Intelligent electronics controlled by Software control the press valves to maintain the correct pressing power dynamically during the pressing process. For the user, this provides two major advantages over previous technologies:

1. The furnace can now react to pressure fluctuations from air hoses and other equipment on the airline.  This issue particularly affect weaker systems and has created mis-presses in other ovens.

2. The system adjusts the pressure depending on the flow rate of the ceramic. This function significantly reduces load on the investment ring structure.  Since dental restorations never have uniform layer thickness (due to their anatomy),  the flow velocity changes during the pressing process. A conventional furnace that applies a constant single speed and pressure may crack investment ring structures, or cause mis-presses if settings are incorrect, or line pressure is inconsistent.

The furnace design aligns with modern dental technology requirements, offering intuitive program creation for firing or pressing. Programs are organized in computer-like folders for easy access. The high-quality safety glass display, measuring 12 inches with LED backlighting, provides real-time parameters during a program. Conveniently viewable from a distance or unfavorable angle, the touch display allows direct parameter adjustments if needed. Temporary changes reset to original values at the program’s end. These features, among others, enhance comfort and efficiency for dental technicians using the VARIO PRESS 330 pressing and firing furnace in modern dental laboratories.

The firing of dental ceramics on zirconia sub-structures carries a high risk of crack formation while cooling. With the VARIO PRESS 330.e ZR, the new TTC technology is available to you.
In this process, a linear, controlled cooling is possible by specifying a temperature gradient between 5°C/min and 45°C/min within a firing program. Thanks to the innovative design of the outer firing chamber and an intelligent software, an actively controlled return of the ceramic to the temperature range below the glass point is guaranteed. This reduces the risk of cracks and the dreaded „chipping“ of the dental ceramics used is reduced to a minimum.

Graph 1 shows the temperature difference of approximately 40°C between the set temperature in the pressing furnace and the inside temperature of the ring during standard pressing. The high temperature difference between the ideal press temperature for lithium disilicate in the ring core and the high temperature in the outside area of the ring, where the pressed objects are usually located, leads to a strongly pronounced reaction layer. This effect is reinforced by the long holding and pressing time. The result is a rough surface (orange peel) and time-consuming, laborious finishing.
Graph 2 shows the homogeneous temperature distribution from the thermal sensor of the pressing furnace to the inside of the ring. There is a maximum temperature difference of 4°C. This ensures that all objects, regardless of their position in the ring, are pressed in the ideal pressing temperature range for lithium disilicate. The formation of a reaction layer is reduced to a minimum, and the extremely short pressing time further supports this. Smooth, homogeneous surfaces as well as enormous time saving in finishing and finalizing the restoration are the result of ADVANCED PRESS™.