抄録
As for the teeth that periodontal tissue was lost extensively by periodontal disease, alveolar ridge produces remarkable absorption by tooth extraction, and there is much that it becomes disadvantagenus habitat when treats afterward. So, in this study, the bone defect model which had buccal dehiscence pattern bone defect found with was made, and we referred about depression effect of alveolar ridge absorption at having applied atelo-collagen sponge in tooth extraction socket.
Fourteen mongrel adult dogs were used. Went to root apex from top of buccal bone, and made buccal dehiscence pattern bone defect of 5 mm deep artificially after raised full thickness flap buccal gingiva in the first molar of lower jaw both sides, and extracted a tooth. Atelo-collagen sponge was implanted in tooth extraction socket in experimental group, and the control group wasn't implanted. And single suture was performed sewed 2 places at interdental papilla after having done reposition of gingival flap. The after an operation did ablution sterilization of wound by chlorhexidine. Impression of alveolar ridge was performed after operation for 24 weeks for 12 weeks, and sacrified it.
Evaluation method analyzed model for measurement provided with impression making, in addition, the examination was observed histopathologically. Model assay did variate of alveolar ridge, width of profile from buccal to the lingua side and each of area on the basis of constant basis and measured it and examined each. As for experimental group and control group, process of good healing was observed. At compared experimental group with control group after operation in 24 weeks, the variate of alveolar ridge showed small value in significance. And both showed big value in significance with experimental group as a result of having measured width and an area of alveolar ridge. In observation of histology, as for control group, collapse of alveolar ridge was found conspicuously, and, as for experimental group, corticalization of bone was good, and the collapse of wound was restrained for it.
From these results, it was suggested that atelo-collagen sponge was effective.
