Histological evaluation for removed ha-coated implants

摘要

In 1988, Titanium sticks (Ti-6Al-4V) coated with hydroxyapatite (HA) using a high-velocity flame-spraying technique (HVFST) were developed for endodontic implants. Sixty-three patients involving 87 anchored teeth were treated between April 1989 and April 1999. The subjects of this study were 2 patients with 2 implants that had been placed for 6 years each. Regarding the removal, we were not able to extirpate only the implants due to adhesion to the bone. Therefore, we removed a mass of both the surrounding bone and implants. Histologically, in the first case, coated-HA were resisted, contacted directly with the bone. In the second case, coated-HA were completely resorbed, titanium and bone were binded. we have concluded that the difference of these findings were caused by the methods of HA coating process itself.