Case 1. (a–c) This 15-year-old girl has active idiopathic condylar resorption. Notice the significantly retruded position of the mandible, high mandibular plane angle, and associated facial morphology. The presurgical occlusion demonstrates anterior open bite and a class II end-on cuspid occlusal relationship. (d–f) The same patient 3 years after surgical treatment of idiopathic condylar resorption with removal of hyperplastic synovial tissues, articular disc repositioning, and simultaneous double-jaw orthognathic surgery, demonstrating excellent stability.