抜歯窩挿入型ハイドロキシアパタイト・セラミックス・インプラントによる顎堤の保全効果 : インプラント体の形状の影響

概要

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There are two types of cone and particle in hydroxyapatite ceramics implant (HAP) applied to the fresh extraction socket. In this study it was investigated macroscopically, microscopically, radiologically and morphologically, which form of cone or particle is more effective to prevent the alveolar ridge from bone resorption. In the left and right premolar region of mandibular ridge in the same dogs, the ridges submerged cone type NAP (C-HAP) and particle type HAP (P-HAP) respectively were compared with the ridge which only tooth extraction (Ext) was done, and furthermore the ridges submerged C-HAP and P-HAP was compared each other. The following results were obtained. 1) This HAP have biocompatibility with the bone. 2) The C-HAP was more effective to preserve the contour of the alveolar ridges than the P-HAP. 3) There were free particles from thebone near the alveolar crest in the ridges of the P-HAP, and the bone fracture at the alveolar crest brought about more frequently in ridges with the P-HAP than the ridges with C-HAP and Ext. 4) The bone fracture and the presence of the free particles of alveolar crest result in continuous bone resorption auad more change in tlae contour of the ridge with P-HAP than with C-HAP.
社団法人日本補綴歯科学会の論文
1988-08-01