The ROSY robot system has been developed to simulate movements of the jaw under stepper motor control. The areas of indication comprise functional diagnostics and production of designed occlusal splints. Moreover, this device can also be extended for use in other areas. The computer-assisted design of OR templates has become possible. The simulator also permits the production of implant-borne restorations with optimum implant loading. Keywords: dental medicine, function, simulator, robot, computer, mandibular movement