tips The use of morselized allografts without impaction and cemented cage support in acetabular revision surgery: a 4- to 9-year follow-up May 22, 2015 Journal of Orthopaedic Surgery and Research 2015, 10:77Â doi:10.1186/s13018-015-0222-8 Huifeng Ding, Yuanqing Mao and Bin Yu contributed equally to this work. Published: 23 May 2015