Root Resorption in Orthodontics

Localized root resorption is a normal and constant remodeling response to oral microtrauma occurring throughout the life. Roots do not shorten naturally unless excessive force compresses the periodontal ligament. Appositional process of root repair normally repairs the resorptive defects of the root. Excessive force causes irreversible root resorption, which results in shortening of the root length. Extensive root resorption observed after orthodontic treatment compromises the benefits of an otherwise successful orthodontic outcome. However, loss of root structure resulting from orthodontic treatment does not decrease the longevity or the functional efficiency of the teeth.