The goal of this effectiveness trial is to investigate if an integrated dental habituation programme can enhance acceptance of a clinical dental examination in children (aged 5-8 years) with autism spectrum disorder (ASD). The main questions it aims to answer are: * Can a dental habituation programme performed by trained dental hygienists increase the acceptance of a clinical dental examination in children with ASD? * Is a dental habituation programme for children with ASD more effective compared to home preparation using visual aids performed by parents/guardians in increasing the acceptance of a clinical dental examination in children with ASD? The study participants will be randomly assigned to either the habituation group (intervention) or the home preparation group (augmented control) to investigate the effectiveness in increasing acceptance and cooperation of a clinical dental examination.