Elbow Replacement Patient Testimonial: J. Clinton Walker, M.D. Jun 30 · 2 years ago by Signature Medical Group · Bookmark >1 min read Ann Tortorici couldn’t fully move her arm for 11 years. She needed an elbow replacement. The procedure was performed by Clinton Walker, M.D., a hand and upper extremity surgeon with Kansas City Bone & Joint Clinic. Now Ann has full movement again.