Pre-sintered ZYTTRIA Z401 WHITE TRASLUCENT, ZYTTRIA Z402 EXTRA-TRASLUCENT, ZYTTRIA Z402 EXTRA-TRASLUCENT PLUS and ZYTTRIA Z COLOR components are processed using the following procedure: Insert the component on the milling machine support Program milling considering the final dimensions of the structure Process the component with a tungsten carbide or diamond-point milling machine according to…
Pre-sintered ZYTTRIA® may be milled using the most common Cad/Cam systems or with manual pantographs. In order to avoid possible breakages and/or any stress on the product being processed, consult the machine manual to select the most appropriate milling and revolution speed. Program the milling machine considering the final dimensions of the…
The measurements of the final dental prosthesis must be known before milling the pre-sintered components. Some machines use the multiplication (enlargement) coefficient, while others use shrinkage. If the MULTIPLICATION COEFFICIENT method (enlargement coefficient) is used, each final measurement must be multiplied by this coefficient, specified for each lot. If PERCENTAGE…
Pre-sintered Zirconia is porous (48%) and absorbs processing water or dyeing liquids on the basis of the milling and immersion time. Warning! Zirconia products must be properly dried before being placed in the sintering kiln. The product may be dried after wet processing or dyeing with a fan heater at a…
Warning! Exceeding the recommended sintering temperature could lead to deterioration of the product chemical and mechanical characteristics. If a ceramic material is “over-fired”, e.g. 70/80°C higher than the recommended temperature, there would be growth in the crystals, with possible deterioration of the typical characteristics of the Zirconia. _____________________________________________________ Another important…
The sintered product may be finished using diamond wheels. Warning! This processing may alter the biological, chemical, physical and mechanical properties of the Zirconia products. A possible overheating of the surface of the prosthetic structure may lead to a transformation of the structure from tetragonal (high resistance) to monoclinic (low…
Traditional and adhesive cementation A rough surface gives greater adhesion both with traditional and adhesive cementation. It is useful to sand the surfaces with aluminium oxide, 110nm, 3-4 bar. Traditional cementation No particular conditioning is necessary. Use Zinc-phosphate cement Glass-ionomer cement e.g. Dyract cem plus, Dentsply, Costanza, Vivaglass Cem Adhesive…
Ceramic coating of bridges or crowns manufactured with ZYTTRIA® may be performed using standard ceramic available on the market for frameworks made of Zirconium Oxide with a thermal expansion coefficient (CET) of about 8.8 / 9.5. The ceramic adheres on Zirconia not only for mechanical contraction , but also for chemical bond as for metal,…
Processing in compliance with best practice Sequence of procedure to make a flawless prosthetic structure More Info Milling Preparation of prosthetic elements. Enlargement coefficient/shrinkage More Info Colouring Colour framework with AQUA colour liquid, by dipping or brushing technique More Info Drying Dry Zirconia in a proper way More Info Sintering…