Diaphyseal fractures treated by polylactide and hydroxyapatite pins. Experimental study in rat

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dc.contributor.author El Hayek, T.
dc.contributor.author Griffet, J.
dc.contributor.author Odin, G.
dc.contributor.author Pebeyre, B.
dc.contributor.author Accorsi, E.
dc.date.accessioned 2016-09-20T12:45:30Z
dc.date.available 2016-09-20T12:45:30Z
dc.date.copyright 1999 en_US
dc.date.issued 2016-09-20
dc.identifier.issn 0957-4530 en_US
dc.identifier.uri http://hdl.handle.net/10725/4327
dc.description.abstract Hydroxyapatite (HAp) coatings were deposited onto substrates of metal biomaterials (Ti, Ti6Al4V, and 316L stainless steel) by electrophoretic deposition (EPD). Only ultra-high surface area HAp powder, prepared by the metathesis method 10Ca(NO3)2 + 6(NH4)2HPO4 + 8NH4OH), could produce dense coatings when sintered at 875–1000°C. Single EPD coatings cracked during sintering owing to the 15–18% sintering shrinkage, but the HAp did not decompose. The use of dual coatings (coat, sinter, coat, sinter) resolved the cracking problem. Scanning electron microscopy/energy dispersive spectroscopy (SEM/EDS) inspection revealed that the second coating filled in the “valleys” in the cracks of the first coating. The interfacial shear strength of the dual coatings was found, by ASTM F1044-87, to be ∼12 MPa on a titanium substrate and ∼22 MPa on 316L stainless steel, comparing quite favorably with the 34 MPa benchmark (the shear strength of bovine cortical bone was found to be 34 MPa). Stainless steel gave the better result since α-316L (20.5 μm mK-1) > α-HAp (∼14 μm mK-1), resulting in residual compressive stresses in the coating, whereas α-titanium (∼10.3 μm mK-1) < α-HAp, resulting in residual tensile stresses in the coating. © 1999 Kluwer Academic Publishers en_US
dc.language.iso en en_US
dc.title Diaphyseal fractures treated by polylactide and hydroxyapatite pins. Experimental study in rat en_US
dc.type Article en_US
dc.description.version Published en_US
dc.author.school SOM en_US
dc.author.idnumber 201205678 en_US
dc.author.department N/A en_US
dc.description.embargo N/A en_US
dc.relation.journal Journal of Materials Science: Materials in Medicine en_US
dc.journal.volume 10 en_US
dc.journal.issue 7 en_US
dc.article.pages 411-418 en_US
dc.keywords Shear Strength en_US
dc.keywords Hydroxyapatite en_US
dc.keywords Residual Compressive Stress en_US
dc.keywords Interfacial Shear en_US
dc.keywords Metathesis en_US
dc.identifier.doi http://dx.doi.org/10.1023/A:1008975014015 en_US
dc.identifier.ctation Griffet, J., Chevallier, A., El Hayek, T., Odin, G., Pebeyre, B., & Accorsi, E. (1999). Diaphyseal fractures treated by polylactide and hydroxyapatite pins. Experimental study in rat. Journal of Materials Science: Materials in Medicine, 10(7), 411-418. en_US
dc.author.email toni.hayek@lau.edu.lb en_US
dc.identifier.tou http://libraries.lau.edu.lb/research/laur/terms-of-use/articles.php en_US
dc.identifier.url http://link.springer.com/article/10.1023/A:1008975014015 en_US

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