Liyan Liu, Jie Zhang, Tian Wei and Chunmiao Jiang*
External Apical Root Resorption (EARR) is a common and unpredictable complication of orthodontic treatment. The occurrence of root resorption can aggravate the ratio between the crown and root, reduce tooth stability, and potentially lead to tooth loosening or loss. EARR caused by orthodontic treatment cannot be completely prevented, and its high incidence has garnered significant attention from orthodontists worldwide. Typically asymptomatic, root resorption is primarily detected through imaging, which can be regularly performed if necessary to identify and mitigate its progression early on. Apical radiography, panoramic radiography, and Cone Beam Computed Tomography (CBCT) are commonly utilized to assess the severity of EARR, with quantitative indicators such as root length, resorption area, and volume. This review summarizes the common indicators and methods for measuring EARR, aiming to provide a comprehensive perspective on its evaluation.
Published Date: 2026-02-24; Received Date: 2024-12-23