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. 2021 Apr 14;16:257. doi: 10.1186/s13018-021-02416-3

Fig. 2.

Fig. 2

Find the largest screw path. a The largest translucent area resembles an oval shape. b Two computer-aided design screws were placed evenly in the translucent area. Then, the diameters were increased progressively until they reached the borderline of the area