Table 1 The criteria for non-anatomical reduction and poor internal fixation

1

Diastasis between the base of the first and second metatarsals >2 mm

Placement of implantation is inappropriate

2

Angulation of the first metatarsal with the talus > 15°

Exposed part of the screw is >30%

3

Fracture fragment displacement is >1 mm

Screw penetrates into articular cavity or through articular surface