The aim of this experiment is to compare the healing process of extraction sockets after immediate implant placement with those using autogenous bone grafts and guided tissue regeneration with Gore-Tex.
The first lower premolars and the second premolars of six experimental dogs were extracted and Stryker fin type implants were placed into the extraction sockets immediately after extraction. In the control group, any graft materials were'not used
and
the dead space around implants was left in itself and covered with only periosteum. In the experimental group A, implants were covered with Gore tex without any bone grafts, and in the experimental group B, the dead space around implants was
filled
with
the bone chips gained from drilling procedure.
Each experimental dogs were sacrificed at the 1st, 2nd, 3rd, 6th, and 8th week and the specimens were observed by gross examination, radiological examination, and light microscopic examination.
@ES The folowing results were obtained.
@EN 1. Well healed soft tissue and no mobility of the implants were observed in control and two experimental groups.
2. In the radiogical examination, radiopacity around implants had been increased gradually.
3. In the microscopic examination, there were good healing process and active new bone formation in both of control and experimental groups. Especially the more anount of new bone formation occurred in the experimental group B using bone chips.
4. Bone chip grafts and guided tissue regeneration(GTR) using Gore-Tex may be one of the successful methods in the immediate implantation.
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