• Revision hip arthroplasty
• Paprosky III defect
• custom-made prostheses
• acetabular bone defect

Despite major developments in pelvic surgery in last decades, the management of severe acetabular deficiency at revision arthroplasty, complex primary total hip replacement after post-infective and post-traumatic sequelae or after pelvic tumor resection remains a hard problem. The purpose of the acetabular reconstruction is to obtain a stable, durable fixation of a new socket to re-establish the center of rotation and, if possible, restore bone stock.
Nowadays, thanks to new prosthesis design and materials improvements and the progress of CAD (computer-aided dsign) Systems and 3D printing there is an increasing number of orthopaedic patients having reconstructive and limb-sparing surgery which provides the capacity to restore their “anatomy” and functional abilities as much as possible with better results and fewer complications.
The new frontier of acetabular and pelvic reconstructive surgery are definitely Custom-Made Prostheses as they can match all characteristics previously mentioned.
The purpose of this study has been to compare the data related to the patients treated in the Orthopaedic Department at University Hospital in Pisa (AOUP) from January 2015 to June 2019 to the available results published in literature achieved by the treatment of similar pathologies through the use of custom-made implants and all other kinds of techniques in order to verify their efficacy and efficiency.