Hydroxyapatite is applied as a coating on orthopedic and dental implants. It directly bonds with bone tissue, improving the implant integration. In vivo biological studies have shown that charged hydroxyapatite may take half the time to bond with bone tissue, compared to non-charged hydroxyapatite. However, there is a challenge: how to charge the coatings? Conventional thermoelectrical poling is not applicable. In this work, a solution is proposed: the corona triode charging. It is demonstrated the possibility of achieving a large and stable negative charge density on hydroxyapatite pellets. The corona discharge has a promising potential in orthopedics and oral implantology.