关键词: 牙根吸收, 无托槽隐形矫治, 并发症, 影响因素

Abstract: Root resorption is a common complication in orthodontics. Clear aligner treatment is a new developed orthodontic technique in which the appliance material used and the manner and size of the force applied to the teeth are different from the fixed orthodontic treatment. Most clinical studies have shown that clear aligner treatment has less effect on root resorption. In this paper，the principles and technology of aligners，and the incidence，severity and influencing factors of root resorption during orthodontic treatment are reviewed.

Key words: root resorption, aligners, complications, influencing factors