic, demographic Socio-demographic PSS10, PSS10 PSS (PSS-10) Selfreported Self reported 202 WhatsApp WhatsApp® email, email e mail, mail e-mail Instagram Instagram® analyses chisquare chi square s fit Results 39 69.8%, 698 69.8% 69 (69.8%) 60.9%, 609 60.9% 60 9 (60.9%) selfreported self 63.3%. 633 63.3% 63 3 (63.3%) 72.1%, 721 72.1% 72 (72.1%) 396 6 39.6% 496 49 49.6% 811 81 81.1% 3.03, 303 3.03 03 (3.03) 2.47, 247 2.47 2 47 (2.47) 2.53 253 53 (2.53 stressed p=0.008 p0008 p 0 008 (p=0.008 p=0.039. p0039 p=0.039 039 (p=0.039) Conclusion COVID1 COVID- (SB (1 (5-7 (8-10 PSS1 (PSS-10 20 69.8 (69.8% 60.9 (60.9% 63.3 (63.3% 72.1 (72.1% 39.6 49.6 81.1 30 3.0 (3.03 24 2.4 (2.47 2.5 25 (2.5 p=0.00 p000 00 (p=0.00 p003 p=0.03 (p=0.039 ( (5- (8-1 (PSS-1 69. (69.8 60. (60.9 63. (63.3 72. (72.1 39. 49. 81. 3. (3.0 2. (2.4 (2. p=0.0 p00 (p=0.0 (p=0.03 (5 (8- (PSS- (69. (60. (63. (72. (3. (2 p=0. p0 (p=0. (8 (PSS (69 (60 (63 (72 (3 p=0 (p=0 (6 (7 p= (p= (p