Oral and dental health is a component of general health and is also an essential factor in the normal growth of children. Caries affecting infants, toddlers, and pre-schoolers describe a unique pattern of caries lesions called Early Childhood Caries (ECC). The purpose of this study was to describe parents' behaviour in brushing habits of preschool children against early childhood caries. This research is a literature review. The population in this study were 15,231 journals, both national and international, related to the behaviour of parents in brushing their teeth in preschool children against early childhood caries. The sample in this study was 15 journals published in 2015-2020. Based on the review literature on journals, it was found that the knowledge and skills of parents about the habit of brushing teeth, time and frequency of brushing teeth influenced early childhood caries in preschool children. Thus, the school should collaborate with the Puskemas concerning efforts to improve children's oral and dental health, which includes counselling on how to brush teeth properly, when brushing teeth and routine check-ups at the Puskesmas or the dentist.

Islamic boarding schools are social, religious institutions that become educational vehicles for Muslims who desire to investigate the religious sciences; someone accompanies a teacher wherever they go or settle in a cottage to learn science (santri/student at the muslim school). Adolescents at puberty experience growth characterized by physiological and hormonal influences on their physical appearance. Visible changes can affect their behavior, transition period, and health problems, especially in dental and oral health and gingiva. The teeth and mouth are the most crucial hygiene in the human body, becoming a significant problem in adolescent health. The absence of teeth and mouth for gingiva is frequently used as a sign of diseased periodontal tissue. This study was conducted to assess the hormonal impacts of adolescents with poor dental hygiene and gingival diseases. This type of research uses a cross-sectional design. The research sample was conducted on Daar El Fikri Islamic Boarding School adolescents, with as many as 40 people. The measuring instrument uses a questionnaire, the Oral Hygiene Index Simplified (OHI-S), and the Gingival Index. The Spearmant Correlation test carried out data analysis. The results of this student girl at the Muslim school are that the average age of puberty adolescents and experiencing a cycle turns out that oral hygiene is not good and the gingivitis has mild inflammation, this occurs due to hormonal effects.