Kristan A, et al. - A retrospective study was conducted to ascertain which radiological parameter after fixation of trochanteric fractures type AO 31 A2 is most important for the position of the fracture after six months. Researchers further assessed how the end position influences mechanical failure and the mobility of the patients. Researchers examined 92 patients operated on a one-year period for A 2 type trochanteric fractures with a sliding hip screw or proximal femur intramedullary nail. Individuals were classified into two groups according to the radiological position of the proximal fragment six months after the surgery. The outcomes of this study revealed that trochanteric fracture reduction in lateral view is the most important prognostic factor for favourable radiological result after half a year. After six months, the unsatisfactory position of the proximal fragment affects mechanical failures and walking ability.