Metal on metal hip arthroplasty surveillance at a tertiary centre: design, patients' adherence, and cost analysis.

Purpose: Metal-on-metal (MOM) bearings may carry higher than expected revision rates and serious complications: an appropriate surveillance may be advocated. Aims of this paper were to (1) present the biennial experience of MOM surveillance in a tertiary centre, (2) describe the patients' adherence to monitoring, and (3) analyze the costs of the surveillance METHODS: The design of MOM surveillance was developed according to the guidelines of the Italian Society of Orthopaedics and Traumatology. The adherence to every follow-up was expressed as raw numbers and percentages.