SEM and EDX studies of bioactive hydroxyapatite coatings on titanium implants

Ciobanu, Gabriela; Cârjă, Gabriela; Ciobanu, Octavian; Sandu, Ion; Sandu, Andrei Victor

doi:10.1016/j.micron.2007.11.011

Cited by 32 publications

(19 citation statements)

References 7 publications

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“…Recently, supersaturated calcium solutions (SCS) containing inorganic ions in higher concentrations than their counterparts present in SBF, have become the most used solutions in bioceramics applications due to the shorter process time. 13,14 This study focuses on the characteristics of the HAn powders synthesized by two different routes: the traditional wet chemical precipitation and the novel biomimetic precipitation using SCS solutions.…”

Section: Introductionmentioning

confidence: 99%

A comparative study of hydroxyapatite nanoparticles synthesized by different routes

Paz¹,

Guadarrama²,

López³

et al. 2012

Quím. Nova

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In this study, bioactive hydroxyapatite nanoparticles were prepared by two different methods: wet chemical precipitation and biomimetic precipitation. The aim was to evaluate the morphology, particle-size, crystallinity and phases of the powders obtained by traditional wet chemical precipitation and the novel biomimetic precipitation using a supersaturated calcium solution. The nanoparticles were investigated by transmission electron microscopy, Fourier transform infrared spectroscopy and X-ray diffraction. The results revealed that the nanoparticles were formed by hydroxyapatite with a high crystallinity and controlled morphology. Additionally, it was found that the shape and size of the nanoparticles can be modified with each preparation method.

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Section: Introductionmentioning

confidence: 99%

A comparative study of hydroxyapatite nanoparticles synthesized by different routes

Paz¹,

Guadarrama²,

López³

et al. 2012

Quím. Nova

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“…On the other hand, Ciobanu et al [22] and Qu & Wei [15] shared similar findings of uniform petal rose-like morphology on Ti surface. Both claimed that petal rose-like structure was HA layer that exhibited on the treated after soaking in modified supersaturated calcification solution (M-SCS) and SBF at medium pH, respectively.…”

Section: Surface Morphologymentioning

confidence: 60%

“…Both claimed that petal rose-like structure was HA layer that exhibited on the treated after soaking in modified supersaturated calcification solution (M-SCS) and SBF at medium pH, respectively. Petal rose-like structure of HA coating layer on Ti surface is believe could enhance the osteoinductive and biochemical properties of coating by modification of physical structure [22].…”

Section: Surface Morphologymentioning

confidence: 98%

Surface Characterization on Alkali-Heat-Treatment on Titanium Alloy

Hamzah¹

2016

MJAS

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Coating of apatite in a biomimetic fluid is an alternative technique for metallic coating. Key element for effective biomimetic apatite coating depends on the surface material that can be enhanced by physical and chemical pre-treatment process. Two different preparations of Titanium alloy (Ti6Al4V) have been studied namely as received (as-Ti) and abraded (ab-Ti) with SiC paper. Both samples were then immersed in 5M NaOH and 5M KOH at temperature of 60 °C for 24 hours. A passive oxide layer covered on the surface of Ti6Al4V generally changed to form alkali (Na/K) titanate layer which is mechanically unstable. Therefore, alkali-treated Ti6Al4V were heat-treated at 700 °C for 1 hour to consolidate a mechanically stable structure of amorphous alkali titanate layer. Both samples before and after heat treatment were characterized using field emission scanning electron microscope, 3D surface metrology, contact angle goniometry and X-ray diffraction. The result indicates that as-Ti treated in 5 M KOH showed an existence of porous network structure.Keywords: titanium, active surface, alkali treatment, heat treatment Abstrak Penyalutan apatit dalam cecair biomimetik adalah teknik alternatif untuk salutan logam. Faktor utama dalam penyalutan logam dengan apatit secara biomimetik yang berkesan adalah bergantung kepada sifat permukaan bahan/logam. Sifat permukaan logam boleh ditambah baik melalui proses pra-rawatan secara fizikal dan kimia. Dua persediaan yang berbeza ke atas aloi Titanium (Ti6Al4V) telah dikaji iaitu seperti yang diterima (as-Ti) dan telah dilelas (ab-Ti) dengan kertas pasir silikon karbida (SiC). Kedua-dua sampel kemudiannya direndam ke dalam 5M NaOH dan 5M KOH pada suhu 60 °C selama 24 jam. Satu lapisan oksida pasif yang meliputi atas permukaan Ti6Al4V umumnya berubah untuk membentuk lapisan alkali (Na/K) titanat yang secara mekanikal adalah tidak stabil. Oleh itu, Ti6Al4V yang telah mengalami pra-rawatan alkali telah melalui proses pemanasan haba pada suhu 700 °C selama 1 jam untuk mengukuhkan kestabilan struktur mekanikal lapisan amorfus alkali titanat. Keduadua sampel sebelum dan selepas rawatan haba telah dianalisa menggunakan mikroskop elektron imbasan pancaran medan, metrologi permukaan 3D, sudut sentuhan goniometri dan pembelauan sinar-X. Hasil daripada kajian ini menunjukkan bahawa as-Ti yang dirawat dengan 5M KOH menunjukkan jelas kewujudan struktur jaringan berliang.

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“…Thus, much effort has been devoted to apply bioactive and osteoconductive nano HA materials as coatings on implant materials for orthopedic applications (Webster et al 2002;Choi et al 2004;Bigi et al 2005;Sato et al 2005Sato et al , 2006Sato et al , 2007Balasundaram et al 2006;Evis et al 2006;Narayanan et al 2008;Teng et al 2008;Ciobanu et al 2007;Shibli and Mathai 2008). For instance, recently it has been reported that enhanced cell functions were observed on titanium coated with nano HA by an electrochemical method (Narayanan et al 2008).…”

Section: Osteoblast Adhesionmentioning

confidence: 99%

Biomimetic helical rosette nanotubes and nanocrystalline hydroxyapatite coatings on titanium for improving orthopedic implants

Zhang

Chen²,

Rodríguez³

et al. 2008

IJN

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Natural bone consists of hard nanostructured hydroxyapatite (HA) in a nanostructured protein-based soft hydrogel template (ie, mostly collagen). For this reason, nanostructured HA has been an intriguing coating material on traditionally used titanium for improving orthopedic applications. In addition, helical rosette nanotubes (HRNs), newly developed materials which form through the self-assembly process of DNA base pair building blocks in body solutions, are soft nanotubes with a helical architecture that mimics natural collagen. Thus, the objective of this in vitro study was for the fi rst time to combine the promising attributes of HRNs and nanocrystalline HA on titanium and assess osteoblast (bone-forming cell) functions. Different sizes of nanocrystalline HA were synthesized in this study through a wet chemical precipitation process following either hydrothermal treatment or sintering. Transmission electron microscopy images showed that HRNs aligned with nanocrystalline HA, which indicates a high affi nity between both components. Some of the nanocrystalline HA formed dense coatings with HRNs on titanium. More importantly, results demonstrated enhanced osteoblast adhesion on the HRN/ nanocrystalline HA-coated titanium compared with conventional uncoated titanium. Among all the HRN/nanocrystalline HA coatings tested, osteoblast adhesion was the greatest when HA nanometer particle size was the smallest. In this manner, this study demonstrated for the fi rst time that biomimetic HRN/nanocrystalline HA coatings on titanium were cytocompatible for osteoblasts and, thus, should be further studied for improving orthopedic implants.

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SEM and EDX studies of bioactive hydroxyapatite coatings on titanium implants

Cited by 32 publications

References 7 publications

A comparative study of hydroxyapatite nanoparticles synthesized by different routes

A comparative study of hydroxyapatite nanoparticles synthesized by different routes

Surface Characterization on Alkali-Heat-Treatment on Titanium Alloy

Biomimetic helical rosette nanotubes and nanocrystalline hydroxyapatite coatings on titanium for improving orthopedic implants

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