Patients with pain in both knee joints accounted for 75.2%; limited movement of the knee joint accounts for 88.4%; joint leakage: 78.8%, joint pain when walking: 78%, scratching the joints: 94%; signs of wood shavings: 65.2%; bone headache at examination 52.4%; according to Lequesne classification, there were 72.4% of patients with severe injury or more.