Abstract: ［Abstract］ Objective〖HTSS〗To explore the effect of different anterior cortical support reduction combined with an antegrade femoral intramedullary fixation on intertrochanteric fractures.
〖WTHZ〗Methods〖HTSS〗A retrospective analysis was performed on 128 patients who met the diagnostic criteria of intertrochanteric fracture.According to the contrastive relationship between the anterior medial cortex of the head and neck bone mass and the anterior medial cortex of the femoral shaft bone mass on the postoperative bilateral orthotopic X-ray, the patients were divided into positive support group(80 cases), neutral support group(23 cases) and negative support group(17 cases). The changes of femoral neck shaft angle and femoral neck length were compared among 3 groups of patients immediately and 3 months after operation, the time of the first time patients underwent weight-bearing,and the differences of Harris scores at 3 and 6 months after operation were compared.
〖WTHZ〗Results〖HTSS〗Femoral neck length and femoral neck shaft angle loss in the negative support group and the neutral support group were greater than that in the positive support group. The first time of weight-bearing was longer than that of the positive support group, the loss of femoral neck length and neck stem angle in the negative support group was more than that in the neutral support group, and the first time of weight-bearing was longer than that in the neutral support group, the difference was statistically significant(P＜0.05). The Harris scores of negative support group and neutral support group were lower than that of positive support group at 3 and 6 months after operation, and the Harris scores of negative support group were lower than that of neutral support group at 3 and 6 months after operation, the difference was statistically significant(P＜0.05).
〖WTHZ〗Conclusion〖HTSS〗Different anterior medial cortical support reduction combined with INTERTAN fixation, the positive and neutral support groups are much better than the negative support group, which can make full contact between the two ends of the fracture, improve the stability of the postoperative fracture, restore the line of force, reduce postoperative complications.

Key words: intertrochanteric fracture, restoration;positive support, INTERTAN, effect