[The prognostic value of the hip screw position in intertrochanteric fractures].

Introduction: In our study, we analyzed one of the Hungarian population's most frequent injuries, the hip fracture, focusing mainly on the lateral femoral neck and the pertrochanteric fractures. According to the classification of the Swiss Association for Ostheosynthesis (AO), we focused on 31-A1 and 31-A2 fractures, the incidence of which increases by ageing.

Method: Between 2010 and 2016, we analyzed the data of 1179 patients. All of the fractures were stabilized with intramedullary nails. 992 patients received Stryker Gamma3, whereas 187 patients' fractures were solved with Synthes PFNA nail. In all cases, closed reduction method was used with fluoroscopy on an extension table. The surgeries were done in general or epidural anesthesia and performed by traumatology residents or specialists using standard lateral exploration. Data were collected using GEPACS software and statistical analysis was done with MS Excel.

Results: Cut-out occurred in 33 cases (2,79%): out of that 21 (1.78%) were left sided and 12 were (1,01%) right sided. 29 (87.87%) patients were treated with Gamma3 nail, and in 4 (12,12%) cases PFNA nail was used. The average TAD-index was 18 mm.

Conclusion: According to recommendations of the TAD-index value, when using dynamic hip screw, it should be 20 mm or lower. The average index value was 18 mm which was equal in the complicated and non-complicated groups. Our study shows that the cut-out is independent from the TAD-index value, thus this recommendation cannot be applied for intramedullary nails. Orv Hetil. 2019; 160(9): 338-342.