Recurrent patella dislocation

During knee flexion and extension, the sacrum moves up and down in the front block of the lower end of the femur. Due to the anatomical structure of the sacrum, the quadriceps femoris and the joint capsule keep the movement stable. The center of the sacrum articular surface is a longitudinal ridge-shaped protrusion, which coincides with the corresponding articular surface of the lower end of the femur, preventing the sacrum from sliding left and right. The quadriceps contraction is mainly the quadriceps pulling effect, which prevents the patella from dislocating outward. The tension of the joint capsule also stabilizes the patella during muscle contraction, but it can cause recurrence due to trauma and congenital or acquired pathological factors of the knee joint. Dislocation of the patella.

The material in this site is intended to be of general informational use and is not intended to constitute medical advice, probable diagnosis, or recommended treatments.