To compare the effect of repair of deltoid ligament rupture with posterior external rotation (SER) IV and pronation external rotation (PER) IV fractures of ankle joint.

A total of 68 patients in the hospital from January 2016 to January 2018 who met the inclusion criteria (SER IV or PER IV ankle fractures, deltoid ligament rupture, followed up for more than one year) and exclusion criteria (age≥70 years, old ankle injury, medial ankle fractures, fractures of other parts of ipsilateral lower limb, open fractures, unable to cooperate with functional exercise, pathological fracture) were divided into SER group (47 patients) and PER group (21 patients). The Armerican Orthopedic Foot & Ankle Society (AOFAS) score and quality of life (QOL) score of the two groups were evaluated one year after surgery, and the difference between the two groups was compared using t-test.

The ankle function recovery (t=8.314, P<0.05) and physical health (t=0.766, P<0.05) of the SER group were better than those of the PER group, but the mental health of the 2 groups were basically the same (t=0.452, P>0.05). After comparing the total score of SF-36, there was no significant difference in the QOL between the two groups (t=0.172, P>0.05).

After deltoid ligament repair, the ankle function recovery, physical component summary of patients with SER IV fractures are better than those of PER IV patients. However, the mental health QOL and overall QOL are basically the same.