Dr. Mark Dahl is an Assistant Professor in the Department of Orthopaedic Surgery at the University of Minnesota. He received his medical degree from Mayo Medical School in 1980. His clinical interests are Limb Lengthening; Deformity Correction; Knee Arthritis and Cartilage Preservation; Ankle Arthritis and Cartilage Preservation; Lower Extremity Osteotomy; Repair of Nonunions.