IFLYSIB   05383
INSTITUTO DE FISICA DE LIQUIDOS Y SISTEMAS BIOLOGICOS
Unidad Ejecutora - UE
artículos
Título:
Dielectric properties of natural and demineralised collagen bone matrix
Autor/es:
IRASTORZA, RAMIRO M.; MAYOSKY, MIGUEL; GRIGERA, J. RAÚL; VERICAT, FERNANDO
Revista:
IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION
Editorial:
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Referencias:
Año: 2010
ISSN:
1070-9878
Resumen:
In this paper, measurements of dielectric properties of fluid-saturated cortical andtrabecular bovine bones are presented. Results are reported for native and demineralized states from 80MHz to 1GHz. A non invasive technique using openended coaxial lines is proposed, and compared to invasive configurations. Measurements are performed in time domain and data are processed using systemidentification techniques in continuous and discrete domains. These are very interesting tools for signal processing when working with time domain spectroscopy data. As a validation test for the system identification technique, data are also obtained in the frequency domain. A clear evidence of relaxation processes around 0.2 to 0.4GHz is shown, which may be due to the movement of polar side chains of the collagen fibers. A strong difference between the dielectric properties of native and demineralized bones was found. The experiments here reported aim to contribute to a more in-depth knowledge of the relaxation processes due to the fully hydrated collagen matrix and its relation to the mineralized phase.