Pre-heating oven for skeletal prostheses with an electronic card for storing 10 cycles, each of them includes 4 stages with temperatures, rising speed and standby times that may be preset by the operator according to his needs. Possibility to preset a 8 stage cycle and a cooling phase. Timer for deferred weekly ignition. Final temperature which may be preset up to 1100 °C. Heating system by muffle with resistances on two sides and ceiling. Set for the connection to an extractor equipped with intake fan, controlled by card with two options: automatic ignition of the fan when the heating system starts with temperature programming for stopping the fan or manually fan drive with timer programming for the duration of the intake time. Visualization of the cycle time period. Safety microswitch that cuts off the power to the resistance in any phase of the heating cycle when the door opens. Input voltage 230 V ac 50/60 hz. Overall dimensions 53W x 70D x 70H cm. Inner chamber dimensions 24W x 32D x 18H cm. Capacity 12 9x. Power 4000 W. Weight 90 kg.