Authors examine the case report of pertrochanteric femoral fractures treated with the D.H.S. screw plate at 135° in three years (from june 1987 to august 1990) at the Istituto Ortopedico Galeazzi of Milan. During this period of time 92 patients have been operated, and 38 have been clinically controlled with mid follow-up of 54 months. Authors describe characteristics of this synthesis means comparing it with others (Thorton nail-plate, Ender nails, etc.) commonly used. Finally, they compare the obtained results with those mentioned in literature.