Patella fracture

The sacrum is an important part of the knee joint and is the largest sesamoid bone in the human body. During knee extension, the sacrum can increase the strength of the quadriceps muscle by about 30% through leverage, especially when the last 10deg; ~ 15deg of the knee is straightened. The role of the sacrum is more important. If the sacrum fracture is not handled properly, it will seriously affect the movement of the knee joint and even cause lifelong disability. After patella resection can lead to permanent knee function limitation, weakened knee extension, and can cause quadriceps atrophy. Therefore, the integrity of the sacrum should be preserved as much as possible after the sacrum fracture. Resection of the sacrum is not recommended. The patellar-femoral joint is formed in front of the patella and the inner and outer femoral condyles. After a patella fracture, the joint surface should be restored as much as possible to reduce the incidence of traumatic patellofemoral arthritis.