Hydroxyapatite (HA) is a calcium phosphate mineral (Ca10(PO4)6(OH)2) which is the main constituent in bone and teeth. HA is known for its special proper-ties, especially when in contact with living tissue. HA's bioactivity is ad-vantageous in a range of applica-tions, such as bone implants and stents. Due to HA’s unique similar-ity to the hard tissues found in bio-logical systems, it is widely used as reference material whenever inter-actions between hard tissues and biological species are of interest. Q-Sense collaborates with the company Promimic that has devel-oped a proprietary method to coat materials with nanocrystalline Hy-droxyapatite having high stability and smoothness, called Promimic HANANO.