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Fig. 4 | BMC Musculoskeletal Disorders

Fig. 4

From: How to get better TAD? Relationship between anteversion angle of nail and position of femoral neck guide pin during nailing of intertrochanteric fractures

Fig. 4

A typical case to regulate the PSA and anteversion angle to obtain ideal TAD. a-b, preoperative anteroposterior (a) and lateral (b) X-ray to diagnose intertaochanteric fractures; c-f, the adjustment of the guide pin. When position of neck guide pin is higher (the PSA is larger, c) than normal and anteversion angle is less than normal (d), we need to deepen the nail and externally rotate it to make antevertion angle bigger (f) (at the same time, the PSA will increase in AP view, e) to get better TAD; g-h, postoperative anteroposterior (g) and lateral (h) X-ray to confirm the fracture reduction. Green line, nail position; red line, current position; yellow, ideal position

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