Comparison of microstructure and chemical composition of hydroxyapatite and fluorapatite coatings deposited on Ti-6Al-4V substrates by Nd-YAG laser

Chien, Chi-Sheng; Kuo, Tsung-Yuan; Liu, C. W.; Lin, Hsin-Yi; Liao, Tze Yuan; Hong, T.; Lee, Tzer Min

doi:10.1179/1432891714z.0000000001302

Cited by 9 publications

(14 citation statements)

References 25 publications

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“…8 Cross-sectional hardness profiles of FA/Al 2 O 3 specimenstechnique used and the parameter settings applied. For example, recent studies have shown that their hardness may range from 260 to 1000 HV[21,[37][38][39]. The results obtained in this study have shown that the addition of Al 2 O 3 to FA yields a hardness value of up to 1300 HV.…”

supporting

confidence: 47%

“…5, some ions still remain within the CL. It is noted, however, that some of the P ions produced in the FA decomposition process simply vaporize in the high-temperature cladding process [21,22]. Observing the results presented in Fig.…”

Section: Resultsmentioning

confidence: 70%

“…Many studies have shown that laser cladding enhances the bonding strength between bioceramic materials such as HA and FA and metallic substrates and hence inhibits the disintegration and detachment of the coating layer [21][22][23][24][25]. In a previous study [22], the present group investigated the effects of TiO 2 addition on the surface microstructure and bioactivity of FA coatings deposited on Ti6Al4V substrates using an Nd:YAG laser.…”

Section: Introductionmentioning

confidence: 93%

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Bioactivity of fluorapatite/alumina composite coatings deposited on Ti6Al4V substrates by laser cladding

et al. 2016

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Hydroxyapatite (HA) is one of the most commonly used coating materials for metal implants. However, following high-temperature deposition, HA easily decomposes into an unstable phase or forms an amorphous phase, and hence, the long-term stability of the implant is reduced. Accordingly, the present study investigates the use of fluorapatite (FA) fortified with 20 wt% alumina (a-Al 2 O 3 ) as an alternative biomedical coating material. The coatings are deposited on Ti6Al4V substrates using a Nd:YAG laser cladding process performed with laser powers and travel speeds of 400 W/200 mm/min, 800 W/400 mm/min and 1200 W/600 mm/min, respectively. The results show that for all of the specimens, a strong metallurgical bond is formed at the interface between the coating layer and the transition layer due to melting and diffusion. The XRD analysis results reveal that the cladding layers in all of the specimens consist mainly of FA, b-TCP, CaF 2 , Ti and h-Al 2 O 3 phases. In addition, the cladding layers of the specimens prepared using laser powers of 400 and 800 W also contain CaTiO 3 and CaAl 2 O 4 , while that of the specimen clad using a power of 1200 W contains TTCP and CaO. Following immersion in simulated body fluid for 14 days, all of the specimens precipitate dense bone-like apatite and exhibit excellent bioactivity. However, among all of the specimens, the specimen that is prepared with a laser power of 800 W shows the best biological activity due to the presence of residual FA, apatite-generating CaTiO 3 and a rough cladding layer surface.

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supporting

confidence: 47%

Section: Resultsmentioning

confidence: 70%

Section: Introductionmentioning

confidence: 93%

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Bioactivity of fluorapatite/alumina composite coatings deposited on Ti6Al4V substrates by laser cladding

et al. 2016

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“…Bioactive glass and polymer composition are essential in the increase of Ca and P percentages [16]. Hydroxyapatite in the scaffold plays an important role in attracting Ca and P, while the polymers act as the matrix for new hydroxyapatite accumulation [17].…”

Section: Discussionmentioning

confidence: 99%

Composition of chitosan-hydroxyapatite-collagen composite scaffold evaluation after simulated body fluid immersion as reconstruction material

Verisqa

Triaminingsih

Corputty

2017

J. Phys.: Conf. Ser.

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Abstract. Hydroxyapatite (HA) formation is one of the most important aspects of bone regeneration. Because domestically made chitosan-hydroxyapatite-collagen composite scaffolding from crab shell and bovine bone and tendon has potential as a maxillofacial reconstruction material, the material's HA-forming ability requires evaluation. The aim of this research is to investigate chitosan-hydroxyapatite-collagen composite scaffold's potential as a maxillofacial reconstruction material by observing the scaffold's compositional changes. Scaffold specimens were immersed in 37°C simulated body fluid (SBF) for periods of 2, 4, 6, and 8 days. Scaffold composition was then evaluated by using energy dispersive spectroscopy (EDS). The calcium (Ca) and phosphorus (P) percentages of the scaffold were found to increase following SBF immersion. The high Ca/P ratio (3.82) on the scaffold indicated HA formation. Ion exchange played a significant role in the increased percentages of Ca and P, which led to new HA layer formation. The scaffold's HA acted as a nucleation site of Ca and P from the SBF, with collagen and chitosan as the scaffold's matrix. Chitosan-hydroxyapatitecollagen composite scaffold shows potential as a maxillofacial reconstruction material, since its composition favors HA formation.

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“…We have previously demonstrated fiber laser surface modification of CP-Ti and Ti6Al4V using a continuous wave (CW) 200W fiber laser system at 1064nm, reducing the initial bacterial adhesion of S. aureus and also exerting a bactericidal effect ( Chan et al., 2017 ). Other studies have shown laser-texturing of Ti6Al4V using a Nd:YVO 4 laser with a wavelength of 532nm to improve bone implant contact to a similar level as hydroxyapatite-coated and grit-blasted implants in ovine models ( Coathup et al., 2017 ), and laser engineering as a technique used to affix biocompatible compounds such as hydroxyapatite to the surface of the orthopedic implant as a means of improving osseointegration ( Chien et al., 2014 ; Mukherjee et al., 2017 ).…”

Section: Surface Modification Of Titanium Orthopedic Materialsmentioning

confidence: 99%

Titanium for Orthopedic Applications: An Overview of Surface Modification to Improve Biocompatibility and Prevent Bacterial Biofilm Formation

et al. 2020

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Summary Titanium and its alloys have emerged as excellent candidates for use as orthopedic biomaterials. Nevertheless, there are often complications arising after implantation of orthopedic devices, most notably prosthetic joint infection and aseptic loosening. To ensure that implanted devices remain functional in situ , innovation in surface modification has attracted much attention in the effort to develop orthopedic materials with optimal characteristics at the biomaterial-tissue interface. This review will draw together metallurgy, surface engineering, biofilm microbiology, and biomaterial science. It will serve to appreciate why titanium and its alloys are frequently used orthopedic biomaterials and address some of the challenges facing these biomaterials currently, including the significant problem of device-associated infection. Finally, the authors shall consolidate and evaluate surface modification techniques employed to overcome some of these issues by offering a unique perspective as to the direction in which research is headed from a broad, interdisciplinary point of view.

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Comparison of microstructure and chemical composition of hydroxyapatite and fluorapatite coatings deposited on Ti-6Al-4V substrates by Nd-YAG laser

Cited by 9 publications

References 25 publications

Bioactivity of fluorapatite/alumina composite coatings deposited on Ti6Al4V substrates by laser cladding

Bioactivity of fluorapatite/alumina composite coatings deposited on Ti6Al4V substrates by laser cladding

Composition of chitosan-hydroxyapatite-collagen composite scaffold evaluation after simulated body fluid immersion as reconstruction material

Titanium for Orthopedic Applications: An Overview of Surface Modification to Improve Biocompatibility and Prevent Bacterial Biofilm Formation

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