3D Printed Cups for Acetabular Reconstruction: a 3D-CT Implant Study

DI LAURA, ANNA; HENCKEL, JOHANN; BELZUNCE, MARTIN A.; HART, ALISTER J.

London

Simposio; The Hamlyn Symposium on Medical Robotics 2022; 2022

Hamlyn Symposium on Medical Robotics 2022, The Imperial College

Custom 3D printed titanium acetabular implants have only recently been introduced and enable surgeons to treat traditionally unreconstructable massive acetabular defects. Whilst there is an accepted threshold for implant migration (proximal translation of >1 mm within 2 years) that constitutes loosening in primary and revision uncemented hip implants, there is no reference threshold for custom acetabular implants used to treat massive defects, with no long-term outcome studies [1]. Aim: We performed bone-to-bone registration of sequential CT imaging with the aim to help define radiological loosening of custom-made three- dimensionally 3D printed trabecular titanium cups for the management of massive acetabular defects. Objectives: Our primary and secondary objectives were to assess implant position and orientation 1-year post surgery in comparison with the immediate post-operative CT imaging.