Minimally invasive lumbar facet arthrodesis with the FFX® device: surgical anatomy, patient selection, and technique.

Abstract

Facet syndrome, a common but often under-recognised condition, is frequently overlooked in clinical assessment. When conservative treatment fails, minimally invasive lumbar facet arthrodesis using an interarticular device (FFX®) offers joint-specific fusion while preserving segmental mobility. This article details the relevant anatomy, patient selection algorithm, and step-by-step surgical technique. We also provide preliminary clinical outcomes from the first 100 consecutive cases, demonstrating a 91% fusion rate, significant pain reduction (mean VAS 7.2 → 2.1), and functional improvement (ODI 46 → 18) at 12 months, with low complication rates.