YUCERA Good Quality Preshaded ST Color Zirconia Blocks Dental Materials And Laboratory Materials
Sintering
Every batch of zirconia block has gone though a completely sintering test. The sintering methods have a great impact on blocks’ properties, such as translucency, dyeing results, strength, hardness and ageing resistance, which will affect the blocks’ final stability. Therefore, please follow the sintering curve of it.
The translucency of restorations is closely related to sintering temperature and regular maintenance of sintering furnace. Please follow the below temperature chart.
HT/ST Sintering Curve (1-5)
| HT/ST Sintering Curve (1-5) |
| Sintering step | Start Temperature(℃) | End Temperature(℃) | Time(Min) | Rate(℃/Min) |
| Step 1 | 20 | 300 | 30 | 9.3 |
| Step 2 | 300 | 1200 | 150 | 6 |
| Step 3 | 1200 | 1530 | 110 | 3 |
| Step 4 | 1530 | 1530 | 120 | 0 |
| Step 5 | 1530 | 800 | 100 | -7.3 |
| Step 6 | 800 | natural cooling 20 | 120 | -6.5 |
HT/ST Sintering Curve (10 units)
| HT/ST Sintering Curve (10 units) |
| Sintering step | Start Temperature(℃) | End Temperature(℃) | Time(Min) | Rate(℃/Min) |
| Step 1 | 20 | 300 | 30 | 9.3 |
| Step 2 | 300 | 1200 | 190 | 4.7 |
| Step 3 | 1200 | 1530 | 150 | 2.2 |
| Step 4 | 1530 | 1530 | 120 | 0 |
| Step 5 | 1530 | 800 | 120 | -6 |
| Step 6 | 800 | natural cooling 20 | 120 | -6.5 |
ST Pre Shaded Zirconia Blocks
-- First grade Zirconia powder
-- Made under COLD ISOSTATIC UNAXIAL PRESSING AND MACHINING which gives a more uniform fit.
-- High mechanical strength reaches as high as 600 Mpa called non-fracture zirconia
-- Excellent translucent with light transmittance higher than 30%
-- Shrinkage adjusted for 20%
ST Pre Shaded Zirconia Blocks
*Pre-shaded technics
*Uniform color
*Without post dyeing posses
*Suitable for full contour crown, bridge and anterior
Indications
Crown, Inlay, Onlay, 2-5 unit Bridges, Anterior
Pre Shaded Zirconia Blocks Physical Characteristics
| Physical Characteristics |
| Sintered density 6.07±0.01g/cm³ |
| Bending Strength 1100 MPa |
| Transmittance 45% |
| Hardness 1200HV |
| Sintering temperature 1480~1550℃/recommend 1530℃ |
