The prevalence of malocclusion is reported to be higher among physically and/or mentally disabled children compared to healthy children [ 10].
Otherwise, no data about changes in mandibular arch angulation in untreated unilateral crossbite malocclusion were reported in previous studies.
In one study [ 5] involving 108 children, a significant association between children who were bottle fed and presence of anteroposterior malocclusion was reported.
This malocclusion has been reported sporadically in AI of different genetic causes, and the underlying mechanisms remain unknown.
Accordingly, this malocclusion is classified as peripheral factor influencing bruxism [ 2].
Furthermore, the most frequent type of dyslalias in children with this malocclusion is also unknown.
It seems that treatment of class II malocclusions with any of the treatment strategies generally produces similar root resorption and the amount is similar to what is reported for orthodontic treatment of other types of malocclusions.
The esthetic and anatomic components of malocclusion are included in both the DAI and the IOTN [ 39], but the IOTN is reported to be more precise [ 37].
An increase in overjet 3 years after successfully treated Class II malocclusion also was reported for the twin block appliance[28].
Prevalence of AOB in children and adolescents from Envigado, Colombia, and the most frequent type of dyslalias in children with this malocclusion are unknown.
