Idiopathic condylar resorption(ICR) is a disease with progressive condylar resorption of unknown reason,which is presented with diminished condylar head volume, decreased ramus height, clockwise-rotated mandible, and progressive anterior openbite. This disease results in the inharmony profile of skeletal Class Ⅱ relationship with high mandibular plane angle. This article reviews the progress on etiology, mechanics, diagnosis, and treatment of ICR in recent years.
