Subluxations are orthopedic injuries treated by orthopedists, with PT, bracing and anti-iflammatories and pain killers - they can be as bad as to need surgery. This is usually a CCL injury (cranial cruciate ligament) or ACL injuries (anterior cruciate ligaments).
In ACL reconstruction, the damaged ligament is usually replaced with a graft taken from another part of the patient's body, such as the patellar tendon or hamstring tendon. Alternatively, a synthetic graft may be used. The goal is to restore the stability of the knee joint, which the ACL helps to maintain. Post-operative care generally involves a rehabilitation program focused on regaining range of motion, strength, and function.
p.s. Not sure how you summoned chiropractors from the response.