Zirconia Performance
By virtue of advanced production technology and strict quality control, we are able to provide premium zirconia with the following excellent properties.
1. Superior mechanical properties: high strength and optimum fracture toughness
2. Precise and stable sintering shrinkage ratio
3. Excellent resistance to aging
4. Excellent edge stability
5. Uniform, flawless microstructure
Due to the above outstanding properties, our zirconia has passed the most authoritative international certification.
1. Physical Properties of Zirconia Block
The zirconia is sintered at a high temperature of 1480℃ or 1530℃ and the obtained product features high density, high strength, high transparency, and more. The specific physical parameters are as follows.
| High Translucent Material | Super Translucent Material | Super Translucent Pre-shaded material | |
| Sintering temperature | 1480 | 1480 | 1530 |
| Coefficient of thermal Expansion (25-500℃ ) | 10.5 × 10 -6 | 10.5 × 10 -6 | 10.5 × 10 -6 |
| Density after sintering (g/cm 3) | 6.07 | 6.08 | 6.09 |
| Strength (MPa) | 1200 | 1200 | 1200 |
| Average grain size (μm) | 0.4 | 0.4 | 0.4 |
| Surface monoclinic phase content after accelerated aging (%) | <10 | <10 | <10 |
| Average transmittance (1mm) | 37% | 44% | 35% |
| Radioactivity (Bq/g) | <0.1 | <0.1 | <0.1 |
2. Biological Properties
After tested by biological experiments, our zirconia block has no toxicity or allergenicity. It has good biocompatibility and is not stimulating to oral mucosa.
| Cytotoxicity Test | No.4.4.1 item | 0 grade Cytotoxicity | 0 grade cytotoxicity and no cell toxicity | Up to standard |
| Short-term systemic toxicity test (absorb through mouth) | No.4.4.2 item | No systemic toxicity | During experimental observation, each index of the test groups shows no significant difference with that of the control group, indicating that the test sample has no systemic toxicity | Up to standard |
| Anaphylaxis test (delayed-type hypersensitivity Test) | No.4.4.3 item | No allergic reaction | The skin reaction level of 10 tested animals is 0, less than1, showing that the tested sample has no allergic reaction | Up to standard |
| Hemolysis test | No.4.4.4 item | Hemolysis ratio < 5% | The hemolysis rate of the test samples is 0.96%, demonstrating no hemolytic effect | Up to standard |
| Ames test | No.4.4.5 item | Induced into negative Symptoms | The number of the revertant colonies of the test sample is not 2 times higher than that of the negative control sample, no dose-effect relationship, negative salmonella typhimurium mutagenicity | Up to standard |
| Oral mucosa stimulation test | No.4.4.6 item | No oral mucous irritation | Stimulus index: 0, indicating that the tested sample is not stimulating to oral mucous | Up to standard |
3. SEM Image of Zirconia
Our zirconia has dense microstructure, ensuring stable performance.
4. Zirconia Transmittance
The zirconia produced by our company is tested to show good transmittance.
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