Prevalence of bruxism in undergraduate students.
OBJECTIVE
The aim of this study was to determine the prevalence of bruxism in students at the Federal University of the Jequitinhonha and Mucuri Valleys in Brazil. The secondary objectives were to identify the factors associated with bruxism; prevalence of dental wear; and to distinguish the signs and symptoms of temporomandibular dysfunction when present, and verify its relationship with bruxism.


METHODS
Two hundred fifty-three students (106 males, 147 females) were clinically examined and answered a questionnaire. Trained researchers performed the dental wear evaluation. The incisal edge and occlusal surface were classified as follows: no wear, wear into enamel, wear into dentin, and extensive wear into dentin. Demographic data and factors related to bruxism were obtained by a questionnaire. The participants who presented dental wear and habit of clenching/grinding teeth were classified as bruxers. The data were analyzed by the SPSS program (p < 0.05).


RESULTS
The results showed that 31.6% of the students had bruxism. Of the 7084 teeth evaluated, 376 (5.3%) had some type of facet wear. The teeth that had the highest prevalence of wear facets were the canines. Stress, muscle pain, temporomandibular joint (TMJ) pain, and TMJ noise were significantly associated with bruxism (p < 0.001).


CONCLUSIONS
The prevalence of bruxism was 31.6% in this population. The factors most associated with bruxism were stress, muscle pain, TMJ pain, and TMJ noise.
a Department of Dentistry, Faculty of Biologic Sciences and Health , Federal University of Jequitinhonha and Mucuri Valleys , Diamantina , Brazil.
Luana Goés
LG
Soares
a Department of Dentistry, Faculty of Biologic Sciences and Health , Federal University of Jequitinhonha and Mucuri Valleys , Diamantina , Brazil.
Igor Reali
http://orcid.org/0000-0002-2530-7098
IR
Costa
a Department of Dentistry, Faculty of Biologic Sciences and Health , Federal University of Jequitinhonha and Mucuri Valleys , Diamantina , Brazil.
Jadimar Dos Santos
JDS
Brum Júnior
a Department of Dentistry, Faculty of Biologic Sciences and Health , Federal University of Jequitinhonha and Mucuri Valleys , Diamantina , Brazil.
Wyllerson Silveira Bronzon
WSB
Cerqueira
a Department of Dentistry, Faculty of Biologic Sciences and Health , Federal University of Jequitinhonha and Mucuri Valleys , Diamantina , Brazil.
Evandro Silveira de
ES
Oliveira
b Department of Periodontology , Faculty of Dentistry, Federal University of Minas Gerais , Belo Horizonte , Brazil.
Dhelfeson Willya
http://orcid.org/0000-0002-8628-3122
DW
Douglas de Oliveira
a Department of Dentistry, Faculty of Biologic Sciences and Health , Federal University of Jequitinhonha and Mucuri Valleys , Diamantina , Brazil.
Patricia Furtado
PF
Gonçalves
a Department of Dentistry, Faculty of Biologic Sciences and Health , Federal University of Jequitinhonha and Mucuri Valleys , Diamantina , Brazil.
José Cristiano Ramos
http://orcid.org/0000-0002-7991-1012
JCR
Glória
a Department of Dentistry, Faculty of Biologic Sciences and Health , Federal University of Jequitinhonha and Mucuri Valleys , Diamantina , Brazil.
Karine Tais Aguiar
KTA
Tavano
a Department of Dentistry, Faculty of Biologic Sciences and Health , Federal University of Jequitinhonha and Mucuri Valleys , Diamantina , Brazil.
Olga Dumont
OD
Flecha
D000293:Adolescent; D000328:Adult; D001938:Brazil / Q000453:epidemiology; D002012:Bruxism / Q000150:complications / Q000453:epidemiology* / Q000523:psychology; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D008297:Male; D063806:Myalgia / Q000150:complications; D015995:Prevalence; D013315:Stress, Psychological / Q000150:complications; D013334:Students / Q000523:psychology / Q000706:statistics & numerical data*; D013705:Temporomandibular Joint Disorders / Q000150:complications; D055815:Young Adult
Bruxism; dental wear facets; prevalence; psychological stress; temporomandibular disorders; temporomandibular joint dysfunction