Abstract
Objective To determine the characteristics of primary dentition occlusion among Saudi preschool children with autism spectrum disorder ASD and compare it with Saudi preschool children without ASD Methods This study was conducted on a randomly selected sample of year old Saudi preschool children in Riyadh Saudi Arabia The sample consisted of a study group SG of children with ASD and a control group CG of age and gender matched children without ASD Clinical examinations to determine primary molar relationship primary canine relationship overbite overjet posterior crossbite and scissors bite were performed at ASD centers and kindergartens Results Significant differences were found in the occlusal characteristics of the primary dentition between the SG and CG p lt Most children in the SG exhibited a distal step molar relationship a class II canine relationship and increased overjet and overbite Most of the CG children exhibited a flush terminal molar relationship a class I canine relationship normal overbite and overjet The prevalence of posterior cross bite was significantly higher in the SG than the CG p Conclusion The data revealed that the prevalence of malocclusion was higher in Saudi preschool children with ASD than in non ASD preschool children
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