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KMID : 0376319940060010387
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Dental Journal of CNU
1994 Volume.6 No. 1 p.387 ~ p.406
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Effects of Demineralized Freeze-dried Bone and Resorbable Hydroxyapatite on New Bone Formation of the Extraction Socket in dogs
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Abstract
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The present study was aimed to evaluate the effect of demineralized freeze-dried bone (DFDB) and resorbable hydroxyapatite (RHA) on bone formation in the extracted socket.
The lower left and right 2nd and 3rd premolar were extracted in adult dogs. The one group was grafted with DFDB into the extracted socket, and the other group grafted with RHA. The extracted socket was sutured without any graft materials as
control.
The animals were killed on the 1st, 2nd, 4th, and 8th weeks after the graft for macroscopic and microscopic examination.
@ES Results obtained were as follows:
@EN 1. Macroscopically, norm infection of the graft site and dislodgement of the grafted material were noted in any animals used.
2. Young trabeculae of osteoid were formed in the socket wall in control group at 2 weeks after the graft. Osteoid tissue was formed in DFDB group at 1 week after graft, and a fine osteoid tissue was grown through the RHA particles in RHA group
at 2
weeks after graft.
3. The grafted group showed more rapid formation than RHA group, DFDN group showed osteoinductive bone formation and RHA group showed osteoconductive bone formation.
These results suggest that DFDB and RHA are useful to preserve the alveolar bone and to improve now bone formation by immediate grafting into the extraction sokets.
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KEYWORD
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