Complex primary hips for total hip replacement surgery at a tertiary institution in Nigeria Udo Ego Anyaehie, Gabriel Okey Eyichukwu, Cajetan Uwatoronye Nwadinigwe and Amechi Uchenna Katchy SICOT-J, 4 (2018) 22 Published online: 12 June 2018 DOI: 10.1051/sicotj/2018026