The sequelae of patellar dislocation surgery are mainly the following: First, persistent unrelieved peripheral pain, such as persistent peripheral pain due to ligamentous strain or chronic injury. Second, poor knee motion, inability to reach a normal position in flexion and extension, resulting in changes in joint mobility. Third, the change in the position of the patella causes chondromalacia patellae or chondromalacia patellae, which can cause pain in the front of the patella and lead to impaired knee movement.