TITLE:
Dielectric Property Studies of Biologically Compatible Brushite Single Crystals Used as Bone Graft Substitute
AUTHORS:
M. P. Binitha, P. P. Pradyumnan
KEYWORDS:
Bone Grafts; Brushite; Gel Growth; Dielectric Properties; AC Conductivity
JOURNAL NAME:
Journal of Biomaterials and Nanobiotechnology,
Vol.4 No.2,
April
17,
2013
ABSTRACT: The electrical characterization of
bone is essential for the better understanding of the role of electrical
stimulation in bone remodeling. Calcium Hydrogen Phosphate Dihydrate or
brushite (CaHPO4 2H2O) has been used in bone substitution owing to their fast resorption
under physiological condition. Brushite is a suitable matrix for
osteoconductive bone grafts. In this work, Calcium Hydrogen Phosphate single
crystals have been grown by single diffusion gel growth technique. The powder XRD studies revealed
the monoclinic structure of the grown crystals. The vibrational analysis of the
crystals is done with FTIR spectroscopy and the major functional groups and
their assigned vibrations are discussed. The frequency dependence of dielectric
constant and ac conductivity at different temperatures have been studied in detail. This study shows decrease in the
dielectric constant with the increase in frequency and temperature. The variation
of ac conductivity is found to be increasing with frequency and decreasing with
temperature.