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Background: Bruxism is defined as repetitive masticatory muscle activity characterized by clenching or grinding of the teeth and it has been related to psychological factors, such as personality traits, anxiety and stress.


Objective: To investigate association between stress and bruxism among university students.


Materials and methods: Lipp's Stress Symptoms Inventory for Adults (LSSI) was applied to 253 university students in Diamantina, Brazil. They were clinically evaluated to verify dental wear. The non-instrumental evaluation of probable bruxism was determined by the patients’ reports. Sociodemographic variables and self-reported stress data were collected by using the questionnaire. The chi-square test was used, and significance level of 5% (p<0.05) was adopted.


Results: The prevalence of bruxism was 45.8% and stress, 37.9%. There was no significant association between the presence of stress diagnosed by ISSL and bruxism (p = 0.815). Among the students diagnosed as stressed, 31.6% were in the resistance phase. Self-reported stress was associated with the habit of tooth grinding (p < 0.001).


Conclusions: No association was found between stress and bruxism. Nevertheless, the prevalence of bruxism among these students was considered high.

Dhelfeson Douglas de Oliveira, Universidade Federal dos Vales do Jequitinhonha e Mucuri

Universidade Federal dos Vales do Jequitinhonha e Mucuri, Faculdade de Ciências Biológicas e da Saúde, Departamento de Odontologia, Diamantina, Minas Gerais, Brasil. Orcid: 0000-0002-8628-3122

Jadimar Brum-Júnior, Universidade Federal dos Vales do Jequitinhonha e Mucuri

Universidade Federal dos Vales do Jequitinhonha e Mucuri, Faculdade de Ciências Biológicas e da Saúde, Departamento de Odontologia, Diamantina, Minas Gerais, Brasil. Orcid: 0000-0001-5586-5851

Luana Soares, Universidade Federal dos Vales do Jequitinhonha e Mucuri

Universidade Federal dos Vales do Jequitinhonha e Mucuri, Faculdade de Ciências Biológicas e da Saúde, Departamento de Odontologia, Diamantina, Minas Gerais, Brasil. 

Wyllerson Cerqueira, Universidade Federal dos Vales do Jequitinhonha e Mucuri

Universidade Federal dos Vales do Jequitinhonha e Mucuri, Faculdade de Ciências Biológicas e da Saúde, Departamento de Odontologia, Diamantina, Minas Gerais, Brasil. Orcid: 0000-0002-4560-2932

Igor Costa, Universidade Federal dos Vales do Jequitinhonha e Mucuri

Universidade Federal dos Vales do Jequitinhonha e Mucuri, Faculdade de Ciências Biológicas e da Saúde, Departamento de Odontologia, Diamantina, Minas Gerais, Brasil. Orcid: 0000-0002-2530-7098

Evandro Oliveira, Universidade Federal dos Vales do Jequitinhonha e Mucuri

Universidade Federal dos Vales do Jequitinhonha e Mucuri, Faculdade de Ciências Biológicas e da Saúde, Departamento de Odontologia, Diamantina, Minas Gerais, Brasil. Orcid: 0000-0003-4219-1821

Gabriela Gomes, Universidade Federal dos Vales do Jequitinhonha e Mucuri

Universidade Federal dos Vales do Jequitinhonha e Mucuri, Faculdade de Ciências Biológicas e da Saúde, Departamento de Odontologia, Diamantina, Minas Gerais, Brasil. Orcid: 0000-0003-4219-1821

Agnes Murta, Universidade Federal dos Vales do Jequitinhonha e Mucuri

Universidade Federal dos Vales do Jequitinhonha e Mucuri, Faculdade de Ciências Biológicas e da Saúde, Departamento de Odontologia, Diamantina, Minas Gerais, Brasil. Orcid: 0000-0002-1115-1811

Karine Taís Tavano, Universidade Federal dos Vales do Jequitinhonha e Mucuri, Faculdade de Ciências Biológicas e da Saúde, Departamento de Odontologia, Diamantina, Minas Gerais, Brasil.

Universidade Federal dos Vales do Jequitinhonha e Mucuri, Faculdade de Ciências Biológicas e da Saúde, Departamento de Odontologia, Diamantina, Minas Gerais, Brasil. Orcid: 0000-0002-8381-408X

Endi Galvão, Universidade Federal dos Vales do Jequitinhonha e Mucuri, Faculdade de Ciências Biológicas e da Saúde, Departamento de Odontologia, Diamantina, Minas Gerais, Brasil.

Universidade Federal dos Vales do Jequitinhonha e Mucuri, Faculdade de Ciências Biológicas e da Saúde, Departamento de Odontologia, Diamantina, Minas Gerais, Brasil. Orcid: 0000-0002-5648-3932

Patricia Gonçalves, Universidade Federal dos Vales do Jequitinhonha e Mucuri, Faculdade de Ciências Biológicas e da Saúde, Departamento de Odontologia, Diamantina, Minas Gerais, Brasil.

Universidade Federal dos Vales do Jequitinhonha e Mucuri, Faculdade de Ciências Biológicas e da Saúde, Departamento de Odontologia, Diamantina, Minas Gerais, Brasil. Orcid: 0000-0002-1782-9654 

Olga Dumont Flecha , Universidade Federal dos Vales do Jequitinhonha e Mucuri, Faculdade de Ciências Biológicas e da Saúde, Departamento de Odontologia, Diamantina, Minas Gerais, Brasil.

Universidade Federal dos Vales do Jequitinhonha e Mucuri, Faculdade de Ciências Biológicas e da Saúde, Departamento de Odontologia, Diamantina, Minas Gerais, Brasil. Orcid: 0000-0002-6999-5398

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