Bovine Hydroxyapatite (BHA) Strontium Oxide Composites

2008 ◽  
Vol 396-398 ◽  
pp. 407-410 ◽  
Author(s):  
Oguzhan Gunduz ◽  
L.S. Ozyegin ◽  
Sergey V. Dorozhkin ◽  
Onur Meydanoglu ◽  
Niyazi Eruslu ◽  
...  
Keyword(s):  
Compression Strength ◽  
Pore Formation ◽  
Sintering Temperature ◽  
Bovine Bone ◽  
Strontium Oxide ◽  
Time Saving ◽  
Natural Sources ◽  
Bovine Hydroxyapatite ◽  
Oxide Composites ◽  
Scanning Electron

Composites of calcinated bovine bone derived hydroxyapatite (HA) with 5 and 10 wt % SrCO3 were prepared by sintering. The production of HA from natural sources is preferred due to money and time saving reasons. In this study scanning electron microscopy (SEM) investigations and together with measurements of microhardness, density, and compression strength were performed. The experimental results indicated that compression strength and microhardness values of HA-Sr-oxide composites decrease when the content of SrCO3 and sintering temperature increase. The best compression strength values were achieved after sintering at 1000°C. It was seen that at higher temperatures the compression strength and the microhardness values decrease due to the pore formation. The pore formation is very important for scaffold formation for tissue engineering purposes.

Bovine Hydroxyapatite (BHA) Boron Oxide Composites

2008 ◽  
Vol 396-398 ◽  
pp. 403-406 ◽  
Author(s):  
Oguzhan Gunduz ◽  
L.S. Ozyegin ◽  
Sergey V. Dorozhkin ◽  
Onur Meydanoglu ◽  
Niyazi Eruslu ◽  
...  
Keyword(s):  
Boric Acid ◽  
Compression Strength ◽  
Boron Oxide ◽  
Pore Formation ◽  
Sintering Temperature ◽  
Bovine Bone ◽  
Time Saving ◽  
Natural Sources ◽  
Bovine Hydroxyapatite ◽  
Oxide Composites

Composites of calcinated bovine bone derived hydroxyapatite (HA) with 5, 7.5 and 10 wt % B2O3 were prepared by sintering. The production of HA from natural sources is preferred due to economical and time saving reasons. In this study scanning electron microscopy (SEM) investigations, microhardness and compression strength measurements were performed on composites. The experimental results indicated that compression strength and microhardness of HA-boron-oxide composites decrease when the content of boric acid and sintering temperature increase. The best mechanical properties achieved for 5 wt % addition of dehydrated boric acid. It was seen that at higher sintering temperatures, the compression strength and the microhardness decrease due to the very intensive pore formation. The results agree fairly well with microstructure analysis.

Improvement of Microstructure of Bovine Hydroxyapatite (BHA) by Doping with Calcium Fluoride

2007 ◽  
Vol 330-332 ◽  
pp. 43-46
Author(s):  
L.S. Ozyegin ◽  
Faik N. Oktar ◽  
Simeon Agathopoulos ◽  
S. Salman ◽  
Y. Bozkurt ◽  
...  
Keyword(s):  
Compression Strength ◽  
Calcium Fluoride ◽  
Sintering Temperature ◽  
Bovine Bone ◽  
X Ray Diffraction ◽  
Time Saving ◽  
Natural Sources ◽  
X Ray ◽  
Bovine Hydroxyapatite ◽  
Scanning Electron

Composites of calcinated bovine bone derived hydroxyapatite (BHA) doped 0.5 and 1 wt% CaF2 were prepared by sintering. The production of BHA from natural sources is preferred due to money and time saving reasons. Scanning electron microscopy (SEM) and X-ray diffraction analysis together with measurements of density and compression strength were carried out in the produced samples. The experimental results indicated that compression strength of the composites increase when sintering temperature increases. The best compression strength was achieved after sintering at 1200°C for 0.5% CaF2 addition. The results are in agreement with densification measurements and microstructure analysis. With regards to the amount of CaF2, the results indicate that small additions of F, lower than 0.5%, can further improve the mechanical properties of HA.

Improvement of Microstructure of Bovine Hydroxyapatite with Yttria

2007 ◽  
Vol 330-332 ◽  
pp. 47-50
Author(s):  
L.S. Ozyegin ◽  
S. Salman ◽  
Faik N. Oktar ◽  
Simeon Agathopoulos ◽  
Onur Meydanoglu ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Bovine Bone ◽  
X Ray Diffraction ◽  
Time Saving ◽  
Natural Sources ◽  
X Ray ◽  
Study Results ◽  
Bovine Hydroxyapatite ◽  
Scanning Electron

Composites of calcinated bovine bone derived hydroxyapatite (HA) with 0.5 and 1 wt% Y2O3 were prepared by sintering. Money and time saving feature the production of HA from natural sources. In this study, results of scanning electron microscopy (SEM) and X-ray diffraction analysis aimed to interpret the results of measurements of densification, microhardness, and compression strength of the produced composites. The best mechanical properties were achieved after sintering at 1200°C for compressive strength and 1300°C for microhardness. The results are in a fair agreement with densification measurements and microstructure analysis.

Sintering Effect on Mechanical Properties of Composites Made of Bovine Hydroxyapatite (BHA) and Commercial Inert Glass (CIG)

2007 ◽  
Vol 330-332 ◽  
pp. 189-192 ◽  
Author(s):  
S. Salman ◽  
Faik N. Oktar ◽  
Oguzhan Gunduz ◽  
Simeon Agathopoulos ◽  
M. Lutfy Öveçoğlu ◽  
...  
Keyword(s):  
Compression Strength ◽  
Biomedical Applications ◽  
Bovine Bone ◽  
X Ray Diffraction ◽  
Time Saving ◽  
X Ray ◽  
Ecological Aspects ◽  
Bovine Hydroxyapatite ◽  
Potential Use ◽  
Properties Of Composites

Composite biomaterials of calcinated bovine bone derived hydroxyapatite (HA) doped with 5 and 10 wt% commercial inert glass (CIG) were prepared by sintering. The production of HA from natural sources satisfies economic and time-saving aims, while the use of CIGs is directed by economic and ecological aspects. The produced composites were subjected to scanning electron microscopy (SEM) and X-ray diffraction analysis. Measurements of compression strength, microhardness, and density were also carried out. The experimental results and their discussion showed that the type and the composition of incorporated glass are of crucial importance. Consequently, provided that an optimum amount of glass is incorporated, the resultant materials can exhibit good values of compression strength and microhardness and hence they can be suggested for potential use in load-bearing biomedical applications.

Influence of Sintering Temperature on Mechanical Properties of Biologically Derived Hydroxyapatite Bodies

2006 ◽  
Vol 309-311 ◽  
pp. 45-48 ◽  
Author(s):  
Faik N. Oktar ◽  
H. Aydin ◽  
Gültekin Göller ◽  
Simeon Agathopoulos ◽  
G. Rocha ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Scanning Electron Microscopy ◽  
Sintering Temperature ◽  
X Ray Diffraction ◽  
Time Saving ◽  
Natural Sources ◽  
X Ray ◽  
Calcination Method ◽  
Scanning Electron

The properties of sintered hydroxyapatite (HA), obtained from bovine femoral shafts via calcination method, were investigated utilizing scanning electron microscopy (SEM) and X-ray diffraction analysis together with measurements of microhardness, density, and compression strength. The production of HA from natural sources is preferred due to money and time saving reasons. The results indicate the new HA materials as promissing in biomedicine, since similar mechanical behaviour was obtained with previous studies.

Sintering Effect on Mechanical Properties of Composites of Hydroxyapatite Lanthanum Oxide (HA-La2O3)

2006 ◽  
Vol 309-311 ◽  
pp. 101-104 ◽  
Author(s):  
Faik N. Oktar ◽  
L.S. Ozyegin ◽  
Onur Meydanoglu ◽  
H. Aydin ◽  
Simeon Agathopoulos ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Compression Strength ◽  
Temperature Increase ◽  
Lanthanum Oxide ◽  
Sintering Temperature ◽  
Experimental Results ◽  
Microstructure Analysis ◽  
Bovine Bone ◽  
Properties Of Composites ◽  
Sintering Effect

Composites of calcinated bovine bone derived hydroxyapatite (HA) with 0.25, 0.5, 1, and 2 wt % La2O3 were prepared by sintering. The experimental results indicated that compression strength and microhardness of HA-La2O3 composites increase when the content of La2O3 and sintering temperature increase. The best mechanical properties were achieved after sintering at 1300°C. The results are in agreement with densification measurements and microstructure analysis.

Hydroxyapatite Nano-Barium-Strontium-Titaniumoxide Composites

2011 ◽  
Vol 484 ◽  
pp. 204-209 ◽  
Author(s):  
N. Demirkol ◽  
Eyup Sabri Kayali ◽  
Mehmet Yetmez ◽  
F.N. Oktar ◽  
Simeon Agathopoulos
Keyword(s):  
Titanium Oxide ◽  
Compression Strength ◽  
Sintering Temperature ◽  
Bovine Bone ◽  
Strontium Titanium Oxide ◽  
Barium Strontium ◽  
Load Carrying ◽  
Different Temperatures ◽  
Density Values ◽  
Mechanical And Microstructural Properties

The aim of this study is to produce and to investigate the mechanical and microstructural properties of composite materials made of hydroxyapatite, obtained from natural bovine bone and nano barium strontium titanium oxide (5 and 10 wt%). Compositions were mechanical alloyed and compacted to pellets. The samples were subjected to sintering at different temperatures between 1000oC and 1300oC. Compression strength, Vickers microhardness as well as density were measured. SEM and X-ray diffraction studies were also conducted. With increasing sintering temperature, microhardness, compression strength and density of composites increased. With increasing addition of nano barium strontium titanium oxide (BST) to bovine hydroxyapatite (BHA), microhardness values of composites decreased at all sintering temperatures, but compression strength and density values of composites showed different tendency. Compression strengths of BHA-composites at low sintering temperatures were nearly the same, but their compression strengths at high sintering temperatures decreased with increasing nano BST addition. The best mechanical properties were obtained at 1300°C sintering temperature with BHA-5wt% nano BST. Microhardness and compression strengths values of these nano–oxide composites are generally higher than that BHA-composites produced by traditional methods. Adding of nano-oxides to BHA could be a valuable method to produce rigid and high load carrying ability when compared with BHA-composites produced by conventional methods. Nano-HA and nano-oxides composites could be even better. Those nano-nano studies are still in progress.

Improvement of Microstructure of Bovine Hydroxyapatite (BHA) with Machineable Fluorapatite Glass (MFG)

2007 ◽  
Vol 361-363 ◽  
pp. 495-498 ◽  
Author(s):  
Oguzhan Gunduz ◽  
S. Salman ◽  
S. Kayali ◽  
Gultekin Goller ◽  
I. Goker ◽  
...  
Keyword(s):  
Compression Strength ◽  
Bovine Bone ◽  
Bovine Hydroxyapatite ◽  
Positive Effect

Composites of calcinated bovine bone derived hydroxyapatite (BHA) doped with 5 wt% and 10 wt% machineable fluorapatite glass (MFG) were prepared by sintering. Microstructure observations and measurements of density, compression strength and microhardness indicated a positive effect of MFG-doping to BHA. The highest compression strength (59.7 MPa) was achieved after sintering at 1300°C for 5% MFG. In the light of results of earlier similar studies, the paper discusses the features of the potential of BHA-MFG composites in biomedical practice.

Preparation and Characterization of Natural Hydroxyapatite: A Comparative Study of Bovine Bone Hydroxyapatite and Hydroxyapatite from Calcite

2007 ◽  
Vol 561-565 ◽  
pp. 1441-1444 ◽  
Author(s):  
M.K. Herliansyah ◽  
D.A. Nasution ◽  
Mohd Hamdi Bin Abdul Shukor ◽  
A. Ide-Ektessabi ◽  
Muhammad Waziz Wildan ◽  
...  
Keyword(s):  
Comparative Study ◽  
Hydrothermal Method ◽  
Hardness Test ◽  
Bovine Bone ◽  
Test Results ◽  
Natural Sources ◽  
Bovine Hydroxyapatite ◽  
Natural Hydroxyapatite

The production of natural hydroxyapatite (HAp) specifically from cortical bovine bones and natural calcite was studied in this paper. Bovine hydroxyapatite (BHA) was produced from bovine bone in bulk form by de-fatting continued with calcination at 900°C. Natural calcite hydroxyapatite (CHA) was produced by hydrothermal method. It was confirmed from XRD, FTIR, and SEM results that HA have been successfully produced from natural sources like bulk bovine bone and natural calcite. The results also show that the crystallinity of BHA is higher than CHA, matching with the hardness test results of sintered BHA and CHA.

scholarly journals Karakterisasi Material Biokomposit Bovine Hidroksapatit (BHA)/Shellac dan Kitosan Sebagai Material Bone Filler

ROTASI ◽  
2017 ◽  
Vol 19 (2) ◽  
pp. 82
Author(s):  
Junaidi Rasid ◽  
Joko Triyono ◽  
Teguh Triyono
Keyword(s):  
Bovine Bone ◽  
Test Results ◽  
X Ray Diffraction ◽  
Calcination Process ◽  
X Ray ◽  
Medical Needs ◽  
Bone Filler ◽  
Bone Powder ◽  
Bovine Hydroxyapatite ◽  
Scanning Electron

Development of composite materials is growing rapidly to support medical needs. Biocomposite was made from bovine bone powder/shellac/chitosan for bone filler applications. Biocomposite of BHA(Bovine Hydroxyapatite)/shellac/chitosan was derived of bovine bone powder coated with shellac 10 ml. Mixed variation between BHA/shellac and chitosan i.e 30:40, 40:60, 50:50, 60:40, 70:30 %wt  were synthesized by dry method. Samples of BHA/shellac/chitosan were compacted with the pressure 60 bar until becomes solid with the cylinder mold 13 mm and 8 mm in thickness, the calcination process on temperature of  900ºC for 2 hours and increased temperature is 10ºC/min. Test XRD (X-Ray Diffraction), Microvickers, DTS (Diametric Tensile Strength) and SEM (Scanning Electron Microschopy), Density, and Porosity. XRD test results showed that bovine powder has become BHA (Bovine Hydroxyapatite), microvickers test of sample BHA/shellac/chitosan for maximum was 7.47 ± 0.685 VHN and 0.182 ± 3.73 VHN for minimum, DTS test of sample BHA/shellac/chitosan maximum at 36.66 ± 9.01 KPa and minimum at 13.90 ± 1.24 KPa. Porous observations with SEM toward sample BHA/shellac/chitosan porous size and number of samples contained at BHA/shellac/chitosan is 70:30 wt%. Density test with  highest value was 1,168gr/cm3, and lowest 1,070 gr/cm3. Highest porosity value at variation 50/50 %wt = 0,988%, and the lowest at 70/30 %wt = 0,977%

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