09 April 2019
The AO community is saddened to learn of the passing of Jeffrey Welling Mast, MD. For many in the AO, Jeffrey Welling Mast, MD, was an outstanding mentor. Able to criticize while also encouraging, to inspire and motivate, Jeff was always ready to offer friendly advice and support.
Born on September 7, 1940, in Easton, New York, into an artistic family, this creative environment found expression in his legendary pre-operative planning and operative skills.
As director of healthcare efforts in Tibet, Jeff was asked to accompany the wife of a local hotel owner on an medevac mission to seek specialized care in Bern, Switzerland. There he met Maurice E Müller. His interest in Müller's surgical skills grew quickly, ultimately leading him to focus on orthopedic surgery and specialize in fracture fixation, nonunion, bio-regenerative hip salvage, and osteotomy of the hip and knee deformities.
After completing orthopedic training at the University of Southern California Los Angeles County Hospital, he worked and trained in a number of places, eventually spending two years in Bern, where his partnership with Reinhold Ganz blossomed. Together, they developed a safe method of performing periacetabular osteotomy and bioregenerative surgical treatment of hip disease, which created tremendous opportunities to improve patients with congenital hip dysplasia and Perthes disease. Due to these achievements, the two men were recognized as the top two contemporary hip preservation and reconstructive surgeons in the world.