Sol–gel derived hydroxyapatite coatings on titanium and its alloy Ti6Al4V

Stoch, A.; ̧bski, W. Jastrze; Długoń, E.; Lejda, W.; Trybalska, B.; Stoch, G.; Adamczyk, Anna

doi:10.1016/j.molstruc.2004.10.080

Cited by 66 publications

(47 citation statements)

References 9 publications

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“…Current hard tissue engineering applications include bone repair, bone augmentation, coating of metal implants, and as filler material for both bone and teeth. [9][10][11] Unfortunately, due to its low mechanical strength, the use of pure HAP ceramics is restricted to low load bearing clinical applications. In some cases, combining HAP with other materials, such as polymers and/or glasses to form a composite, can alleviate these deficiencies.…”

Section: Introductionmentioning

confidence: 99%

Thermal and ultrasonic influence in the formation of nanometer scale hydroxyapatite bio-ceramic

Poinern¹,

Brundavanam²,

Le³

et al. 2011

IJN

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Hydroxyapatite (HAP) is a widely used biocompatible ceramic in many biomedical applications and devices. Currently nanometer-scale forms of HAP are being intensely investigated due to their close similarity to the inorganic mineral component of the natural bone matrix. In this study nano-HAP was prepared via a wet precipitation method using Ca(NO 3 ) 2 and KH 2 PO 4 as the main reactants and NH 4 OH as the precipitator under ultrasonic irradiation. The Ca/P ratio was set at 1.67 and the pH was maintained at 9 during the synthesis process. The influence of the thermal treatment was investigated by using two thermal treatment processes to produce ultrafine nano-HAP powders. In the first heat treatment, a conventional radiant tube furnace was used to produce nano-particles with an average size of approximately 30 nm in diameter, while the second thermal treatment used a microwave-based technique to produce particles with an average diameter of 36 nm. The crystalline structure and morphology of all nanoparticle powders produced were investigated using X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), and Fourier transform infrared spectroscopy (FT-IR). Both thermal techniques effectively produced ultrafine powders with similar crystalline structure, morphology and particle sizes.

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Section: Introductionmentioning

confidence: 99%

Thermal and ultrasonic influence in the formation of nanometer scale hydroxyapatite bio-ceramic

Poinern¹,

Brundavanam²,

Le³

et al. 2011

IJN

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show abstract

“…Hydroxyapatite (HA), Ca 10 (PO 4 ) 6 (OH) 2, a proven bioceramic for coating medical device implants is widely known, not only for its biocompatible and osteoconductive properties, but also for its increased mechanical properties when applied to bio-inert metals for orthopedic use [1][2][3][4]. Implant surface modifications are often required in order to prescribe a particular surface roughness and increase surface area for osteoblast attachment, as well as to enhance the bioactive and osteoconductive properties of the underlying substrate.…”

Section: Introductionmentioning

confidence: 99%

“…Implant surface modifications are often required in order to prescribe a particular surface roughness and increase surface area for osteoblast attachment, as well as to enhance the bioactive and osteoconductive properties of the underlying substrate. Such surface treatment methods include sand-or grit-blasting using abrasives, chemical treatments and deposition of calcium phosphate (CaP) coatings [2][3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

A Modified Surface on Titanium Deposited by a Blasting Process

et al. 2011

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Hydroxyapatite (HA) coating of hard tissue implants is widely employed for its biocompatible and osteoconductive properties as well as its improved mechanical properties. Plasma technology is the principal deposition process for coating HA on bioactive metals for this application. However, thermal decomposition of HA can occur during the plasma deposition process, resulting in coating variability in terms of purity, uniformity and crystallinity, which can lead to implant failure caused by aseptic loosening. In this study, CoBlast TM , a novel blasting process has been used to successfully modify a titanium (V) substrate with a HA treatment using a dopant/abrasive regime. The impact of a series of apatitic abrasives under the trade name MCD, was investigated to determine the effect of abrasive particle size on the surface properties of both microblast (abrasive only) and CoBlast (HA/abrasive) treatments. The resultant HA treated substrates were compared OPEN ACCESSCoatings 2011, 1 54 to substrates treated with abrasive only (microblasted) and an untreated Ti. The HA powder, apatitic abrasives and the treated substrates were characterized for chemical composition, coating coverage, crystallinity and topography including surface roughness. The results show that the surface roughness of the HA blasted modification was affected by the particle size of the apatitic abrasives used. The CoBlast process did not alter the chemistry of the crystalline HA during deposition. Cell proliferation on the HA surface was also assessed, which demonstrated enhanced osteo-viability compared to the microblast and blank Ti. This study demonstrates the ability of the CoBlast process to deposit HA coatings with a range of surface properties onto Ti substrates. The ability of the CoBlast technology to offer diversity in modifying surface topography offers exciting new prospects in tailoring the properties of medical devices for applications ranging from dental to orthopedic settings.

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“…Such capabilities have made HAP an ideal candidate for orthopaedic and dental implants or part thereof. Synthetic HAP has been used widely for the repair of hard tissues and its common uses are bone repair, bone augmentation as well as coating of implants or acting as fillers in bone or teeth [9][10][11]. However the low mechanical strength of normal HAP ceramics restricts its use mainly to conditions of low load bearing applications.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterisation of nanohydroxyapatite using an ultrasound assisted method

Poinern

Brundavanam

Mondinos

et al. 2009

Ultrasonics Sonochemistry

151

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Nanostructured hydroxyapatite (HAP) was prepared by a wet precipitation method using Ca(NO 3 ) and KH 2 PO 4 as the main material and NH 3 as the precipitator under ultrasonic irradiation. The Ca/P ratio was set at 1.67 and the pH maintained at a minimum of 9. The temperature conditions and ultrasound influences were investigated using X-ray diffraction (XRD), Field Emission Scanning Electron Microscopy (FESEM) and Fourier Transform Infrared Spectroscopy (FT-IR). The results showed that Nano-HAP can be obtained by this method and the particles were achieved to around 30nm.

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Sol–gel derived hydroxyapatite coatings on titanium and its alloy Ti6Al4V

Cited by 66 publications

References 9 publications

Thermal and ultrasonic influence in the formation of nanometer scale hydroxyapatite bio-ceramic

Thermal and ultrasonic influence in the formation of nanometer scale hydroxyapatite bio-ceramic

A Modified Surface on Titanium Deposited by a Blasting Process

Synthesis and characterisation of nanohydroxyapatite using an ultrasound assisted method

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