Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.


Issue 10, 2010
Previous Article Next Article

Investigation of the hydroxyapatite obtained as hydrolysis product of α-tricalcium phosphate by transmission electron microscopy

Author affiliations

Abstract

Alpha tricalcium phosphate (α-TCP) is widely used as a reactant in many calcium phosphate cements, where the setting reaction occurs through its hydrolysis to a calcium deficient hydroxyapatite (CDHA), at room or body temperature. Transmission electron diffraction studies of cement single CDHA crystals produced at 37 °C have revealed the systematic presence of unexpected diffraction spots other than those assigned to the archetypal P63/m apatite. Three possible causes can explain the existence of these extra spots: electron beam irradiation damage (inducing phase transformation to monoclinic apatite), presence of octacalcium phosphate (OCP) and presence of monoclinic apatite in the hydrolyzed product. Determination of the occurrence of any of these phases would have great implications in the properties of the hydrolyzed product. However, the identification of their corresponding electron diffraction patterns is not straightforward due to coincidental spots under basal zone axis orientation. In the present work, off-zone axis electron diffraction in the transmission electron microscope, TEM, has been used for phase identification, clearly indicating the presence of the monoclinic apatite phase. These findings could be a strong asset reinforcing the possibility of the monoclinic phase as a constituent of hard bone tissue.

Graphical abstract: Investigation of the hydroxyapatite obtained as hydrolysis product of α-tricalcium phosphate by transmission electron microscopy

Back to tab navigation

Article information


Submitted
26 Jan 2010
Accepted
05 May 2010
First published
30 Jun 2010

CrystEngComm, 2010,12, 3318-3326
Article type
Paper

Investigation of the hydroxyapatite obtained as hydrolysis product of α-tricalcium phosphate by transmission electron microscopy

M. Espanol, J. Portillo, J. Manero and M. Ginebra, CrystEngComm, 2010, 12, 3318
DOI: 10.1039/C001754J

Social activity

Search articles by author

Spotlight

Advertisements