Novel Passive Two-Stage Magnetic Targeting Devices for Distal Locking of Interlocking Nails

Figure 14

The two-stage targeting test on a transparent model bone. (a) A transparent model bone and a commercial interlocking nail with a positioning magnet fixed on the screw hole. (b) The 1st-stage targeting process. (c) The 2nd-stage targeting process in a misaligned state with red LED on. (d) The 2nd-stage targeting process in an aligned state with green LED on. (e) The paper barrier is moved away. Laser light successfully passes through the transparent model bone and the screw hole to the mirror to verify the success of the two-stage targeting process.

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