American Board of Orthodontics (ABO) Practice Exam 2026 - Free Orthodontics Practice Questions and Study Guide

The increase in intercanine dimension attributed to the natural migration of teeth is often reported to be around 1.5mm. This phenomenon occurs as teeth shift slightly in response to changes in occlusion and as a result of physiological movements. During orthodontic treatment or even in the absence of it, the interconnected nature of the dental arch allows for minor adjustments in tooth positions that can lead to this increase.

Understanding this measurement is significant in orthodontic diagnosis and treatment planning, as it can influence space management and the alignment of the dental arch. The increase due to migration reflects the complex interplay of biological factors in tooth movement, including periodontal health and the presence of surrounding dental structures. Therefore, recognizing that 1.5mm is a reasonable estimate aids dental professionals in anticipating changes in tooth positioning and planning necessary interventions accordingly.