Differences between the bony interfaces of titanium and hydroxyapatite-alumina plasma-sprayed titanium blade implants.
Histopathologic study was done to reveal the difference of bony interface in the mandibular bone between titanium blade implants and titanium implants coated with the mixture of hydroxyapatite-alumina by the plasma-spray technique, using the improved undecalcified histologic technique and the image analyzing system. In 4 adult shepherd dogs, the implantation was performed in the molar region of the mandible 2 months after tooth extraction. The coated implants and the non-coated ones were inserted respectively in the mandibles. They were sacrificed on the 5th, 7th, 14th and 28th day postoperatively. In 5-day implant after insertion, granulation tissues or fibrous connective tissues were observed around both implants in bone tissues. In 7-day implant, osteoid tissues regenerated around the apex of both implants, but attached a little to them. In 14-day implant, osteoid tissues or woven bone regenerated around both implants and attached more to the coated implant (approximately 13.7%) than the non-coated one (approximately 6.0%). In 28-day implant, regenerative woven or lamellar bone attached much more to the coated implant (approximately 63.4%) than the non-coated one (approximately 8.8%). Bony interface increased remarkably in the coated implants, chronologically. The results showed that the plasma-sprayed hydroxyapatite-alumina coating was effective for the initial fixation of endosseous dental implants.
Morimoto
K
K
Kihara
A
A
Takeshita
F
F
Akedo
H
H
Suetsugu
T
T
D000537:Aluminum Oxide; D000818:Animals; D001751:Blade Implantation / Q000295:instrumentation*; D001861:Bone Regeneration; D001842:Bone and Bones / Q000502:physiology*; D003758:Dental Implantation, Endosseous / Q000295:instrumentation*; D015921:Dental Implants; D004285:Dogs; D017886:Durapatite; D006882:Hydroxyapatites; D014025:Titanium
D015921:Dental Implants; D006882:Hydroxyapatites; D017886:Durapatite; D014025:Titanium; D000537:Aluminum Oxide