Page 20 - Portuguese Journal - SPORL - Vol 61. Nº1
P. 20
P-value=0.34), or grade of tonsillar hypertrophy study, the prevalence of bruxism among
(one-way ANOVA test; P-value=0.08). children with OSRBD and the impact of
Seventeen of the 22 children (77%) with adenotonsillectomy on its improvement or
bruxism before surgery improved after resolution were evaluated. The condition’s
surgery and only five children (23%) still had prevalence decreased from 40.7% to 9.3% after
complaints (Figure 2). surgery.
The main limitations of the present study
Figure 2 are that it was a retrospective study with a
Bruxism after surgery small sample, lacked multivariate analysis,
and the fact that the diagnosis of bruxism
was only clinical without electrophysiological
monitoring.
However, our results are in line with those
of other authors (Table 2). DiFrancesco et
al. (2004) conducted a prospective study in
which 69 patients with tonsillar hypertrophy
and OSAS, aged between two and 12 years
were evaluated. Before the surgery, 45.6% of
the children with OSAS had bruxism, whereas
after the surgery only 11.8% of them still had
it. Ali Eftekharian et al . (2007) conducted a
5
prospective study in which 140 children with
symptoms associated with adenotonsillar
hypertrophy, aged between four and 12 years
The prevalence of pre-surgery bruxism were evaluated. They were assessed through
was 40.7%, which decreased to 9.3% after a questionnaire before adenoid and tonsil
tonsillectomy (Figure 3). There was a statistically removal and two months after it; 25.7% had
significant difference in the prevalence of bruxism before the surgery and only 7.1% still
bruxism before and after surgery (Pearson’s had it after the intervention. 4
chi-square test, P-value=0.0015). Oh et al. (2021) identified the structural and
functional craniofacial characteristics that
Figure 3 were associated with a higher prevalence
Prevalence of bruxism before and after surgery of bruxism. They conducted a study with 96
children, aged between six and 12 years, and
investigated the association of bruxism with
tonsillar hypertrophy, mouth breathing, and
restricted tongue mobility, analyzing each risk
factor in isolation as well as the three factors
in combination. The results showed that 56%
of the 25 children with tonsillar hypertrophy
had bruxism and 50% of the 30 children with
nasal obstruction while mouth breathing had
Discussion the condition. 8
One of the main causes of OSRBD is tonsillar Valera et al. (2003) identified muscle,
hypertrophy, for which adenotonsillectomy is the functional, teeth, and skeletal changes in
main treatment; with several studies indicating children aged between three and six years with
6
an association between adenotonsillectomy adenotonsillar hypertrophy. In this study, the
and bruxism improvement. In the present prevalence of bruxism was 43.2% in the group
20 Portuguese Journal of Otorhinolaryngology - Head and Neck Surgery
