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Technical Articles - Biomaterials Archives

	Bioreactivity of Titanium Implant Alloys [Updated: 08/20/2005] [Filesize: 125K] A study was conducted regarding the adsorption of peptides on commercially pure (cp) Ti and Ti-6Al-4V. The peptides were based upon the group RGD, arginine-glycine-aspartic acid, known to be important for biologically specific adhesion reactions. Coupons of the titanium alloys were inserted into variable concentration solutions of the peptide under constant time and temperature conditions. Adsorption isotherms were plotted. It was postulated through x-ray photoelectron spectroscopy (XPS) data that the major adhesion mechanism for the peptides to the titanium alloys was via hydrogen bonding.
	XPS and XRD of Oxides on Dental Alloys [Updated: 08/20/2005] [Filesize: 117K] X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD) were used to analyze the oxide layer on three palladium-gallium-based dental casting alloys. The complementary techniques helped to show different mechanisms were responsible for oxide growth, dependent upon the alloy composition.
	XRD of Pd Dental Alloys [Updated: 08/20/2005] [Filesize: 2,086K] X-ray diffraction (XRD) was used to obtain new information about the oxide layers on four representative oxidized high palladium alloys. The alloys also contained gallium and sometimes copper. Cast specimens were subjected to oxidation procedures recommended by the manufactures before the analysis.
	Electronic Immunoassay Patent [Updated: 08/15/2005] [Filesize: 749K] This patent describes an electronic endpoint for immunassays. The initial inventor on the patent is the current president of Material Interface, Inc.