According to the invention, the components of the system have been
optimised such that they interact and complement each other and such that
one cannot operate without the other in the formation of refractory
moulds for multiple metal castings in the production of fixed dental
prostheses. The invention also relates to a mechanical metal device for
positioning increased length refractory cylinders in standard horizontal
centrifuges, thereby increasing the number of fixed dental prostheses
that can be cast at one time.