A 75-year-old female sustains a fall and presents with severe hip pain. Radiographs reveal a fracture of the femoral neck where the femoral head is completely displaced from the femoral neck, with no trabecular continuity between the head and the acetabulum, and the head is lying free in the acetabulum. This fracture is best classified as Garden's type:

Explanation

Garden's classification is based on the degree of displacement and impaction of the fracture fragments, which correlates with the risk of avascular necrosis and non-union. * **Type I:** Incomplete fracture, valgus impacted. * **Type II:** Complete fracture, non-displaced. * **Type III:** Complete fracture, partially displaced (varus displacement, some trabecular continuity). * **Type IV:** Complete fracture, completely displaced, with no trabecular continuity between the head and the acetabulum. The head is often lying free in the acetabulum. This type carries the highest risk of avascular necrosis.