Abstract: Condylar idiopathic absorption (ICR) is a disease characterized with progressive condylar absorption, and its reason is not clear. ICR can lead to reduced condylar volume, decreased ramus height, mandible clockwise, anterior open bite and a discordant face type of skeletal classⅡ malocclusion, which seriously affects the maxillofacial appearance function. The article starts from the etiology of condylar idiopathic absorption and focuses on the relationship between anterior disc displacement（ADD） and ICR，so as to provide strong biomedical evidence for clinical treatment of such diseases.

Key words: anterior disc displacement, correlation