Ion Release from Metal-on-metal Hip Resurfacing Implants Does Not Differ from Standard Metal-on-metal Total Hip Replacement

STANDARD METAL-ON-METAL TOTAL HIP REPLACEMENT *Moroni A, **Savarino L, *Cadossi M, **Greco M, **Baldini N, *Giannini S * Rizzoli Orthopaedic Institute, Bologna, Italy **Laboratory for Pathophysiology of Orthopaedic Implants, Rizzoli Orthopaedic Institute, Bologna, Italy [email protected] INTRODUCTION Modern metal-on-metal (MOM) hip resurfacing has been introduced as a less invasive method of joint reconstruction for young-active patients (1). Hip resurfacing advantages include: bone stock preservation, wider range of motion, better functional outcomes and lower rate of dislocation. However, considering the large diameter of the coupling components, there are concerns regarding the quantity of metal ion release. The aim of this study was firstly to quantify the production of metal ion release in patients with a MOM hip resurfacing prosthesis and to compare this result with a control group. Secondly, we wanted to compare metal ion release after hip resurfacing with metal ion release after MOM total hip replacement as investigated in a previous study (2).