骨内インプラント体界面における骨形成と微細血管構築の変化 : 生体活性材料と生体不活性材料の比較

概要

論文の詳細を見る
Bone formation and microvascular changes after implantation of bio-active (glass-ceramic) and bio-inert (alumina-ceramic) materials were studied chronologically by LM, TEM and SEM of corrosion casts. The results were summarized as follows : 1. In the early stage, bone formation was observed directly on the glass-ceramic and dense vascular network was found on the interface of the implant. In case of the alumina-ceramic, however, coarse vascular network was found among the newly-formed bone trabeculae. 2. At 4 weeks, the bone on the glass-ceramic became to connect with the surrounding bone. In case of the alumina-ceramic, two types of areas were observed ; one was active bone formation area and the other was active bone resorption area. Therefore, after 4 weeks was thought to be an important stage which would influence the condition of the surface of the implant. 3. At 8 weeks, bone was formed on most part of the glass-ceramic. Multinucleated giant cells (MNGCs) having ruffled border were recognized in the area where bone was not formed. These MNGCs were thought to relate the bone remodelling on the surface of the implants. On the other hand, alumina-ceramic was covered with bone or fibrouas tissue, and no active bone remodelling was observed.
日本補綴歯科学会の論文
1991-04-01