<正>In order that the involved teeth might survive TA2&TC4 endodontic-endosseousimplanation was performed in 27 teeth（18 with periodonto-endodontic combined lesion andwith periodontitis）.Ajter 1-34 months’obseroation

6 teeth were prominently improoed

15improoed and 6 had no change.For the purpose of observing the ccnditon of implants inbones

endodontic-endosseous implantation was performed in ■ of a dog

with the implantsbeing TA2 for ■ and TC4 for■.Seventeen months later

the animal was killed.Analysisof SEM and electron microprobe findings showed that Ca was attached to both TA2 and TC4imlants.Histological sections showed connective tissue capsule formation with osteoid tissueat the bottom and lateral wall.