White ultra-fine powder (3-5 microns), stable performance, white and delicate paste
It is highly similar to the hard tissue composition of the tooth body and has good affinity compatibility with tooth enamel
Zinc hydroxyapatite has good antibacterial properties and can inhibit plaque formation
It has good performance in promoting tooth remineralization and promoting the remineralization of small damaged areas of tooth enamel
Ultra-fine particle size can seal dentin tubules and relieve sensitive symptoms
Addition Amount: 5%-10%
| Technical indicators | Unit | Hydroxyapatite (HAP) | Zinc Hydroxyapatite (Zn-HAP) | Test methodology |
| Appearance | White powder, free of particles and impurities | White powder, free of particles and impurities | QB/T 5637-2021 | |
| Calcium/phosphorus atomic ratio | 1.67±0.02 | / | QB/T 5637-2021 | |
| (calcium + zinc) / phosphorus atomic ratio | / | 1.67±0.02 | QB/T 5637-2021 | |
| Zinc content | % | / | 2.0～4.0 | QB/T 5637-2021 |
| 105°C volatile content | % | ≤3.0 | ≤3.0 | QB/T 5637-2021 |
| Burn and lose weight | % | ≤4.5 | ≤4.5 | QB/T 5637-2021 |
| Whiteness (Wg) | % | ≥91 | ≥91 | QB/T 5637-2021 |
| pH（5%） | % | 6.5-7.5 | 6.5-8.5 | QB/T 5637-2021 |
| Fineness (325 mesh) | % | ≥99.5 | ≥99.5 | QB/T 5637-2021 |
| Particle size (D50) | μm | 3～5 | 3～5 | QB/T 5637-2021 |
| Heavy metals (in lead) | mg/kg | ＜10.0 | ＜10.0 | QB/T 5637-2021 |
| Arsenic content | mg/kg | ＜2.0 | ＜2.0 | QB/T 5637-2021 |
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