The most common type of malocclusion in children is crowding of teeth due to insufficient space in the dental arches for proper alignment. This results from a discrepancy between tooth size and jaw size during growth, leading to overlapping or rotation of teeth. Unlike spacing, which indicates excess space, crowding frequently causes functional and aesthetic concerns in mixed and permanent dentitions. Early identification and management are crucial to guide proper occlusion and reduce the need for extensive orthodontic intervention later.

Reference: Wheeler’s Dental Anatomy, Physiology and Occlusion, 10th Edition.