A 48-year-old woman complains about aching dull pain in the region of the left TJM, that is getting worse during eating solid food. The pain appeared about 2,5 years ago. Objectively: mouth opening is limited, there is sideward deviation of jaw during mouth opening, TMJ is clicking. Examination of the oral cavity revealed secondary partial adentia. X-ray picture shows sclerosis of the cortical plate of articulat head and narrowing of cartilage space. What is the most likely diagnosis?