PHOENIX & EDEN PRAIRIE, Minn.--(BUSINESS WIRE)--Bringing advanced spinal treatment technology to the greater Phoenix area, Surgical Specialty Hospital of Arizona has treated the first U.S. patient with the DASCOR Disc Arthroplasty System. DASCOR is a catheter-based, minimally invasive nucleus replacement technology from Minnesota-based Disc Dynamics, Inc. The DASCOR device is designed to treat lower back pain associated with degenerative disc disease.