Oral habits are common in children. These habits include: non-nutritive sucking habits (thumb, finger and pacifier sucking habits), tongue-thrusting, tongue sucking and lip or nail biting habits.The majority of oral habits are called non-nutritive sucking habits. Early in life mostchildren engage in thumb-sucking or other non-nutritive sucking habits.Digital sucking is considered natural in infancy and almost 100% of children engagein this habit within the first year (Kravitz & Boehm, 1971).Near the end of early childhood and the beginning of grade school, any prolongedoral habit is...