Root resorption is one of the most serious problems associated with dentistry, since it has not spared any discipline of dentistry and orthodontics is no exception. It is believed that too strong forces during orthodontic tooth movement will cause increased damage to the engaged tissues. Loss of apical root material is unpredictable and when extending to dentine is irreversible. Histological studies report a high incidence, whereas clinical studies reveal a more varied incidence.
Key words: Root resorption, Orthodontic treatment, Orthodontic forces, Apical root resorption.