Knee joint deformation is mostly seen in fracture deformity healing, osteoarthritis, dysplasia, etc., leading to changes in the anatomy of the knee joint, generally cannot be restored, and may require surgical treatment. 1. Osteoarthritis: Osteoarthritis of the knee joint can cause cartilage damage, osteophytes, knee joint deformation, conservative treatment is difficult to recover, surgical treatment is mostly replacement of artificial prostheses to restore joint function. 2. Deformed healing of fracture: after trauma caused femur and tibia fracture, the broken end of the fracture is displaced in the process of fracture healing, resulting in deformed healing, and deformation of the knee joint will also occur because the fracture has already healed, so it can’t be restored. 3. Dysplasia: Deformation of the knee joint due to abnormal development can not be restored because the deformity of the knee joint has already been formed. When symptoms such as knee pain and deformity occur, it is recommended to consult a doctor in time.