Effects of applied voltages on hydroxyapatite coating of titanium by electrophoretic deposition

Meng, Xianwei; Kwon, Tae‐Yub; Yang, Yunzhi; Ong, Joo L.; Kim, Kyo Han

doi:10.1002/jbm.b.30497

Cited by 70 publications

(41 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Increasing the electric field resulted in increased rate of deposition, but the deposited particles had shorter time to rearrange and therefore these coatings had a more porous microstructure 30) . Previously, we reported that HA coatings prepared at dynamic voltages consisted of particles with continuous gradient, and that the morphology was distinctly different from that prepared at a constant voltage 19) . However, the dynamic process and deposition mechanism were not discussed clearly.…”

Section: Introductionmentioning

confidence: 88%

“…While bone compatibility is provided by the HA coating, the underlying metal possesses good ductility and strength. Deposition of HA coatings has been achieved by a number of methods, including plasma spraying [5][6][7] , ion implantation 8,9) , sputtering [10][11][12] , sol-gel coating [13][14][15] , biomimetic methods [16][17][18] , and electrophoretic deposition (EPD) [19][20][21] . Among these methods, EPD is a fairly rapid and inexpensive way of producing a dense and uniform coating on substrates even with complex geometries.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Hydroxyapatite coating by electrophoretic deposition at dynamic voltage

2008

Self Cite

View full text Add to dashboard Cite

The aim of this study was to evaluate hydroxyapatite (HA) coatings produced by dynamic voltage during electrophoretic deposition (EPD). Dynamic voltages from 0 to 200 V were incrementally applied in three interims. The as-deposited coating was sintered at 800°C and its properties evaluated. Structure and phase analyses of both as-deposited and sintered coatings were evaluated by scanning electron microscopy (SEM) and X-ray diffraction (XRD). The HA coatings obtained by dynamic voltage consisted of two layers. While the inner layer was dense and firmly attached to the substrate and contained fine HA particles, the outer layer was porous and contained bigger particles. Repeated deposition was applied to increase the thickness of the coatings. SEM analysis showed that these coatings were free of cracks. In addition, decomposition of HA coatings was not observed until 800°C.

show abstract

Section: Introductionmentioning

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Hydroxyapatite coating by electrophoretic deposition at dynamic voltage

2008

Self Cite

View full text Add to dashboard Cite

show abstract

“…The films were investigated for the development of hip prosthesis. Polyvinyl alcohol and N, N-dimethylformamide have also been added to HA suspensions to improve the adherence and strength of the coatings and to avoid cracking of the deposits upon drying (Meng et al 2006). However, it should be noted that the selection of dispersants, binders and other additives for biomedical applications is limited because some additives are toxic or may have adverse effects in contact with living tissue.…”

Section: Epd Of Hamentioning

confidence: 99%

Electrophoretic deposition of biomaterials

Boccaccını

Keim

et al. 2010

J. R. Soc. Interface.

613

412

View full text Add to dashboard Cite

Electrophoretic deposition (EPD) is attracting increasing attention as an effective technique for the processing of biomaterials, specifically bioactive coatings and biomedical nanostructures. The well-known advantages of EPD for the production of a wide range of microstructures and nanostructures as well as unique and complex material combinations are being exploited, starting from well-dispersed suspensions of biomaterials in particulate form (microsized and nanoscale particles, nanotubes, nanoplatelets). EPD of biological entities such as enzymes, bacteria and cells is also being investigated. The review presents a comprehensive summary and discussion of relevant recent work on EPD describing the specific application of the technique in the processing of several biomaterials, focusing on (i) conventional bioactive (inorganic) coatings, e.g. hydroxyapatite or bioactive glass coatings on orthopaedic implants, and (ii) biomedical nanostructures, including biopolymer-ceramic nanocomposites, carbon nanotube coatings, tissue engineering scaffolds, deposition of proteins and other biological entities for sensors and advanced functional coatings. It is the intention to inform the reader on how EPD has become an important tool in advanced biomaterials processing, as a convenient alternative to conventional methods, and to present the potential of the technique to manipulate and control the deposition of a range of nanomaterials of interest in the biomedical and biotechnology fields.

show abstract

“…Methods for manufacturing bioactive material coatings with chemical modifications include plasma spraying 27) , electrophoretic deposition 28) , and sputtering technique 29) . The plasma spray technique has been used to rapidly solidify aluminum oxide coatings on metal substrates 30) .…”

Section: Discussionmentioning

confidence: 99%

Enhanced biological responses of a hydroxyapatite/TiO<Sub>2</Sub> hybrid structure when surface electric charge is controlled using radiofrequency sputtering

et al. 2012

View full text Add to dashboard Cite

We investigated whether surface roughness and control of surface electric charge of a hydroxyapatite (HA)/titanium oxide (TiO2) hybrid coating could enhance biological responses associated with bone formation. After acid etching, a titanium surface was modified with HA and TiO2 by the dual sputtering deposition technique using radiofrequency sputtering. These surfaces were analyzed for surface roughness and surface electric charge intensity. Rat bone marrow-derived osteoblast-like cells were cultured on HA/TiO2 hybrid surfaces with different electric charges. The attachment and spreading behavior of these cells were significantly increased on the hybrid surface (p<0.05). In vivo experiment, the strength of bone-titanium implant integration with a hybrid surface was 3 times that of a control (p<0.05). The dual sputtering deposition technique created a HA/TiO2 hybrid structure. Our results show that the surface electric charge on a titanium surface is an important factor for enhancing biological responses.

show abstract

Effects of applied voltages on hydroxyapatite coating of titanium by electrophoretic deposition

Cited by 70 publications

References 49 publications

Hydroxyapatite coating by electrophoretic deposition at dynamic voltage

Hydroxyapatite coating by electrophoretic deposition at dynamic voltage

Electrophoretic deposition of biomaterials

Enhanced biological responses of a hydroxyapatite/TiO<Sub>2</Sub> hybrid structure when surface electric charge is controlled using radiofrequency sputtering

Contact Info

Product

Resources

About