Patella resection

The metatarsal bones can increase strength when they extend the knee, and have a protective effect on the front of the femur. They should be retained as much as possible. Only when the tumor of the sacrum, severely damaged sacral tuberculosis, comminuted sacrum fracture, malunion, articular surface unevenness, and severe sacral softening are removed in order to prevent the occurrence and deterioration of osteoarthritis.

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