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Fig. 2 | BMC Surgery

Fig. 2

From: Fracture classification and coronal plane position of bolt may affect the prognosis after femoral neck system (FNS) surgery for femoral neck fractures

Fig. 2

Coronal plane position of the FNS bolt. Coronal section of the femoral neck is subdivided into three sections, designated as the upper, middle, and lower thirds. L-n The line serves as a reference line for the femoral head-neck axis; L-cn A reference line is established through the femoral calcar, which is parallel to the femoral head-neck central axis; L-sn A reference line is established parallel to the femoral head-neck central axis through the upper edge of the femoral neck. The region between L-cn and sn is subdivided into upper, middle, and lower thirds, with the subdivision occurring in a direction perpendicular to L-n

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BMC Surgery

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