Attempts to avoid fusion surgery, the intentional stiffening of formerly mobile lumbar motion segments, are under way as developments in less invasive procedures emerge. Dr. John Devine, Lt. Col. and associate professor of surgery of the Armed Health Services, discusses the latest research in replacing diseased facet joints. Also, Dr. Jens Chapman, professor of orthopaedic and neurological surgery at the University of Washington, reviews interspinous spacers aimed at reducing symptoms of spinal stenosis. From the Series:Sixth Annual Harborview Spine Symposium: Arthritic Disorders of the Spine