Abstract

NAHAS-SCOCATE, Ana Carla Raphaelli; TREVISAN, Shirley; JUNQUEIRA, Tatiana Helena  and  FUZIY, Acácio. Association between infantile bruxism and the anteroposterior relationship of the dental arches. Rev. Assoc. Paul. Cir. Dent. [online]. 2012, vol.66, n.1, pp. 18-23. ISSN 0004-5276.

The aim of this study was to analyse the association between the bruxism and the anteroposterior relationship of the dental arches in complete primary dentition. The sample comprised 937 children of both genders, aged from 2 to 6 years old, who attended municipal preschools in the eastern zone of São Paulo city. The information related to the bruxism was investigated by means of questionnaires filled out by parents/guardians. The occlusal characteristics corresponding to the terminal relationships of the primary second molars and the relationships of the canines were performed by the examiners, in the school environment. According to the results, among the total sample, 29.3% of children had bruxism. Considering the right side, as both sides didn't show statistical difference, 15.4% of children presented mesial step terminal relationship, 12.5% distal step and 72.1% vertical plane. For the canine relationship, 49.6% presented Class 1, 45.5% Class 2, and 4.9% Class 3. The association between bruxism and the anteroposterior relationship of dental arches was not significant. It was verified that children who slept restlessly (OR= 2.4) and suffering from headaches (OR= 1.6) showed more chances of expressing the bruxism.

Keywords : malocclusion; bruxism; epidemiology.