**2. TMJ indication for joint reconstruction**

Patients with TMJ pathology and concomitant DFD may show typical TMJ symptoms (limited jaw movement, presence of TMJ pain, occlusal disturbance). Nevertheless, a second group of patients exhibit clinically asymptomatic TMJ, where the impact on DFD is only revealed by imaging methods [1, 3]. In these patients, the condition of the TMJ represents a potential risk to the long-term stability of the outcome of orthognathic surgery in the event of progressing TMJ pathology. The question is whether to choose preventive TMJ reconstruction in these patients or to address the condition of the joint by other methods [3]. This problem is especially evident in the diagnosis of idiopathic condylar resorption (ICR), where some authors prefer stabilizing the joint (bite guards, drug therapy, TMJ open surgery) or performing preventive TMJ reconstruction [8–10].
