Abstract
An experimental study using dog mandible was performed in order to reveal the histopathology of the exfoliation of HA-Al coating on a Sumicikon implant.
At the time of implantation, implant channel was prepared more tightly than usual, and then the implant was purposely strongly tapped with a mallet.The dog was sacrificed 28 days postoperatively.After that, semi-serial undecalcified histologic sections were made for light microscopic observations.
The results obtained were as follows:The implant was attached to the epithelium and fibrous tissue in the gingiva, and surrounded with regenerative bone and fibrous tissue at a rate of 50%, respectively, in the bone. The coated layer of the implant was partly exfoliated only at the apical region.
The exfoliated ceramic masses were also in contact with both regenerative bone and fibrous tissue.
A few foreign-body giant cells were observed around the small exfoliated mass, but inflammatory reaction was hardly seen in the sections.
From the results, the partial exfoliation of HA-Al coating on the Sumicikon implant seemed not to influence the stability and success of the implant.
