Avaliação da prevalência do bruxismo infantil e sua relação ... - Unicid

Junqueira, T. H. Evaluation of the prevalence of infantile bruxism and its relationship
with the terminal plan of second deciduous molars [Dissertação de Mestrado]. São
Paulo: Universidade Cidade de São Paulo; 2009.
ABSTRACT
Bruxism is a parafunctional activity of the masticatory system that is characterized by
teeth-clenching or grinding, with rhythmic muscular contractions, being more frequent
during sleep. This research aimed at assessing the prevalence of bruxism in the
deciduous teeth and verifies the association between this parafunctional habit with
the terminal relationship of second deciduous molars. Therefore, 1.011 record cards
from the documentation files of the City University of São Paulo, UNICID, from which
74 record cards were excluded because they did not meet the inclusion criteria.
Therefore, 937 children of both sexes, in the age group between 2 to 6 years, from
six EMEI located in Tatuapé neighborhood, eastern zone of São Paulo, constituted
the sample of this study. The data were collected in the year of 2005 by means of
questionnaires answered by the parents/guardians and clinical exams, performed in
the school environment, to obtain the occlusal characteristics in the antero-posterior
direction. The statistical tests, Student’s-t and Exact Fisher were used, with a 5%
level of significance. In the view of the results, the prevalence of the parafunctional
habit of bruxism was of 29.3% of the total sample and the prevalence with regard to
the terminal relationship of the second deciduous molars was of 17.3% for the mesial
degree, 10.5% for the distal degree and 72.3% for the straight terminal plane. With
regard to the association of bruxism with the type of terminal relationship, significant
results were not found. It was also verified that children who sleep restlessly
presented 2.4 times more chances of having bruxism and the ones with headache,
1.6 times. It could be concluded, established in the results of this research, that the