Facet joint injections Facet joint injections For patients with facet joint arthropathy , x-ray-guided local anaesthetic and steroid injections may be both diagnostic and therapeutic for 4–6 weeks. Longer term relief may be obtained by facet joint rhizolysis. This percutaneous procedure dener vates the facet joint. Facet joint injections For patients with facet joint arthropathy , x-ray-guided local anaesthetic and steroid injections may be both diagnostic and therapeutic for 4–6 weeks. Longer term relief may be obtained by facet joint rhizolysis. This percutaneous procedure dener vates the facet joint. Facet joint injections For patients with facet joint arthropathy , x-ray-guided local anaesthetic and steroid injections may be both diagnostic and therapeutic for 4–6 weeks. Longer term relief may be obtained by facet joint rhizolysis. This percutaneous procedure dener vates the facet joint.