scholarly journals Characterisation of the surface structure and bioactivity of glass and glass ceramics using surface topography

2012 ◽  
Vol 10 (6) ◽  
pp. 1890-1898 ◽  
Author(s):  
Gabriela Lutišanová ◽  
Martin Palou ◽  
Milan Mikula ◽  
Jana Kozánková
Keyword(s):  
Surface Structure ◽  
Surface Topography ◽  
Body Fluid ◽  
Glass Ceramics ◽  
Apatite Layer ◽  
In Vitro Bioactivity ◽  
Ceramic Samples ◽  
Melting Technique ◽  
The Relationship

AbstractThe present paper reports the results of the relationship between the surface topography, microstructure and the in vitro bioactivity of samples with and without fluorapatite content in simulated body fluid. Glasses and glass ceramics belonging to the Li2O-SiO2-CaO-P2O5-CaF2 system were prepared by using conventional melting technique following by heat treatment to obtain glass ceramics. This current study demonstrates the benefits of combining two microscopic methods for better investigation of the surface structure. The formation of apatite layer on the surface and the increase in surface roughness proved that the glasses and glass ceramics with bioactive fluorapatite content could satisfy to the requirements for biomaterial applications. The results also showed that the roughness of apatite layer formed after immersion in body fluid on the surface of glasses with fluorapatite was more pronounced than that of equivalent glass ceramic samples cured under the same conditions.

IN-VITRO BIOACTIVITY EVALUATION OF K2O-SUBSTITUTED Na2O-CaO-P2O5-SiO2 GLASS BIOCERAMICS

2018 ◽  
Vol 25 (05) ◽  
pp. 1850104
Author(s):  
REHANA ZIA ◽  
MADEEHA RIAZ ◽  
AYESHA ASGHAR ◽  
TOUSIF HUSSAIN
Keyword(s):  
Body Fluid ◽  
Glass Ceramics ◽  
Proper Function ◽  
Processing Temperature ◽  
In Vitro Bioactivity ◽  
X Ray Diffraction ◽  
Solid State Method ◽  
X Ray ◽  
Ceramic Samples

In the present work, the effect of K2O/Na2O substitution on the bioactivity of Na2O-CaO-P2O5-SiO2 ceramics prepared by solid-state method was studied. Ceramics-based bioactive implants are economical; they require low processing temperature and are more bioactive when compared with glasses, glass ceramics and composites. K2O is known to control proper function of cells and stimulate bone formation process. The hydroxyapatite layer developed on the surface of samples after soaking in stimulated body fluid solution was studied by X-ray diffraction, scanning electron microscopy, Fourier transform infrared spectroscopy and atomic absorption spectroscopy. The results showed an increase in the bioactivity of the samples as Na2O was partially replaced with K2O. The addition of K2O enhanced the apatite-forming ability of the ceramic samples and makes it suitable for filling defects and fracture in bones.

Preparation and Characterization of Bioactive and Magnetic Biphasic Thermo-Seeds Material

2013 ◽  
Vol 834-836 ◽  
pp. 301-304
Author(s):  
Jian An Liu ◽  
Xue Na Yang ◽  
Mei Mei Zhang
Keyword(s):  
Magnetic Property ◽  
Phase Composition ◽  
Glass Ceramic ◽  
Body Fluid ◽  
Glass Ceramics ◽  
Magnetic Behavior ◽  
In Vitro Bioactivity ◽  
Magnetic Glass

A novel biphasic material has been synthesized from a melt-derived bioactive glass (45S5) and a glass-ceramic obtained from a melt-derived magnetic glass-ceramics for hyperthermia application. The biphasic material obtained from a mixture 1:1 of these components. The phase composition was investigated by XRD. The magnetic property was measured by VSM. The in vitro bioactivity was investigated by simulated body fluid (SBF) soaking experiment. The glass-ceramic shows magnetic behavior and bioactive, useful for hyperthermia.

Bioactivity of Silver Doped Hydroxyapatite Scaffolds in Simulated Body Fluids

2014 ◽  
Vol 604 ◽  
pp. 175-179 ◽  
Author(s):  
Lasma Poca ◽  
Arita Dubnika ◽  
Dagnija Loca ◽  
Liga Berzina-Cimdina
Keyword(s):  
Simulated Body Fluid ◽  
Incubation Period ◽  
Powder Diffraction ◽  
Body Fluid ◽  
Body Fluids ◽  
Apatite Layer ◽  
X Ray ◽  
Simulated Body Fluids ◽  
Two Phases

In the present study, thein vitrobioactivity of silver-doped hydroxyapatite (HAp/Ag) scaffolds was investigated. HAp/Ag was prepared using two different modified wet precipitation methods. The X-ray powder diffraction (XRD) results showed, that sintered HAp/Ag samples prepared using method (I) contain two phases HAp and Ag, but samples prepared by method (II) contain three different phases - HAp, Ag and AgO. After 2 month incubation period in simulated body fluid (SBF), surface of HAp/Ag scaffolds was coated with bone-like apatite. Thickness of bone-like apatite layer increased from 2 μm up to 32 μm, increasing the incubation period.

scholarly journals Effects of Mullite, Maghemite, and Silver Nanoparticles Incorporated in β-Wollastonite on Tensile Strength, Magnetism, Bioactivity, and Antimicrobial Activity

Materials ◽  
2021 ◽  
Vol 14 (16) ◽  
pp. 4643
Author(s):  
Hamisah Ismail ◽  
Farah ‘Atiqah Abdul Azam ◽  
Zalita Zainuddin ◽  
Hamidun Bunawan ◽  
Muhamad Afiq Akbar ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Tensile Strength ◽  
Body Fluid ◽  
Rice Husk Ash ◽  
Antibacterial Properties ◽  
Bone Defects ◽  
Antibacterial Efficacy ◽  
In Vitro Bioactivity ◽  
Defect Recovery

β-wollastonite (βW) has sparked much interest in bone defect recovery and regeneration. Biomaterial-associated infections and reactions between implants with human cells have become a standard clinical concern. In this study, a green synthesized βW, synthesized from rice husk ash and a calcined limestone precursor, was incorporated with mullite, maghemite, and silver to produce β wollastonite composite (βWMAF) to enhance the tensile strength and antibacterial properties. The addition of mullite to the βWMAF increased the tensile strength compared to βW. In vitro bioactivity, antibacterial efficacy, and physicochemical properties of the β-wollastonite and βWMAF were characterized. βW and βWMAF samples formed apatite spherules when immersed in simulated body fluid (SBF) for 1 day. In conclusion, βWMAF, according to the tensile strength, bioactivity, and antibacterial activity, was observed in this research and appropriate for the reconstruction of cancellous bone defects.

scholarly journals The effect of calcinated hydroxyapatite and magnesium doped hydroxyapatite as fillers on the mechanical properties of a model BisGMA/TEGDMA dental composite initially and after aging

10.30544/403 ◽  
2018 ◽  
Vol 24 (4) ◽  
Author(s):  
Tamara Matic ◽  
Maja Ležaja Zebić ◽  
Ivana Cvijović-Alagić ◽  
Vesna Miletić ◽  
Rada Petrović ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Body Fluid ◽  
Control Sample ◽  
Dental Composite ◽  
In Vitro Bioactivity ◽  
Significant Difference ◽  
Nanosized Hydroxyapatite ◽  
Glass Fillers ◽  
Mg Doped

The aim of this study was to investigate the possibility of modifying model BisGMA/TEGDMA dental composite by substituting 10 wt. % of conventional glass fillers with bioactive fillers based on calcinated nanosized hydroxyapatite (HAp) and Mg doped hydroxyapatite (Mg-HAp). HAp and Mg-HAp powders were synthesized hydrothermally. Mechanical properties: hardness by Vickers (HV) and flexural strength (Fs) were tested initially and after being stored for 28 days in simulated body fluid (SBF). The experimental composites with HAp and Mg-HAp particles showed no statistically significant difference in HV compared to the control (p>0.05) either initially or after storage. Although mean Fs values of modified composites tested initially were lower (62 MPa) than those of the control (72 MPa), after 28 days of storage in SBF Fs values were greater for modified composites (42 MPa control sample, 48 MPa HAp and Mg-HAp samples). In vitro bioactivity of BisGMA/TEGDMA composites with HAp and Mg-HAp particles after 28 days in SBF was not detected. Keywords: hydroxyapatite; magnesium; dental composite; mechanical properties;

Synthesis of sol-gel derived glass powder and in vitro bioactivity property tested in simulated body fluid

2016 ◽  
Author(s):  
S. A. Syed Nuzul Fadzli ◽  
S. Roslinda ◽  
Firuz Zainuddin ◽  
Hamisah Ismail
Keyword(s):  
Simulated Body Fluid ◽  
Body Fluid ◽  
Glass Powder ◽  
Sol Gel ◽  
In Vitro Bioactivity

In Vitro Bioactivity Characterization of Machinable Glass Ceramics Containing 85wt% Na-mica and 15wt% Fluorapatite

2006 ◽  
pp. 325-328
Author(s):  
Gultekin Göller ◽  
Ipek Akin ◽  
A. Kahraman ◽  
Erdem Demirkesen ◽  
M. Urgen
Keyword(s):  
Glass Ceramics ◽  
In Vitro Bioactivity

Bioactive Composite Materials for Bone Tissue Applications

2006 ◽  
Vol 514-516 ◽  
pp. 985-989
Author(s):  
B.J.M. Leite Ferreira ◽  
M.G.G.M. Duarte ◽  
M. Helena Gil ◽  
Rui N. Correia ◽  
J. Román ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Bone Tissue ◽  
Tissue Repair ◽  
Body Fluid ◽  
In Vitro Bioactivity ◽  
X Ray Diffraction ◽  
X Ray ◽  
Biodegradable Composite ◽  
Scanning Electron

Two materials with potential application in bone tissue repair have been developed: 1) a non-biodegradable composite based in a new methacrylic-co-acrylic matrix; and 2) a biodegradable composite based in a chitosan (Ch) matrix. Both matrices were reinforced with glass-ceramic particles of composition (mol%) 70 SiO2 – 30 CaO. The in vitro bioactivity of composites was assessed by soaking in simulated body fluid (SBF) for periods of up to 7 days at 37º C. X-ray diffraction (XRD) and scanning electron microscopy coupled with X-ray energy dispersive spectroscopy (SEM-EDS) were used for deposit identification after different soaking periods. Calcium phosphate particulate deposits were detected after 3 days of immersion, followed by growth and maturation towards apatite.

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