scholarly journals In Vitro Bioactivity Studies of Sol-Gel Derived Dental Ceramics/Bioactive Glass Composites in Periodically Renewed Biomimetic Solution

2011 ◽  
Vol 1 ◽  
pp. 1-4 ◽  
Author(s):  
O. M. Goudouri ◽  
E. Kontonasaki ◽  
A. Theocharidou ◽  
L. Papadopoulou ◽  
X. Chatzistavrou ◽  
...  
Author(s):  
Amirhossein Moghanian ◽  
Saba Nasiripour ◽  
Atiyyeh Koohfar ◽  
Mohammad Sajjadnejad ◽  
SeyedMohammad Hosseini ◽  
...  

2013 ◽  
Vol 19 (2) ◽  
pp. 231-239 ◽  
Author(s):  
Nima Nabian ◽  
Maedeh Delavar ◽  
Mahmood Rabiee ◽  
Mohsen Jahanshahi

The paper reports the first attempt at changing cooling treatment of synthesizing method in order to investigate its effect on the physical properties of sol-gel derived nano bioactive glass-ceramic in the system 58SiO2-33CaO-9P2O5 (wt.%). We hypothesized that the method of cooling may affect the properties of nano bioactive glass-ceramic. To test this hypothesis, two different method of cooling treatment was applied after calcinations in synthesizing method. Both quenched and unquenched nano bioactive glass-ceramics were soaked in Ringer?s solution with bovine serum albumin (BSA) for bioactivity evaluation. The obtained samples were analyzed for their composition, crystalinity and morphology through X-ray powder diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), surface electron microscope (SEM) and transmission electron microscope (TEM). The SEM images showed that the morphology of nano bioactive glass-ceramics was completely changed by quenching process. Results of in vitro bioactivity evaluation revealed that the unquenched attains faster apatite formation ability than the quenched sample. Other properties of these two morphologically different nano bioactive glass-ceramics were strongly discussed.


2011 ◽  
Vol 493-494 ◽  
pp. 49-54 ◽  
Author(s):  
George S. Polymeris ◽  
Ourania Menti Goudouri ◽  
Konstantinos M. Paraskevopoulos ◽  
George Kitis

Results of the present study provide strong indications towards the effective application of the 110oC Thermoluminescence (TL) peak in discriminating between different bioactive responses for the case of the 58S bioactive glass. The in vitro bioactivity of this glass in the form of powder in SBF solution was tested for various immersion times, ranging between 0 and 6 days. This TL peak is ubiquitously present in all 58S samples, for all immersion times. The intensity of the110oC TL peak was proven to be very sensitive to the different bioactive responses, indicating a strongly decreasing pattern with increasing immersion time in SBF, easily identifying thus the loss of silica. This loss is reflected to the decrease of the 110oC TL peak intensity, which appears to be fast even for the shorter immersion times. The 110oC TL glow peak intensity and sensitization could also be yielding a time scale regarding the beginning of some among the several stages included in the bioactivity sequence.


Materialia ◽  
2018 ◽  
Vol 4 ◽  
pp. 361-366 ◽  
Author(s):  
Chandra Khatua ◽  
Subhadip Bodhak ◽  
Biswanath Kundu ◽  
Vamsi Krishna Balla

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