MATERIAL

• Zirconium dioxide Type II, Class 4 (DIN EN ISO 6872)
• Flexural strength > 650 MPa
• High translucence of 49%
• Brilliant aesthetics
• CTE (10,5 ± 0,5) ·10^-6·K^-1
• Thin wall thicknesses of 0.4 mm for single crowns in the anterior tooth area and 0.6 mm in the posterior tooth area
• Precise edges and margins due to highly compacted material
• Veneering possible with any ceramic mapped to the CTE of ZrO₂
• Cross-batch color fidelity
• Homogeneous block shading
• Color can be reproduced at any time
• Biocompatible

CHEMICAL COMPOSITION

Zirconium dioxide (ZrO₂/HfO₂): 89.89 - 90.7 %
Yttrium oxide (Y₂O₃): 8.55 - 10.11 %
Aluminum oxide (Al₂O₃): < 0.2 %
Other oxides: < 0.7 %

CONSTRUCTION

SINTERING

Recommendation for standard sintering:
Heating and cooling rate 10°C/min
Hold time 120 minutes at 1,450°C
Total sintering time approx. 7 hours

Recommendation on rapid sintering: (for bridges with up to 3 pontics)
Heating rate 10°C/min
Hold time 30 minutes at 1,500°C
Cooling rate 40°C/min
Total sintering time approx. 4 hours

Sintering together with other materials could cause unwanted changes in color and translucence. This applies particularly to materials processed using dye liquids. Sintering beads must also be replaced to avoid dye liquid residues.

It is particularly important to clean sintering furnaces that are contaminated by dye liquids before sintering a pre-shaded material for the first time. This prevents unpleasant surprises and allows optimum photo-optical results for the zirconium dioxide.

VENEERING

Any ceramic veneers recommended for zirconium dioxide ceramics may be used.

MILLING

Reduce feed rates during rough machining: The quality of milling depends on several factors including the machine, machining strategy, zirconium dioxide, etc. To ensure that you can achieve optimum milling results from the start with high translucence blanks, we recommend using a lower speed than with opaque materials during rough machining.

ADJUSTMENTS

Any adjustments required to the sintered restorations once compacted must only be carried out using diamond-coated tools to prevent damage to the material caused by local overheating or exposure of the surface of the restoration to excessive force.

FIXING

Restorations can be cemented conventionally with a zinc phosphate or glass ionomer cement or with self-adhesive and fully-adhesive fixing material.