4Rosenblum SF, Zuckerman JD, Kummer FJ, et al. A biomechanical evaluation of the Gamma nail. J Bone Joint Surg Br, 1992, 74: 352-357.
5Baumgaetrner MR, Curtin SL, Lindskog DM, et al. The value of the tip-apex distance in predicting failure of fixation of peritrochanteric fractures of the hip. J Bone Joint Surg Am, 1995, 77: 1058-1064.
6Szpalski M, Descamps PY, Hayez JP, et al. Prevention of hip lag screw cut-out by cement augmentation: description of a new tech- nique and preliminary clinical results. J Orthop Trauma, 2004, 18: 34-40.
7Geller JA, Saifi C, Morrison TA, et al. Tip-apex distance of in- tramedullary devices as a predictor of cut-out failure in the treatment of peritrochanteric elderly hip fractures. Int Orthop, 2010, 34: 719-722.
