Surface functionalized barium sulfate nanoparticles: controlled in situ synthesis and application in bone cement

2014 ◽  
Vol 2 (9) ◽  
pp. 1264-1274 ◽  
Author(s):  
Chao Fang ◽  
Ruixia Hou ◽  
Kefeng Zhou ◽  
Feibin Hua ◽  
Yang Cong ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Bone Cement ◽  
Barium Sulfate ◽  
In Situ Synthesis ◽  
Bone Cements

Controlled in situ synthesis of MSAH-coated BaSO4 nanoparticles improves the mechanical properties and in vitro biocompatibility of the bone cements.

Influence of Antibiotics Addition in Bone Cements for Hip Arthroplasty on their Mechanical Properties: Clinical Perspective and In Vitro Tests

2016 ◽  
Vol 695 ◽  
pp. 123-127
Author(s):  
Razvan Ene ◽  
Zsombor Panti ◽  
Mihai Nica ◽  
Marian Pleniceanu ◽  
Patricia Ene ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Bone Cement ◽  
Hip Arthroplasty ◽  
Revision Surgery ◽  
Bone Cements ◽  
Artificial Joints ◽  
The One ◽  
Prophylactic Method ◽  
Active Substances

Bone cement has been used for over half a century, to successfully anchor artificial joints. From its emergence there have appeared a number of types of bone cement, with the 2 major classes being bone cement with or without active substances. The one with the added antibiotics is used primarily in the treatment and revision surgery of infected total hip arthroplasty (THA), as well as a prophylactic method in primary THA in patients with high risks for this complication. The purpose of this study is to determine the mechanical properties of bone cement with added antibiotics. Over a period of 2 years, a number of 41 cases were chosen for this study: 25 with revision surgery for THA, where bone cement with antibiotics was used, and 16 with primary THA, where regular bone cement was used. A number of studies have been performed on the mechanical properties of the 2 types of cement, which determined that the cement with antibiotics presents a slightly lower compressive strength, tensile strength, elastic modulus and fatigue strength compared with regular cement. These variations, however, become more pronounced as the quantity of the antibiotic goes up. The mechanical properties of the cement with antibiotics are similar with those of the regular cement, when low doses of antibiotics are used and become more evident as the doses go up. In conclusion, the antibiotic bone cement is a trustworthy tool in the surgeon’s arsenal against infection, with minimal detriments from the mechanical view.

Preliminary In Vitro Biocompatibility of Injectable Calcium Ceramic-Polymer Composite Bone Cement

2008 ◽  
Vol 396-398 ◽  
pp. 273-276 ◽  
Author(s):  
Mervi Puska ◽  
Joni Korventausta ◽  
Sufyan Garoushi ◽  
Jukka Seppälä ◽  
Pekka K. Vallittu ◽  
...  
Keyword(s):  
Bone Cement ◽  
Bone Substitutes ◽  
Bone Cements ◽  
Bioactive Glasses ◽  
Biomechanical Loading ◽  
Outermost Surface ◽  
Bone Substitute Materials ◽  
Substitute Materials

In the coming decades, the need for reconstructive surgery of bones is predicted to increase with the ageing of the population as well as the increase of injuries needing traumatologic treatments. Therefore, there is still a constant search for tissue engineering and bone substitute materials. Xenografts, synthetic hydroxyapatitite, bioactive glasses and other bone substitutes have widely been studied. When bone defects are filled using bioceramics in granules, their utilization is limited to small size defects, because the injected granules do not give immediate support against the biomechanical loading of the bone. The aim of this study was to evaluate the preliminary biomineralization and the compression strength of experimental injectable bone cements modified with calcium ceramics. Our studies have focused on the development of injectable composites of bone cements, i.e. in situ curable resin systems containing impregnated Ca ceramics. The polymerized bone cement composites aspire to simulate as closely as possible the mechanical and structural properties properties of bone. The present compressive strength of our inorganic-organic bone cements are >65 up to ~180 MPa. These cements are slightly porous from their outermost surface and showed preliminarily osteoconductivity of some degree.

scholarly journals Mechanical Properties of In-Situ Synthesis of Ti-Ti3Al Metal Composite Prepared by Selective Laser Melting

Metals ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 1121 ◽  
Author(s):  
Li ◽  
Liang ◽  
Tian ◽  
Yang ◽  
Xie ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Wear Resistance ◽  
Selective Laser Melting ◽  
Melting Process ◽  
In Situ Synthesis ◽  
Metal Composite ◽  
Dispersion Strengthening ◽  
Laser Melting ◽  
Compression Properties

Titanium composite strengthened by Ti3Al precipitations is considered to be one of the excellent materials that is widely used in engineering. In this work, we prepared a kind of Ti-Ti3Al metallic composite by in-situ synthesis technology during the SLM (selective laser melting) process, and analyzed its microstructure, wear resistance, microhardness, and compression properties. The results showed that the Ti-Ti3Al composite, prepared by in-situ synthesis technology based on SLM, had more homogeneous Ti3Al-enhanced phase dispersion strengthening structure. The grain size of the workpiece was about 1 μm, and that of the Ti3Al particle was about 200 nm. Granular Ti3Al was precipitated after the aluminum-containing workpiece formed, with a relatively uniform distribution. Regarding the mechanical properties, the hardness (539 HV) and the wear resistance were significantly improved when compared with the Cp-Ti workpiece. The compressive strength of the workpiece increased from 886.32 MPa to 1568 MPa, and the tensile strength of the workpiece increased from 531 MPa to 567 MPa after adding aluminum. In the future, the combination of in-situ synthesis technology and SLM technology can be used to flexibly adjust the properties of Ti-based materials.

In situ synthesis of ternary BaTiO3/MWNT/PBO electromagnetic microwave absorption composites with excellent mechanical properties and thermostabilities

2015 ◽  
Vol 3 (15) ◽  
pp. 8205-8214 ◽  
Author(s):  
Jia Wei ◽  
Shuo Zhang ◽  
Xiaoyun Liu ◽  
Jun Qian ◽  
Jiasong Hua ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Microwave Absorption ◽  
In Situ Synthesis ◽  
Absorption Properties ◽  
Microwave Absorption Properties

BaTiO3/MWNT/PBO ternary composites with excellent microwave absorption properties, mechanical properties and thermostabilities.

Effect of Dehydration Methods on Mechanical Strength of Nanohydroxyapatite/Collagen Composites

2007 ◽  
Vol 330-332 ◽  
pp. 349-352
Author(s):  
Xiao Yan Lin ◽  
Xu Dong Li ◽  
Xing Dong Zhang
Keyword(s):  
Mechanical Properties ◽  
Binding Energy ◽  
Freeze Drying ◽  
Bending Strength ◽  
Bond Formation ◽  
In Situ Synthesis ◽  
Drying Methods ◽  
Key Factors ◽  
Air Drying

Hydroxyapatite/collagen composites were prepared in-situ synthesis. The composites were finally achieved by dehydration including air-drying and freeze-drying methods. FTIR, XPS and DSC were employed to investigate the composites dehydrated by two methods. The air-dried composites had better mechanical properties than those of the composites dried by freeze drying. Air-drying of the composite induced more bond formation and crosslink between collagen fibers and HA crystals compared with freeze-drying of the composite, as indicated by the shifting of amide A and I bands to the lower wavenumber and by the changes in the binding energy of O1s, Ca2p, and P2p, leading to the increase of the peak temperature of the composites. Collagen crosslink and bond formation in the air-dried composites were key factors to increase the bending strength of the composites. The results of this study confirm that in situ synthesis and air-dry method are effective ways to obtain nanoHA/COL composites with high mechanical properties.

scholarly journals Smart Injectable Self-Setting Monetite Based Bioceramics for Orthopedic Applications

Materials ◽  
2018 ◽  
Vol 11 (7) ◽  
pp. 1258 ◽  
Author(s):  
Naresh Koju ◽  
Prabaha Sikder ◽  
Bipin Gaihre ◽  
Sarit B. Bhaduri
Keyword(s):  
Bone Cement ◽  
Vital Role ◽  
Fracture Site ◽  
Bone Cements ◽  
Defect Site ◽  
Calcium Phosphate Bone Cement ◽  
Fusion Applications ◽  
Bone Integration ◽  
Orthopedic Applications

The present study is the first of its kind dealing with the development of a specific bioceramic which qualifies as a potential material in hard-tissue replacements. Specifically, we report the synthesis and evaluation of smart injectable calcium phosphate bone cement (CPC) which we believe will be suitable for various kinds of orthopedic and spinal-fusion applications. The smart nature of this next generation orthopedic implant is attained by incorporating piezoelectric barium titanate (BT) particles into monetite-based (dicalcium phosphate anhydrous, DCPA) CPC composition. The main goal is to take advantage of the piezoelectric properties of BT, as electromechanical effect plays a vital role in fracture healing at the defect site and bone integration with the implant. Furthermore, radiopacity of BT would help in easy detection of the CPC presence at the fracture site during surgery. Results reveal that BT addition favors important properties of bone cement such as good compressive strength, injectability, bioactivity, biocompatibility, and even washout resistance. Most importantly, the self-setting nature of the bone cements are not compromised with BT incorporation. The in vitro results confirm that the developed bone-cement abides by the standard orthopedic requirements making it apt for real-time prosthetic materials.

PEG-Iron Oxide Core-Shell Nanoparticles: In situ Synthesis and In vitro Biocompatibility Evaluation for Potential T2-MRI Applications

2020 ◽  
Vol 10 (4) ◽  
pp. 1107-1120
Author(s):  
Karina Almeida Barcelos ◽  
Marli Luiza Tebaldi ◽  
Eryvaldo Socrates Tabosa do Egito ◽  
Nádia Miriceia Leão ◽  
Daniel Cristian Ferreira Soares
Keyword(s):  
Iron Oxide ◽  
In Situ Synthesis ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
In Vitro Biocompatibility ◽  
Iron Oxide Core ◽  
Core Shell Nanoparticles ◽  
T2 Mri
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