TY - JOUR AU - Mont, M. A. AU - Einhorn, T. A. AU - Sponseller, P. D. AU - Hungerford, D. S. DO - doi:10.1302/0301-620X.80B1.0800056 UR - https://doi.org/10.1302/0301-620X.80B1.0800056 TI - The trapdoor procedure using autogenous cortical and cancellous bone grafts for osteonecrosis of the femoral head T2 - The Journal of Bone & Joint Surgery British Volume VL - 80-B IS - 1 PY - 1998 SP - 56 EP - 62 ER -