Williamson-Hall based X-ray peak profile evaluation and nano-structural characterization of rod-shaped hydroxyapatite powder for potential dental restorative procedures

Rattan, Supriya; Fawcett, Derek; Poinern, Gérrard Eddy Jai

doi:10.3934/matersci.2021023

Cited by 7 publications

(4 citation statements)

References 23 publications

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“…The diffractogram of the CP layer reflected the characteristic peaks of nanocrystalline apatite with the strongest triplet of hydroxyapatite crystal at 2 θ = 31.7°, 32.2°, and 32.9° and indexed as 211, 112, and 300. In addition, other minor peaks appear at around 26° (002), 29° (210), and 39° (310), respectively (JCPDS 01-086-1199), as it is reported in the work of Rattan et al [ 68 ] and also mentioned by [ 69 ].…”

Section: Resultssupporting

confidence: 69%

Biominerals Added Bioresorbable Calcium Phosphate Loaded Biopolymer Composites

Furkó

Horváth

Czömpöly

et al. 2022

IJMS

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Nanocrystalline calcium phosphate (CP) bioceramic coatings and their combination with biopolymers are innovative types of resorbable coatings for load-bearing implants that can promote the integration of metallic implants into human bodies. The nanocrystalline, amorphous CP particles are an advantageous form of the various calcium phosphate phases since they have a faster dissolution rate than that of crystalline hydroxyapatite. Owing to the biomineral additions (Mg, Zn, Sr) in optimized concentrations, the base CP particles became more similar to the mineral phase in human bones (dCP). The effect of biomineral addition into the CaP phases was thoroughly studied. The results showed that the shape, morphology, and amorphous characteristic slightly changed in the case of biomineral addition in low concentrations. The optimized dCP particles were then incorporated into a chosen polycaprolactone (PCL) biopolymer matrix. Very thin, non-continuous, rough layers were formed on the surface of implant substrates via the spin coating method. The SEM elemental mapping proved the perfect incorporation and distribution of dCP particles into the polymer matrix. The bioresorption rate of thin films was followed by corrosion measurements over a long period of time. The corrosion results indicated a faster dissolution rate for the dCP-PCL composite compared to the dCP and CP powder layers.

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Section: Resultssupporting

confidence: 69%

Biominerals Added Bioresorbable Calcium Phosphate Loaded Biopolymer Composites

Furkó

Horváth

Czömpöly

et al. 2022

IJMS

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“…The XRD pattern of the caCP powder demonstrates the strongest characteristic peaks of nanocrystalline or amorphous apatite at 2Θ = 31.7 • , 32.2 • and 32.9 • , along with other minor peaks around 26 • , 29 • and 39 • , respectively (JCPDS 01-086-1199). This pattern structure was also measured in other research works [50]. The spectrum in this case exhibits broad and merged peaks that support its nanocrystalline or amorphous features, or even the appearance of small, highly disordered nanoparticles [51].…”

Section: Structural Characterization Of the Samplessupporting

confidence: 84%

Amorphous, Carbonated Calcium Phosphate and Biopolymer-Composite-Coated Si3N4/MWCNTs as Potential Novel Implant Materials

Furko,

Detsch,

Horváth

et al. 2024

Nanomaterials

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A biodegradable amorphous carbonated calcium phosphate (caCP)-incorporated polycaprolactone (PCL) composite layer was successfully deposited by a spin coater. In this specific coating, the PCL acts as a bioadhesive, since it provides a better adherence of the coatings to the substrate compared to powder coatings. The caCP–PCL coatings were deposited and formed thin layers on the surface of a Si3N4–3 wt% MWCNT (multiwalled carbon nanotube) substrate, which is an emerging type of implant material in the biomedical field. The composite coatings were examined regarding their morphology, structure and biological performance. The biocompatibility of the samples was tested in vitro with MC3T3-E1 preosteoblast cells. Owing to the caCP–PCL thin layer, the cell viability values were considerably increased compared to the substrate material. The ALP and LDH tests showed numerous living cells on the investrigated coatings. The morphology of the MC3T3-E1 cells was examined by fluorescent staining (calcein and DAPI) and scanning electron microscopy, both of which revealed a well-spread, adhered and confluent monolayer of cells. All performed biocompatibility tests were positive and indicated the applicability of the deposited thin composite layers as possible candidates for orthopaedic implants for an extended period.

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“…The crystallite size (

) of the samples was calculated from the Scherrer equation (Equation (2)) [ 26 ]:

where λ is the wavelength of the X-ray radiation, k is the Scherrer constant generally taken to be 0.9, θ is the diffraction angle, and β refers to the full width at half maximum (FWHM).…”

Section: Methodsmentioning

confidence: 99%

Nano-Hydroxyapatite from White Seabass Scales as a Bio-Filler in Polylactic Acid Biocomposite: Preparation and Characterization

et al. 2022

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Nano−hydroxyapatite (nHAp) as a bio−filler used in PLA composites was prepared from fish by acid deproteinization (1DP) and a combination of acid−alkali deproteinization (2DP) followed by alkali heat treatment. Moreover, the PLA/nHAp composite films were developed using solution casting method. The mechanical and thermal properties of the PLA composite films with nHAp from different steps deproteinization and contents were compared. The physical properties analysis confirmed that the nHAp can be prepared from fish scales using both steps deproteinization. 1DP−nHAp showed higher surface area and lower crystallinity than 2DP−nHAp. This gave advantage of 1DP−nHAp for use as filler. PLA composite with 1DP−nHAp gave tensile strength of 66.41 ± 3.63 MPa and Young’s modulus of 2.65 ± 0.05 GPa which were higher than 2DP−nHAp at the same content. The addition of 5 phr 1DP−nHAp into PLA significantly improved the tensile strength and Young’s modulus. PLA composite solution with 1DP−nHAp at 5 phr showed electrospinnability by giving continuous fibers without beads.

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Williamson-Hall based X-ray peak profile evaluation and nano-structural characterization of rod-shaped hydroxyapatite powder for potential dental restorative procedures

Cited by 7 publications

References 23 publications

Biominerals Added Bioresorbable Calcium Phosphate Loaded Biopolymer Composites

Biominerals Added Bioresorbable Calcium Phosphate Loaded Biopolymer Composites

Amorphous, Carbonated Calcium Phosphate and Biopolymer-Composite-Coated Si3N4/MWCNTs as Potential Novel Implant Materials

Nano-Hydroxyapatite from White Seabass Scales as a Bio-Filler in Polylactic Acid Biocomposite: Preparation and Characterization

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