Karin Büttner-Janz is a German medical doctor and former gymnast who won World and Olympic gold medals in artistic gymnastics for East Germany. She is co-inventor of the first artificial intervertebra
Büttner-Janz in 1972
Karin Büttner-Janz (left) and Kurt Schellnack (center) developed the artificial spine disk Charité Disc in the 1980s