Morphological changes in idiopathic condylar resorption with different degrees of bone loss Publication date: Available online 6 June 2019 Source: Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology Author(s): Yifan He, Han Lin, Qiuping Lin, Lin Lu, Mingyu Li, Qianli Li, Jingyi Xue, Yue Xu Abstract Objective The aim of this case control study was to investigate sizes, shapes, and angles of condyles exhibiting idiopathic condylar resorption (ICR) with different degrees of condylar bone loss, and to provide additional information for the diagnosis of ICR. Study Design In total, 154 condyles from ICR patients and 42 healthy condyles were included. The ICR group was further divided into three subgroups (ICR I, ICR II, and ICR III) based on the morphology of the condyle. 3D models of the condyles were measured and analyzed using the Mimics software based on cone beam computed tomography (CBCT) data. Results The condylar anteroposterior diameter, transverse diameter, height, superficial area, volume, articular surface angles, condylar neck angle, maximal sectional area, and condylar neck sectional area were all significantly different in the ICR group compared with the control group (P < 0.05). There were also significant differences among the three subgroups in many of these parameters (P < 0.05). Conclusions Morphologic changes in ICR become worse as the disease progresses, with significant differences between diseased and normal condyles. Many changes were significant between the subgroups. Posteriorly inclined condylar neck and slender condylar neck may be associated with ICR.