잡종견 치조제 증대를 위한 분쇄형 동종치아골이식재의 평가

Abstract

The alveolar ridge undergoes both quantitative and qualitative changes following tooth extraction,. The aim of this study was to evaluate the effect of particulated dog-tooth-driven grafts on healing of buccal dehiscence defects in mongrel dogs. The maxillary lateral incisors of 12 dogs were extracted. After extraction, two thirds of the buccal wall were removed to make a dehiscence type defect. And the extraction sockets with dehiscence defects were grafted with particulated tooth-driven allografts without barrier membrane covering. Histologic and histomorphometric analysis of ridge augmentation and dehiscent defect healing was performed at 4- and 8-week after treatment according to routine methods. Statistical analysis was done using Mann-Whitney test and Wilcoxon ranked test. Some of the grafted tooth-driven particualted allogrfts were surrounded by newly formed bone matrix but large number of them were placed within fiborus components without associated new bone formation. They caused no remarkable foreign reaction even focal mild chronic inflammatory infiltration was noted. The extracted tooth socked were fairly repaired by grafted tooth driven allografts and newly formed bone with some ridge augmentation but cortical bone plate was note completely formed.

These findings suggest that the particulated tooth driven allografts might be applicable for dehiscence type of extraction socket due to favorable biocompatibility and bone repair supporting capacity.

Key words : tooth bone grafting, extraction socket, dehiscence defect