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Effect of Hydroxyapatite and Zinc-Containing Hydroxyapatite on Osseous Repair of Critical Size Defect in the Rat Calvaria

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Abstract:

Hydroxyapatite (HA), widely used as bone graft, can be modified by the incorporation of bivalent cations (Mg2+ and Zn2+) and its gradual release could favor the bone repair. The purpose of this research was to evaluate the effect of the HA and zinc-containing hydroxyapatite (Zn-HA) in the bone repair in rat calvaria in comparison to autogenous bone. Critical size defect in the calvaria was filled with the graft material and the samples were harvested at the 30, 90 and 180 days. The light microcopy observations showed the biocompatibility of the graft materials. In the Zn-HA group the area of neoformed bone was larger than in the HA group, but smaller than in the autograft. A fibrous connective tissue was more evident around HA granules. It could be conclude that the presence of zinc ions in HA crystal accelerated the osteogenesis and increased the area of newly formed bone in relation to HA.

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Periodical:

Key Engineering Materials (Volumes 361-363)

Pages:

1273-1276

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.361-363.1273

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Online since:

November 2007

Authors:

Monica Calasans-Maia, G.V.O. Fernandes, Antonella M. Rossi, Eliane Pedra Dias, G.D.S. Almeida, F.F. Mitri, José Mauro Granjeiro

Keywords:

Autograft, Bone Repair, Critical-Sized Defect, Hydroxyapatite (HAP), Light Microscopy, Osteoconduction, Rat Calvarium , Zinc Containing Hydroxyapatite

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© 2008 Trans Tech Publications Ltd. All Rights Reserved

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