TEM Examinations of OCP/HA Transformation

Ren Long Xin; Yang Leng; Ning Wang

doi:10.4028/www.scientific.net/KEM.309-311.191

Paper Titles

Synthesis and Evaluation of Amorphous Calcium Phosphate (ACP) by Various Synthesis Methods
p.175

Influence of Phosphate Ions on the Stability of Amorphous Calcium Carbonate
p.179

Evaluation of Natural Calcium Carbonate with Surface Modification as a Bone Graft Substitute
p.183

The Effects of Autograft and Calcium Carbonate on the Periodontal Healing of 3-Wall Intrabony Defects in Dogs
p.187

TEM Examinations of OCP/HA Transformation
p.191

Influence of Alginate on Precipitation of Calcium Phosphates
p.195

Effects of pH on the Transformation of Gypsum to Carbonate Apatite in the Presence of Ammonium Hydrogen Phosphate
p.199

Effects of Paste Type Calcium Sulfate on the Periodontal Healing of 3-Wall Intrabony Defects in Dogs
p.203

Osteoblastic Response to Resorbed Ceramic Surfaces; The Role of the Osteoclast in Osteoconduction
p.207

HomeKey Engineering MaterialsKey Engineering Materials Vols. 309-311TEM Examinations of OCP/HA Transformation

TEM Examinations of OCP/HA Transformation

Abstract:

We have directly observed the transformation from octacalcium phosphate (OCP) to hydroxyapatite (HA) in transmission electron microscope (TEM). The phase transformation was induced by electron beam irradiation in TEM. Several TEM techniques were employed to examine the crystal structure change, including bright field images, electron diffraction, high resolution microscopy (HRTEM) and fast Fourier transformation pattern of HRTEM images. The examinations indicate possible hydrolysis reaction in solid state transformation and crystallographic orientation of OCP (010)//HA (010) and OCP (001)//HA (001) which has not been reported previously.