Effect of Precipitation Method on Properties of Hydroxyapatite Powders

Yoruç, Afife Binnaz Hazar; Karakas, Aysu; Ayas, Erhan; Koyun, Ahmet

doi:10.12693/aphyspola.123.371

Cited by 7 publications

(5 citation statements)

References 10 publications

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“…The absorbed and occluded water, representing the typical bands of OHgroups were detected at about 3445.66 cm −1 and 1640.18 cm −1 , correspondingly. Similar trend of typical bands of PO4 3and OHgroups were reported in the literature [19,20]. 6 Key Engineering Materials IX possess pore sizes of about 275 µm while SCHA+Mg(OH) 2 scaffolds have relatively larger pore sizes of approximately 363 µm; both scaffolds showed appropriate pore size range of ideal scaffolds for bone tissue engineering (200-500 µm).…”

Section: Resultssupporting

confidence: 80%

The Effect of Sintering Aid on Fabrication of Three-Dimensional Carbonated Hydroxyapatite Porous Scaffolds

Noor

Ismail

2019

KEM

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Three-dimensional (3D) carbonated hydroxyapatite (CHA) porous scaffolds were successfully fabricated via polyurethane (PU) replication technique. Two sets of porous CHA scaffolds were prepared using: 1) as-synthesized CHA slurry (SCHA) and (2) as-synthesized CHA slurry with the addition of sintering aid, magnesium hydroxide (SCHA+Mg (OH)2). The aim of this study was to investigate the influences of the addition of sintering aid in the fabrication of porous CHA scaffolds in terms of phase purity, crystallinity, architecture, and mechanical properties. Result suggested that both of the fabricated porous scaffolds remained as single phase B-type CHA and free of secondary phases. Interestingly, the use of Mg (OH)2 as sintering aid led to better internal architecture resulted in smoother surface and less micro-cracks/pores formation on the struts since the struts was found to be more densified as compared to SCHA scaffolds. In terms of mechanical properties, SCHA+ Mg (OH)2 scaffolds showed higher compressive strength, indicating that the use of Mg (OH)2 had successfully reduced the sintering temperature and improve the densification of porous scaffolds. Thus, SCHA+ Mg (OH)2 scaffolds was found to be a better choice of scaffold with respect to its handling, compaction strength and architecture with improve strut properties.

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Section: Resultssupporting

confidence: 80%

The Effect of Sintering Aid on Fabrication of Three-Dimensional Carbonated Hydroxyapatite Porous Scaffolds

Noor

Ismail

2019

KEM

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“…• C and the formation of new phases such us: hibonite CA 6 and β-TCP at low temperature and CA 6 and CA 2 at high temperature.…”

Section: Resultsmentioning

confidence: 99%

“…However, the principal limitation of these materials is that has low fracture strength, low toughness and poor fatigue resistance, which restricts the clinical orthopedic and dental applications [3,4]. The incorporation of a ceramic second phase dispersed in a ceramic matrix is known to improve the mechanical properties [5,6]. HA and β-TCP materials must be reinforced by alumina, because it is also classified as a bioinert material.…”

Section: Introductionmentioning

confidence: 99%

Elaboration and Characterization of Bioceramics from Natural Phosphate

2017

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The aim of this work is the substitution of the bovine bone by the natural phosphate from Djebelel-Onk (Tébessa, East of Algeria). We prepared two composites (bone/Al2O3 and natural phosphate/Al2O3) by reaction sintering. Different experimental techniques, including density, porosity, X-rays diffraction, and SEM techniques, were used to analyze the formation and transformation of phases at different temperatures. From the X-ray diffraction patterns, we put in evidence the formation of several phases. Through these results, we lighted the possibility of preparing bioceramics from natural phosphate (bone and natural phosphate). The presence of the different materials was confirmed by the micrographic observations.

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“…2) illustrated that all sintered scaffolds exhibited the characteristic bands located at about 465-475 cm -1 (v2), 550-570 and 600-609 cm -1 (v4), 960-966 cm -1 (v1), and 1020-1120 cm -1 (v3) are attributed to phosphate (PO4 3-) groups in the apatite structure [30], [32]. The typical bands of the stretching modes for hydroxyl (OH -) groups were detected at around 3400-3600 cm -1 (absorbed water) and 1600-1700 cm -1 (occluded water) [33], [34]. The results obtained thus far showed that there is no evidence of FTIR spectra disrupted with the addition of the controllable amount of divalent cation dopants (Mg 2+ , Co 2+ and Sr 2+ ) either in the binary or ternary CHA.…”

Section: Scaffold Characterizationmentioning

confidence: 98%

Influence of ternary divalent cations (Mg2+, Co2+, Sr2+) substitution on the physicochemical, mechanical and biological properties of carbonated hydroxyapatite scaffolds

B.I.

M.N.

et al. 2021

J Aust Ceram Soc

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Substitution of ionic either anion or cation in a controlled amount into carbonated hydroxyapatite (CHA) structure is one of the efficient and safest ways in enhancing the properties of the materials. However, most of the works studied only focused on the physical and mechanical properties of single ionic substitution. For the first time, the influence of simultaneous ternary substitutions of divalent cations into porous CHA scaffolds on the physicochemical, mechanical, degradation and in vitro biological properties are investigated in the present study. Three different compositions of porous scaffolds with binary and ternary divalent cations, namely, pure CHA (S11), CoSr CHA (S21) and MgCoSr CHA (S31) were fabricated using polyurethane (PU) foam replication technique. Despite a small amount of Mg 2+ , Co 2+ and Sr 2+ added, these divalent cations had successfully substituted into the Ca 2+ site and remained as single phase B-type CHA. The produced scaffolds demonstrated open, interconnected and uniform pores. Interestingly, simultaneous ternary divalent cations substitution into CHA structure had successfully enhanced the compressive strength of the sintered scaffolds, also promoted better cell attachment and activities than the binary dopedand pure CHA scaffolds. It is important to note that the right choice of divalent cation can be the determining factor in tuning the physicochemical, mechanical and biological properties of CHA scaffolds.

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Effect of Precipitation Method on Properties of Hydroxyapatite Powders

Cited by 7 publications

References 10 publications

The Effect of Sintering Aid on Fabrication of Three-Dimensional Carbonated Hydroxyapatite Porous Scaffolds

The Effect of Sintering Aid on Fabrication of Three-Dimensional Carbonated Hydroxyapatite Porous Scaffolds

Elaboration and Characterization of Bioceramics from Natural Phosphate

Influence of ternary divalent cations (Mg2+, Co2+, Sr2+) substitution on the physicochemical, mechanical and biological properties of carbonated hydroxyapatite scaffolds

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