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[Experimental study on immediate endosseous implantation].

Screw type implants (ITI series) were implanted into the socket of extracted teeth of adult dogs to investigate the histologic recovery process of implantation. Two groups of immediate implantation. (with or without filling of cancellous bone chips) were performed, with a follow-up period of one month and three months. Results showed that marked immature new bone formation was found one month later after implantation. The amount of new bone in the group with cancellous bone implantation was much more than that in the group without bone chips. Mature new bone was observed three month later after operation, no marked difference was found in the amount of new bone between the two groups.