Abstract:Objective To compare the efficacy of antiskid steel plate and cannulated compression screw in the treatment of ankle fractures with posterior malleolus fragments of Lauge-Hansen supination external rotation type Ⅲ and type Ⅳ and pronation external rotation type Ⅳ.Methods Sixty patients with severe ankle fractures with posterior malleolus Plion fracture treated from November 2016 to January 2020 were selected and divided into anti-skid steel plate group and cannulated compression screw group according to different posterior malleolus fixation strategies ( n=30,each).The operation time,fracture healing time,complication rate and recovery of ankle joint function were compared between two groups.Results The operating time in anti-skid steel plate group was significantly longer than that in cannulated compression screw group［(129.47±12.23）min vs （121.33±17.32）min, t=2.103, P<0.05)］.There were no statistical differences in fracture healing time,ankle function score and postoperative complications (ankle swelling,tension blister,incision dehiscence) 6 months after surgery between two groups( P>0.05).Conclusion In the treatment of ankle fractures with posterior malleolus fracture of Lauge-Hansen supination external rotation type Ⅲ and type Ⅳ and pronation external rotation type Ⅳ,both anti-skid steel plate and cannulated compression screw can achieve the ideal treatment effect,and plate fixation is recommended for comminuted and large posterior malleolus fractures.