Fig. 2

PSI guide plate design. Three Kirschner wire fixation sleeves (No.1, No.2, No.3) to stably fix the guide (d-1, 2, 3); Two cutting slots including horizontal osteotomy groove (d-4) and ascending anterior osteotomy groove (d-5); Pressing point 1 (b, d-7); Pressing point 2 (d-6); A wedge-shaped filling block designed independently (c); The shape of the wedge-shaped filling block was the same as target gap (a); A limited deep ear (c-9), the height of gap and direction marker (c-10) on the wedge-shaped filling block