Saber-Samandari and Gross (2009) and Viswanath et al. (2007) found a small anisotropy by nanoindentation on hydroxyapatite single crystals and hardness values comparable to our results
Saber-Samandari and Gross (2009) andViswanath et al. (2007) found a small anisotropy by nanoindentationon hydroxyapatite single crystals and hardness values comparableto our results