The increase of apatite layer formation by the poly(3-hydroxybutyrate) surface modification of hydroxyapatite and β-tricalcium phosphate

2014 ◽  
Vol 34 ◽  
pp. 236-244 ◽  
Author(s):  
M. Szubert ◽  
K. Adamska ◽  
M. Szybowicz ◽  
T. Jesionowski ◽  
T. Buchwald ◽  
...  
Keyword(s):  
Surface Modification ◽  
Tricalcium Phosphate ◽  
Apatite Layer ◽  
Layer Formation

Surface Modification of Nanosized Biphasic α-TCP/HA Powders

2007 ◽  
Vol 330-332 ◽  
pp. 223-226 ◽  
Author(s):  
Li Li Pan ◽  
Yan Bao Li ◽  
Chao Zou ◽  
Wen Jian Weng ◽  
Kui Cheng ◽  
...  
Keyword(s):  
Surface Modification ◽  
Stearic Acid ◽  
Tricalcium Phosphate ◽  
Calcium Phosphates ◽  
Biological Characteristics ◽  
Buffer Solution ◽  
Solution Ph

Stearic acid was utilized to modify biphasic alpha-tricalcium phosphate (α-TCP)/hydroxyapatite (HA) powders in the ethanol. The results showed that the dispersion of biphasic α-TCP/HA powders (BCPs) in non-polar matrix improved. And the released content of Ca2+ and PO4 3- of the BCPs soaked in the NaAc-HAc buffer solution (pH 5.0) was almost same as that before modification. Stearic acid could modify the suface properties of BCPs and would not obviously affect their biological characteristics, which affords a good groundwork of application of calcium phosphates powders.

Effect of Glass Ceramic Crystallinity on the Formation of Simulated Apatite Layers

2006 ◽  
Vol 514-516 ◽  
pp. 1039-1043 ◽  
Author(s):  
Nuno A.F. Almeida ◽  
Maria Helena F.V. Fernandes
Keyword(s):  
Glass Ceramics ◽  
Apatite Layer ◽  
Silicate Glasses ◽  
Layer Formation ◽  
Volume Percent ◽  
Base Glass ◽  
Heat Treated ◽  
Phosphate Phase ◽  
Calcium Magnesium ◽  
Kinetics Of

In silicate glasses the kinetics of apatite layer formation is usually rapid but the adhesion to the base glass is poor. Glass ceramics promote a stronger bonding between layer and substrate but decrease the rate of the apatite layer formation. In this work a glass of composition (wt%) 54,89%C3P-24,81%SiO2-20,30%MgO has been studied. This glass was heat treated at four temperatures (840 °C, 870 °C, 890 °C and 910 °C) to obtain glass ceramics with different contents of the same crystalline phase. A calcium magnesium phosphate phase was formed in all glass ceramics in a volume percent increasing with temperature. The apatite layer precipitated after immersion in simulated body fluid (SBF) formed faster on the glass than on the glass ceramics and a decrease in the amount of apatite formed was observed with the increase in crystallinity. It was generally concluded that heat treatment can turn a reactive glass into glass ceramics of different surface behaviors, from bioactive to quasi bio inert materials.

Biomimetic apatite layer formation on a novel citrate starch scaffold suitable for bone tissue engineering applications

2016 ◽  
Vol 68 (11-12) ◽  
pp. 1275-1281 ◽  
Author(s):  
Jhamak Nourmohammadi ◽  
Sepideh Shahriarpanah ◽  
Negin Asadzadehzanjani ◽  
Shila Khaleghpanah ◽  
Shafagh Heidari
Keyword(s):  
Tissue Engineering ◽  
Bone Tissue Engineering ◽  
Bone Tissue ◽  
Apatite Layer ◽  
Layer Formation ◽  
Engineering Applications ◽  
Biomimetic Apatite
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