Rehabilitation after fracture of the knee region Fractures of the knee region include supracondylar fracture of the femur, fracture of the femoral condyle, fracture of the tibial plateau, patellar fracture, etc. These fractures often damage the joint surface, cause adhesions inside and outside the joint, and impair the mobility of the joint. According to the different periods of the patient’s fracture, targeted rehabilitation is performed: 1. After orthopedic clinical management, the patient elevates the affected limb and fixes the knee joint in a functional position. for about 1 week, the patient begins to perform patient ankle and toe active movement exercises in bed with isometric contraction of the quadriceps. 2. In the second to third week, hip flexion and extension exercises are feasible with external fixation of the knee joint. In patients with solid internal fixation, CPM treatment is feasible to prevent joint contracture adhesions and to help repair the joint surface. At the same time, for patients whose stitches have been removed, physiotherapy such as wax therapy can be applied to the affected area. 3. From the 4th to 6th week, the external fixation can be removed and active knee flexion and extension activities, resistance exercises for knee flexion and extension muscles, and non-weight bearing standing and walking exercises for the knee joint can be performed. 4. From the 7th to the 12th week, partial weight-bearing and full weight-bearing standing and walking exercises with the support of parallel bars, walkers, double or single crutches, active and passive joint mobility exercises of the knee joint, functional joint traction, and resistance exercises of the quadriceps muscle will be performed gradually. 5. Each treatment was performed twice daily for 30 to 60 minutes each time. The results of 67 patients were evaluated for rehabilitation 3 months after the injury. 42 patients had active knee function of 120° or more in flexion, 0° in active extension, and 135° to 160° in passive flexion, and knee function basically returned to normal. 5 patients had knee pain when walking or squatting, and knee function recovered well. 17 patients had active knee flexion of 90° to 120°, active extension of 0°, and passive flexion of 95° to 145°. Passive flexion ranged from 95° to 145°, walking function was basically normal, and knee function recovered well. In 15 of these patients, after 1 to 2 months of continued rehabilitation, the knee function recovered well. 8 patients had 45° to 85° of active knee flexion and 60° to 110° of passive knee flexion, and the knee function was limited. A total of 10 patients were treated with arthrodesis in the Department of Orthopedics. Discussion Fractures in the knee region are very likely to damage the joint surface and cause functional impairment of the knee joint. Early intervention in rehabilitation, gradual exercise exercises and persistent functional exercises can prevent and reduce knee joint dysfunction. Early intervention in post-fracture rehabilitation is necessary and effective, and early rehabilitation is important to prevent dysfunction. Elevation of the affected limb helps to reduce swelling, and fixation of the affected limb in a functional position prevents joint deformity contracture; isometric contraction of the quadriceps muscle facilitates blood circulation and lymphatic flow around the knee joint, promoting the absorption of hematoma and exudate and the reduction of swelling; stress stimulation of the fracture area promotes the growth of bone scabs. CPM is effective in preventing joint contractures and scar adhesions and in promoting fracture healing. There are many physical therapies used for post-fracture rehabilitation, including heat therapy, which can promote blood circulation and facilitate swelling reduction and tissue recovery, such as wax therapy, which has a long-lasting thermal effect, while the mechanical contraction of wax cooling produces a compressive effect on tissues, helping to reduce swelling and soften scarring; medium-frequency pulsed electrical therapy can prevent muscle atrophy; low-frequency pulsed electromagnetic field has a certain effect on promoting the healing of fractures. Transcutaneous electrical nerve stimulation can treat pain, etc. In the treatment, the appropriate method can be chosen according to the patient’s specific situation. The prognosis of fractures in the knee region is related to the degree of injury, the time of rehabilitation intervention, the presence of osteoporosis, and the motivation of the patient to practice. Fractures of the tibial plateau are often collapsed, resulting in decreased joint stability and easy recompression and collapse after repositioning, and the tibial plateau is cancellous bone, so weight-bearing of the affected limb should not be started too early, but only when the fracture heals more solidly. In patients with partial or total patellar resection, there is no fracture healing problem and the rehabilitation process can be advanced. The earlier the rehabilitation intervention, the less contracture and stiffness will occur in the knee joint, which can have a multiplier effect on the later rehabilitation. Patients with fractures with osteoporosis have delayed or non-healing bone healing, which leads to a slow rehabilitation process and affects the functional recovery of the knee joint. The motivation and participation of patients in exercises is also an important factor affecting the prognosis. Good cooperation of the patient and family members to actively perform active exercises of the joint will help the recovery of the function and muscle strength of the joint.