TITLE

Development of nano-hydroxyapatite coating by electrohydrodynamic atomization spraying

AUTHOR(S)
Xiang Li; Jie Huang; Edirisinghe, Mohan
PUB. DATE
April 2008
SOURCE
Journal of Materials Science: Materials in Medicine;Apr2008, Vol. 19 Issue 4, p1545
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Electrohydrodynamic atomisation (EHDA) spraying of a hydroxyapatite (HA) suspension consisting of nano-particles (nHA) has been used to produce a HA coating comprising of nanostructured surface topography. In EHDA the suspension is jetted from a needle under an electric field. Obtaining the stable cone-jet mode of EHDA is critical to improve the quality and optimise the morphology of HA coatings, therefore a systematic investigation of the effects of several key processing parameters, such as suspension flow rate, applied voltage and distance between the needle and substrate, and needle size was carried out in this work. The HA coatings processed under different spraying parameters were compared and then scored according to uniformity and microstructural integrity. It was found that all of these parameters had a very significant influence on the morphology of nHA coating prepared. Under an optimised processing condition, where a needle orifice diameter of 300 μm, kept at a distance of 20 mm from the substrate, a flow rate of 20 μL/min, and the applied voltage kept within 4.3 kV and 5.2 kV, a uniform nHA coating was obtained. This is a crucial step forward in obtaining advanced nano-hydroxyapatite coatings of high quality for biomedical applications by using EHDA spraying.
ACCESSION #
31244618

 

Related Articles

  • Preparation of an electrodeposited hydroxyapatite coating on titanium substrate suitable for in-vivo applications. Suping Huang; Kechao Zhou; Baiyun Huang; Zhiyou Li; Shaihong Zhu; Guohui Wang // Journal of Materials Science: Materials in Medicine;Jan2008, Vol. 19 Issue 1, p437 

    In this paper the porous hydroxyapatite coating on Ti implant materials was prepared by the process of electrodeposition, hydrothermal and sinter. The surface morphology, bond strength and thickness of HA coatings were investigated by SEM, AFM, and its biocompatibility was evaluated by...

  • PLD bioactive ceramic films: the influence of CaO–P2O5 glass additions to hydroxyapatite on the proliferation and morphology of osteblastic like-cells. Oliveira, Gisela; Ferraz, Maria P.; González, Pío G.; Serra, Julia; Leon, Betty; Pèrez-Amor, Mariano; Monteiro, Fernando J. // Journal of Materials Science: Materials in Medicine;Apr2008, Vol. 19 Issue 4, p1775 

    This work consists on the evaluation of the in vitro performance of Ti6Al4V samples PLD (pulsed laser deposition) coated with hydroxyapatite, both pure and mixed with a CaO–P2O5 glass. Previous studies on immersion of PLD coatings in SBF, showed that the immersion apatite films did not...

  • Biocompatibility evaluation of a novel hydroxyapatite-polymer coating for medical implants (in vitro tests). Negroiu, Gabriela; Piticescu, Roxana M.; Chitanu, Gabrielle C.; Mihailescu, Ion N.; Zdrentu, Livia; Miroiu, Marimona // Journal of Materials Science: Materials in Medicine;Apr2008, Vol. 19 Issue 4, p1537 

    Nanocomposites consisting of hydroxyapatite (HA) and a sodium maleate copolymer (maleic polyelectrolyte), synthesized by hydrothermal method and deposited on titanium substrates by Matrix Assisted Pulsed Laser Evaporation (MAPLE) technique were tested for the biological properties. Coating...

  • Hydration mechanism of a novel PCCP + DCPA cement system. Xiupeng Wang; Jiandong Ye; Yingjun Wang // Journal of Materials Science: Materials in Medicine;Feb2008, Vol. 19 Issue 2, p813 

    A novel partially crystallized calcium phosphate (PCCP) + dicalcium phosphate anhydrous (DCPA) system bone cement was introduced and the mechanism of the hydration was studied by means of solubility product constant ( K sp), XRD, pH value, and BET. Results showed that DCPA was more soluble than...

  • The Role of Titanium Implant Surface Modification with Hydroxyapatite Nanoparticles in Progressive Early Bone-Implant Fixation In Vivo. Audrey Lin; Chiachien Jake Wang; Kelly, James; Gubbi, Prabhu; Nishimura, Ichiro // International Journal of Oral & Maxillofacial Implants;2009, Vol. 24 Issue 5, p808 

    Purpose: This study evaluated the biologic effect in vivo of hydroxyapatite (HA) nanoparticle surface modification on commercially pure titanium or titanium alloy (Ti-6Al-4V) implants. Materials and Methods: Miniature cylindric titanium and Ti-6Al-4V implants were pretreated with dual acid...

  • Development of glass ceramic coatings containing hydroxyapatite. Kulinich, E.; Khabas, T.; Vereshchagin, V. // Glass & Ceramics;Mar2007, Vol. 64 Issue 3/4, p143 

    Glass ceramic composites — to be used for coatings on titanium implants — based on leucite glass with elevated flux content and added hydroxyapatite or a mixture of hydroxyapatite and fluorite are examined. It is established that pastes containing no more than 30% hydroxyapatite in...

  • Variability of Hydroxyapatite-Coated Dental Implants. Gross, Karlis A.; Berndt, Chris C.; Iacono, Vincent J. // International Journal of Oral & Maxillofacial Implants;Sep/Oct1998, Vol. 13 Issue 5, p601 

    Uniformity, surface roughness, and chemical phase structure are all important features of implant coatings. While the first two variables are important for implant placement, the phase structure affects implant fixation. This study examined the coating morphology and the amount, size, and...

  • Histologic Evaluation of a Retrieved Human HA-Coated Subperiosteal Implant: Report of a Case. Benjamin, Lewis S.; Block, Michael S. // International Journal of Oral & Maxillofacial Implants;Spring1989, Vol. 4 Issue 1, p25 

    A retrieval study of a hydroxyapatite-coated subperiosteal implant after 1 year of function, demonstrates a direct connection with the underlying bone.

  • Interface Mechanics and Histology of Titanium and Hydroxylapatite-Coated Titanium for Dental Implant Applications. Cook, Stephen D.; Kay, John F.; Thomas, Kevin A.; Jarcho, Michael // International Journal of Oral & Maxillofacial Implants;Winter1987, Vol. 2 Issue 1, p14 

    The interface mechanical characteristics and histology of CP titanium and hydroxylapatite (HA)-coated titanium were investigated. The HA-coated system developed five to eight times the mean interface strength of the uncoated, bead-blasted CP titanium system. Histologic evaluations in all cases...

Share

Read the Article

Courtesy of

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics