title: Differences between the bony interfaces of titanium and hydroxyapatite-alumina plasma-sprayed titanium blade implants.
abstract: 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.
authors.forename: K
authors.initials: K
authors.lastname: Morimoto
authors.forename: A
authors.initials: A
authors.lastname: Kihara
authors.forename: F
authors.initials: F
authors.lastname: Takeshita
authors.forename: H
authors.initials: H
authors.lastname: Akedo
authors.forename: T
authors.initials: T
authors.lastname: Suetsugu
mesh_terms: 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
chemical_list: D015921:Dental Implants; D006882:Hydroxyapatites; D017886:Durapatite; D014025:Titanium; D000537:Aluminum Oxide