image

CONSTED is a leading and pioneering enterprise with the most advanced international level in R&D, manufacturing and selling of large-scale crushing & screening plants , industrial milling equipments and beneficiation plants.

contact info

social networks

Dissolution behaviour of plasma sprayed apatite coatings ...

25-08-2005· A nanocrystallite apatite layer was shown to precipitate on the coatings in all media although this was significantly enhanced in simulated body fluid. The features of this layer (e.g., lattice parameters, crystallite size etc.) were quantified by adopting a novel approach to …

Hydroxyapatite (HA) Coatings - Lincotek Medical

Our original Osprovit ® coating is made using our established air plasma spray production process and offers the necessary adhesion strength (>15 MPa) for application on implants when applied at the recommended thickness of 30–150 microns. It is typically applied in a single layer but high-quality double coatings made with titanium as bottom layer and HA as a top Layer are also available.

Mechanism and kinetics of apatite formation on ...

Apatite (Ca5(PO4)3OH) has long been considered as an excellent biomaterial to promote bone repairs and implant. Apatite formation induced by negatively charged nanocrystalline TiO2 coatings soaked ...

Transfer of apatite coating from porogens to scaffolds ...

Transfer of apatite coating from porogens to scaffolds: uniform apatite coating within porous poly(DL-lactic-co-glycolic acid) scaffold in vitro. Li J(1), Beaussart A, Chen Y, Mak AF. Author information: (1)Department of Health Technology and Informatics, The Hong Kong Polytechnic University, Hong Hum, Kowloon, Hong Kong, China.

Biomimetic processing of nanocrystallite bioactive apatite ...

15-04-2003· Biomimetic processes have attracted huge attention in recent years due to their significant applications in biomedical areas such as bone tissue engineering. In the present study, a biomimetic process was employed to form a nanocrystallite apatite coating on metal. A thin bone-like apatite layer was coated onto titanium (Ti) metals via an ...

Biomimetic processing of nanocrystallite bioactive apatite ...

In this paper nanocrystallite apatite coating on TiZr substrate was prepared by a biomimetic process. Surface morphology, thickness, crystalline phases a~nd bond strength of the coating were investigated by SEM, XRD and tensIle test, respectively. Results show that the apatite coating exhibIts a nanocrystalIite structure with similar stoichiometry to that of natural bone.

Biomimetic nanocrystalline apatite coatings synthesized by ...

tWe report the deposition by Matrix Assisted Pulsed Laser Evaporation (MAPLE) technique of biomimeticnanocrystalline apatite coatings on titanium substrates, with potential application in tissue engineering.The targets were prepared from metastable, nanometric, poorly crystalline apatite powders, analogousto mineral bone, synthesized through a biomimetic approach by double decomposition …

Apatite Coating of Iron Oxide Nanoparticles by Alternate ...

10-07-2019· Apatite is a biocompatible material widely used to encapsulate iron-oxide nanoparticles (IONPs) for biomedical applications, such as drug-delivery or fluorescent probe agent. Apatite-coated IONPs are commonly fabricated by initially incubating carboxylate-functionalized IONPs in calcium solution and directly adding phosphate solution to initiate apatite precipitation (direct-addition method ...

Nanocrystallite apatite formation and its growth kinetics ...

TiO2/apatite coating on metal implants is an effective method to enhance the biological properties of the metal surface. In this study, porous NiTi with a banded structure of channels and an average porosity of 45?vol% was prepared by self-propagating high-temperature synthesis. Samples were subjected to chemical treatment in H2O2/HCl to form a layer of nanocrystallite TiO2 coating.

NCA - Nanocrystalline Apatites

What is the abbreviation for Nanocrystalline Apatites? What does NCA stand for? NCA abbreviation stands for Nanocrystalline Apatites.

Nanocrystalline bioactive apatite coatings | Semantic Scholar

Abstract A study of carbonatehydroxyapatite coatings deposited by a sol–gel technique from different precursor-sols containing different water/ethanol content is performed. All the sols form uniform and homogeneous coatings with good adhesive strength values. The composition of sols determine both the aging time necessary to deposit monophasic apatite coatings as well as the time interval to ...

Nanocrystalline hydroxyapatite coatings on titanium: a new ...

01-07-2005· Apatite coating on various substrates in simulated body fluids. Bioceramics, 2 (1989), pp. 235-242. View Record in Scopus Google Scholar. A.C. …

(PDF) Promoting bone-like apatite formation on titanium ...

16-04-2015· The negatively-charged surface, combined with unique surface structure of the Ta-N nanoceramic coatings, is believed to be responsible for the formation of homogenous, compact bone-like apatite …

Nanocrystalline bioactive apatite coatings - [PDF Document]

12-09-2016· After the immersion into an acellular simulated body fluidsolution, the coatings appeared to be constituted by two types of particles: nanoparticles smaller than 25 nm with a Ca/P molar ratio of 1.7,corresponding to the apatite solgel coating, and an other type of apatite particles with needle shape and Ca/P molar ratio of 1.4, correspondingto the mineralization process of the coatings.

The formation of nanocrystallite bone-like apatite on ...

Analysis of the coatings showed that a net-like Na2TiO3 layer with about 100 nm in size was formed on Ti-24Nd-4Zr-7.9Sn treated by NaOH. Consequently, a carbonated apatite nanocrystal coating, namely bone-like apatite, was biomimetically deposited on Na2TiO3 layer, which has similar mineral composition to that of natural bone.

Biomimetic processing of nanocrystallite bioactive apatite ...

In the present study, a biomimetic process was employed to form a nanocrystallite apatite coating on metal. A thin bone-like apatite layer was coated onto titanium (Ti) metals via an alkali pre-treatment. This was followed by immersion in a simulated body fluid.

Nanocrystalline bioactive apatite coatings - ScienceDirect

01-06-2006· Apatite calcium phosphate coatings have been deposited, by dip coating method, onto disc substrates of Ti6Al4V. Before coating deposition, substrates were polished with SiC of grit 320 and 9-3-1 μm diamond paste, and washed for 5 min in an ultrasound bath …

(PDF) Nanocrystalline bioactive apatite coatings | María ...

Nanocrystalline bioactive apatite coatings. Solid State Sciences, 2006. María Vallet-reg ...

The Formation of Nanocrystallite Bone-Like Apatite on ...

Ti-24Nd-4Zr-7.9Sn alloy with low elastic modulus and high strength is a great candidate for artificial biomaterials used in orthopedic and dental implants. In order to improve biocompatibility, a biomimetic process was employed to deposit a bone-like apatite nanocrystal coating on alloy. Analysis of the coatings showed that a net-like Na(2)TiO(3) layer with about 100 nm in size was formed on ...

Osteopontin regulates biomimetic calcium phosphate ...

In this work, the regulatory effect of recombinant osteopontin on biomimetic apatite is shown to produce platelet-shaped apatite crystallites with disordered layers coating them. The protein is also shown to regulate the content and properties of the disordered mineral phase (and sublayers within it).

Sol-Gel Derived Nanocrystalline Fluoridated Hydroxyapatite ...

03-12-2010· Nanocrystalline fluoridated hydroxyapatite (FHA) powders and coatings with a chemical composition of Ca10(PO4)6OH2–x F x (where x values were selected equal to 0.0,0.5, 1.0, 1.5, and 2.0) were prepared through a modified simple sol-gel technique in comparison with conventional alkoxide-based sol-gel route. X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning …

apatite coating nanocrystallite in greece

apatite coating nanocrystallite in greece. We are here for your questions anytime 24/7, welcome your consultation. Get Price. Apatite nodules Ap in a sample from dungrich anthropic sediments in the Makri Neolithic settlement Greece PPL In limestone and along the sides of coarse calcareous fragments apatite is often found as yellowish ...

Nanocrystalline Apatites: A Versatile Functionalizable ...

This contribution gathers various examples illustrating the fact that nanocrystalline apatites represent a genuine multi-functionalizable platform for a wide range of biomedical applications. It is indeed possible to convey additional functionalities to the already appealing properties of biomimetic apatites, via appropriate ionic substitutions and/or through controlled molecular adsorptions.

Nanocrystalline bioactive apatite coatings - NASA/ADS

A study of carbonatehydroxyapatite coatings deposited by a sol-gel technique from different precursor-sols containing different water/ethanol content is performed. All the sols form uniform and homogeneous coatings with good adhesive strength values. The composition of sols determine both the aging time necessary to deposit monophasic apatite coatings as well as the time interval to deposit ...

PROTEINS THAN PLASMA-SPRAYED HYDROXYAPATITE COATING

BIOMIMETIC NANOCRYSTALLINE APATITE COATING ABSORBS MUCH MORE BOVINE SERUM PROTEINS THAN PLASMA-SPRAYED HYDROXYAPATITE COATING +*Wen, HB; *Hippensteel, E; *Li, P +*DePuy, a Johnson & Johnson Company, 700 Orthopaedic Dr., Warsaw, IN 46581 Introduction: Orthopedic implants coated with a thin layer of bioactive calcium phosphate ceramics, particularly …

Investigation of HA Nanocrystallite Size Crystallographic ...

Estimation of HA nanocrystallite size lattice parameters is one of the most important factors for dissolution properties of bone apatites. In present work, the composition of apatite induce complex structures at the unit-cell level and play a role in influencing the dissolution rate of apatites, which may favour osteointegration.

Biomimetic processing of nanocrystallite bioactive apatite ...

15-04-2003· Biomimetic processing of nanocrystallite bioactive apatite coating on titanium J Ma 1,3, Huifen Wong 1, L B Kong 1,4 and K W Peng 2 Published 15 April 2003 • Nanotechnology, …

Biomimetic nanocrystalline apatite coatings synthesized by ...

01-02-2014· This manuscript it is dedicated to the deposition by MAPLE technique of biomimetic nanocrystalline apatite coatings on titanium substrates, with potential applications in medicine. The key part of the reported evidence is the investigation of the labile non-apatitic environments of mineral ions associated with the high surface reactivity of biomimetic apatites which was studied in our previous ...

Osteoclast and osteoblast responsive carbonate apatite ...

Osteoclast and osteoblast responsive carbonate apatite coatings for biodegradable magnesium alloys Sachiko Hiromoto a, Sayaka Itoha,b, Naomi Noda, Tomohiko Yamazakic, Hideki Katayamaa and Takaya Akashib aResearch Center for Structural Materials, National Institute for Materials Science, Tsukuba, Japan; bGraduate School of Science and Engineering, Hosei University, Tokyo, Japan;

Coatings | Free Full-Text | Development of Apatite Nuclei ...

We aimed to impart apatite-forming ability to carbon nanotube (CNT)-polyether ether ketone (PEEK) composite (CNT-PEEK). Since CNT possesses electrical conductivity, CNT-PEEK can be expected to useful not only for implant materials but also biosensing devices. First of all, in this study, CNT-PEEK was treated with sulfuric acid to form fine pores on its surface.