Pertrochanteric fractures are, with great different from others, the most usual and important surgical fragile fractures in our society. We expose the importance of a possible prediction factor in the good outcome of a pertrochanteric fracture treated with dynamic cephalic screw.

Patients and Method: We have done a retrospective study of 100 pertrochanteric fractures treated in Hospital 9 de Octubre with Gamma and Trigen Intertan locking nail. We have collected the type of fracture (depending on its stability), its epidemiology (gender, site, age, cause and concomitant illnesses), the reduction achieved, and the position of the tip of the cephalic screw (using the so called Tip-apex distance and the Cleveland squares). We have also studied possible correlations between the result and both, the reduction and position of the tip.

Results: The percentage of reductions were 85% excellent, and 15% good. The average of the tip-apex distance was 15mm of average, and the most frequent position of the cephalic screw into the femoral head was inferior-center. The clinical results were excellent in 90% of patients and good in 7%, with a 3% of follow up lost because of different circumstances.

Conclusion: The intraoperative assessment of the reduction achieved with the tip-apex distance, as well as the Cleveland squares, are good prediction factors to help the surgeon to anticipate the real possibilities of an excellent, good, or poor result of the fracture treatment. The clinical situation of the different patients must be taken into account in order to assess correctly the clinical result.