Fig. 2

Four internal fixation methods were designed: (a) three cannulated compression screws (3CCS) group; (b) three cannulated compression screws (3CCS) + horizontal screw (HS) group; (c) three cannulated compression screws (3CCS) + obstructing screw (OS) group; (d) three cannulated compression screws (3CCS) + medial buttress locking plate (BL) group