Tooth Decay in Children. Tooth decay in children is an occurring health condition. Due to dental issue children miss 52 million hours from school every year. If dental problems are left untreated children will develop further health problems. 30% to 50% of children between 4 and 5 years old already struggle with tooth decay. There are many reason for this problem but a few are due to the fact that dental benefits are not provided though the parents employer.  Some parents fail to acknowledge the important of early dental care for kids. Children of low income families are more predisposed to developing tooth decay and Dental care cost is too expensive for children.