Abstract
HA-coated Dental Implant (Kyoceya, Japan) were extracted from mandibular bone for fracture of the upper structure after 44 months, including a loading period of 40 months. And it was prepared using a cutting-grinding system and studied with transmission electron microscopy. The HA-coated Dental Implant showed an intimate bone contact at the ceramic surface under a loaded condition in human that appeared to achieve biointegration at the ultrastructural level. However, detachment of HA crystals from the coated surface is evident. Crystals are situated inside the newly formed bone surrounding the implant and the cytoplasm of phagocytic cells.
