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Título : Incorporation of 2nd and 3rd Generation Bisphosphonates on Hydroxyfluorapatite
Autor : Rodríguez-Lorenzo, Luis M., Vázquez Lasa, Blanca, San Román, Julio, Gross, K. A.
Palabras clave : bisphosphonates
surface modification
Fecha de publicación : 2006
Editor: Trans Tech Publications
Resumen: Bisphosphonates (BPs) may play an important role in minimizing osteolysis. In this work two new bisphosphonates pertaining to second and third generations respectively, have been synthesized and incorporated onto a chemically enriched hydroxyapatite. BP synthesis has been performed by adding H3PO3, PCl3 and methanesulfonic acid over 4-aminophenyl acetic acid (APBP) and 1-H-indole-3-acetic acid (IBP) respectively at 65ºC in a N2 atmosphere. These compounds bear a primary amine group bonded to an aromatic ring, and a secondary amine group within a heterocyclic ring respectively. A chemically enriched hydroxyapatite with a chemical content corresponding to a 50% fluorided hydroxyapatite has been synthesized. Ceramic bodies manufactured by uniaxial pressure followed by cold isostatic press have a 97% density and submicron grain size. The BP was adsorbed onto the surface by immersion in a stirred solution at 37ºC for 48 hours. A 10-fold decrease of the surface energy was observed for bodies modified with the APBP whereas only a 25 % decrease is obtained for bodies loaded with the bisphosphonate loaded with the IBP
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ISSN: 1013-9826
DOI: 10.4028/
Citación : Key Engineering Materials 309-311: 899-902 (2006)
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