Abstract:

BACKGROUND: The intramedullary and extramedullary fixations are two main surgical treatment methods for intertrochanteric fractures, each method has the advantages and disadvantages.
OBJECTIVE: To investigate the different effect of dynamic hip screw and the new generation of the femur proximal femoral nail (InterTan) in the treatment of different sub-type of intertrochanteric fractures.
METHODS: A series of 84 cases of intertrochanteric fractures were fixed by dynamic hip screw and InterTan during July 2010 to December 2011. According to Evans classification, 43 patients of type Ⅰa and type Ⅰb were treated with dynamic hip screw, and 41 patients of type Ⅰc and type Ⅰd were treated with InterTan nails．
RESULTS AND CONCLUSION: Eighty-four patients were followed-up for an average of 11.6 months, all patients were fracture healing. There was no significant difference in healing time, get out of bed time and the last follow-up Harris hip score between two groups (P > 0.05). The last follow-up Harris hip score in the dynamic hip screw group was (87.7±9.3) points, and the excellent and good rate was 83.7%; The last follow-up Harris score in the InterTan group was (85.9±8.6) points, the excellent and good rate was 90.2%. There was no significant difference of last follow-up Harris hip score between two groups (P > 0.05). During the choice of internal fixation materials, patients with Evans type Ⅰa and type Ⅰb should be treated with dynamic hip screw, and the patients with Evans type Ⅰc and type Ⅰd should be treated with InterTan nail. Both dynamic hip screw and InterTan have a positive effect and the effect is similar.