Characterization of a calcium phosphate–TiO2 nanotube composite layer for biomedical applications

2011 ◽  
Vol 31 (5) ◽  
pp. 906-914 ◽  
Author(s):  
A. Roguska ◽  
M. Pisarek ◽  
M. Andrzejczuk ◽  
M. Dolata ◽  
M. Lewandowska ◽  
...  
Keyword(s):  
Calcium Phosphate ◽  
Biomedical Applications ◽  
Composite Layer ◽  
Tio2 Nanotube

scholarly journals Synthesis and characterization of nanostructured ceramics powders for biomedical applications

2007 ◽  
Vol 12 (4) ◽  
pp. 574-582 ◽  
Author(s):  
Nelson Heriberto de Almeida Camargo ◽  
O. J. Bellini ◽  
Enori Gemelli ◽  
M. Tomiyama
Keyword(s):  
Calcium Phosphate ◽  
Nanostructured Materials ◽  
Biomedical Applications ◽  
Calcium Phosphates ◽  
Morphological Characterization ◽  
Synthesis And Characterization ◽  
Powder Synthesis ◽  
Mineralogical Characteristics ◽  
Nanostructured Ceramics

Nanostructured materials have been largely studied in the last few years because they have a great potential to applications in different fields like physics, chemistry, biology, mechanic and medicine. Synthesis and characterization of nanostructured materials is a subject of great interest involving science, market, politicians, government and society. The nanostructured materials are in demand in biomedical area, mainly the bioceramics composed of calcium phosphates (Ca/P), which have an excellent biocompatibility and mineralogical characteristics similar to those of bones. The aim of this work was to optimize the method of powder synthesis of nanostructured calcium phosphate and of nanocomposites composed of calcium phosphate//SiO2n, containing 5, 10 and 15% (in volume) of nanometric silica (SiO2n). The results are expressed according to the method of synthesis, mineralogical and morphological characterization, and thermal behavior for the different compositions of the nanostructured powder synthesized.

Study and Characterization of Powders Nanocomposites Calcium Phosphate/Silica-Gel (SiO2n) Obtained from Attrition Milling: For Biomedical Applications

2008 ◽  
Vol 396-398 ◽  
pp. 615-618
Author(s):  
Rodrigo Brandão ◽  
Fernando Pupio ◽  
Nelson Heriberto A. Camargo ◽  
E. Gemelli
Keyword(s):  
Calcium Phosphate ◽  
Silica Gel ◽  
Biomedical Applications ◽  
Bone Matrix ◽  
Synthesis And Characterization ◽  
X Ray Diffraction ◽  
X Ray ◽  
Attrition Milling ◽  
Bone Calcium

The bioceramics nanostructured have made important characteristics in biomedical applications, especially the calcium phosphate ceramics. The aim of this work is synthesis and characterization of calcium phosphate and nanocomposites powders, the method of dissolution of CaO in liquid medium, precipitation and formation of bone calcium phosphate matrix, and nanocomposites by adding the solution of phosphoric acid (H3PO4). The nanocomposites powders were synthesized using as strengthening silica gel nanometer (20nm) at concentrations of 1%, 2%, 3% and 5% by volume and subjected to heat treatment to 900°C for 2 hours, seeking obtained HA (Hydroxyapatite). Later the bone matrix of calcium phosphate and nanocomposites powders were subjected from process attrition milling for 2 hours, by way of comparison. The studies characterizations were conducted through the technique of X-ray diffraction, scanning electron microscopy (SEM) and dilatometric test.

Synthesis and Characterization of Hydrated Calcium Phosphate: Precursors for Obtaining Biocements

2014 ◽  
Vol 798-799 ◽  
pp. 443-448
Author(s):  
Priscila Ferraz Franczak ◽  
Nelson Heriberto Almeida Camargo ◽  
Pricyla Corrêa ◽  
Enori Gemelli
Keyword(s):  
Calcium Phosphate ◽  
Biomedical Applications ◽  
Fine Particles ◽  
Calcium Phosphates ◽  
Synthesis Method ◽  
Synthesis Process ◽  
Promising Alternative ◽  
Hydrated Calcium ◽  
Reactive Method

Calcium phosphates biocements are biomaterials that present crystallographic and mineralogical characteristics similar to human skeletal structure. This has led to the development of new calcium phosphates biomaterials for biomedical applications, especially biomaterials for repairing defects and bone reconstruction. Calcium phosphates biocements are a promising alternative in biomedical applications, for they are easy to mold, they have good wettability, hydration and hardening capacity during its application in biological means. This work aimed at the synthesis of hydrated calcium phosphates powder, through a simple reactive method, which will be the basis for the production of calcium phosphate biocimentos with self-setting reaction. Three calcium phosphates compositions were produced via CaCO3/phosphoric acid reactive method in the ratios Ca/P = 1,5; 1,6 e 1,67 molar. The presented results are associated to hydrated powder morphology and synthesis process control. Scanning Electron Microscopy (SEM) helped with the morphological characterization of the powders, the laser analysis method was used for determining particle size and the Fourier Transformed Infrared Spectroscopy (FTIR) gave support to the identification of H2O e PO43-grouping vibrational bands. The work showed that for the different powder compositions the hydrated calcium phosphate phase is formed by clustered fine particles. This demonstrated that the chosen synthesis method permits the obtention of hydrated calcium phosphates, precursors for later biocement production.

Surface characterization of Ca-P/Ag/TiO2 nanotube composite layers on Ti intended for biomedical applications

2012 ◽  
Vol 100A (8) ◽  
pp. 1954-1962 ◽  
Author(s):  
Agata Roguska ◽  
Marcin Pisarek ◽  
Mariusz Andrzejczuk ◽  
Malgorzata Lewandowska ◽  
Krzysztof J. Kurzydlowski ◽  
...  
Keyword(s):  
Biomedical Applications ◽  
Surface Characterization ◽  
Tio2 Nanotube ◽  
Composite Layers

Synthesis and Characterization of Calcium Phosphate from Fossilized Calcareous Shells for Biomedical Applications

2014 ◽  
Vol 798-799 ◽  
pp. 449-453
Author(s):  
Daiara F. Silva ◽  
Nelson Heriberto Almeida Camargo ◽  
Gisele M.L. Dalmônico ◽  
Pricyla Corrêa ◽  
Mônica S. Schneider ◽  
...  
Keyword(s):  
Calcium Phosphate ◽  
Bone Tissue ◽  
Biomedical Applications ◽  
Bone Structure ◽  
Raw Materials ◽  
New Class ◽  
Innovative Biomaterials ◽  
Near Future

Calcium phosphate nanostructured biomaterials are a new class of biomaterials, they are clinically promising for bone tissue reconstitution. That is because this new class of biomaterials provides new microstructural features, nanostructural, surface area and micropore grains of different conventional biomaterials capable of offering new expectations in the bone tissue reconstitution and formation process [1, 2, 3, 4, 5]. Studies performed in vivo by different authors indicate these bioceramics as innovative biomaterials and may, in the near future, present themselves as biomaterials which can replace conventional biomaterials autogenous, alogenous and exogenous treatments on bone structure of the human skeleton. The calcium phosphate compositions produced from natural raw materials also have being promising for biomedical applications for these new biomaterials that have physical morphology and biological characteristics very similar to the bone tissue [4, 5, 6].

Preparation and Characterization of Modified Biphasic Calcium Phosphate Ceramics

2012 ◽  
Vol 506 ◽  
pp. 74-77 ◽  
Author(s):  
Naruporn Monmaturapoj ◽  
Witoon Thepsuwan
Keyword(s):  
Thermal Stability ◽  
Calcium Phosphate ◽  
Flexural Strength ◽  
Mechanical Strength ◽  
Bone Substitute ◽  
Biomedical Applications ◽  
Biphasic Calcium Phosphate ◽  
Bending Strength ◽  
Thermal Stability Of

Biphasic calcium phosphate (BCP) ceramic is commonly used in the biomedical applications particularly as a bone substitute due to its biocompatibility and directly bond to bones. However, the mechanical strength is quite poor. Therefore, well known biocompatible and strong ceramics such as SiO2, ZrO2 and TiO2 were added to improve the strength of BCP. BCP powder with HA/TCP ratios of 70/30 (HAP7030) was obtained by controlling the calcining temperature of the mixture between a pure HA and TCP. SiO2, ZrO2 and TiO2 powder with 2, 5 and 10 %wt were mixed with the HAP7030 powder by ball milling in ethanol. The mixtures were dried, pressed and sintered at 1100°C for 2 hrs. XRD and SEM were used to determine crystal structures and morphology of the sintered samples, respectively. Physical properties and flexural strength of samples were measured. Results showed that the bending strength of HAP7030 sample was rather improved by adding TiO2 than the addition of SiO2 or ZrO2. With increasing TiO2, HAP7030 strength was superior and HAP7030 with 10 %wt of TiO2 obtained the optimum bending strength around 61 MPa. However, the addition of TiO2 induced the thermal stability of HA/TCP, in which HA completely decomposed to β-TCP in this study.

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