Table 2 |
|
| FDA requirements for HA coatings (Callahan et al. 1994) | |
| Properties | Specification |
| Thickness | Not specific |
| Crystallinity | 62% minimum |
| Phase purity | 95% minimum |
| Ca/P atomic ratio | 1.67 to 1.76 |
| Density | 2.98 g/cm3 |
| Heavy metals | < 50 ppm |
| Tensile strength | > 50.8 MPa |
| Shear strength | > 22 MPa |
| Abrasion | Not specific |
Dorozhkin Progress in Biomaterials 2012 1:1 doi:10.1186/2194-0517-1-1
