Radiographs of proximal rat femurs after breaking test. (a) Anterior-posterior view (ap-view) of the reversed trochanteric fracture of rat femur (type A3 fracture according to AO classification). (b) Lateral view. (c) The figure shows the microarchitecture (microradiograph of sagittal section) of proximal femur of Sprague-Dawley rat. Please note the fracture line and the content of the trabecular bone in this area.