Effect of low temperature crystallization on 58S bioactive glass sintering and compressive strength

Panah, Neda Ghaebi; Sercombe, T.B.

doi:10.1016/j.ceramint.2021.07.215

Cited by 8 publications

(5 citation statements)

References 31 publications

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“…This is followed by polycondensation reactions between the networks and resulted in gel formation. The gel is then aged to increase the amount of polycondensation processes and improve the chemical stability of the final products 26 . The gel is now known as xerogel after it has been dried to remove the solvent (water or ethanol).…”

Section: Discussionmentioning

confidence: 99%

“…This can be explained by its high specific surface area, which will increase the contact surface area of BG, thereby increasing more nucleation sites for apatite creation and enhancing its biodegradation and bioactivity 29 . Factors that may influence the particle size of sol–gel biomaterials include the concentration of ammonia, the used of distilled water, as well as the types of alcohol and acid use as catalyzers that will influence the ultimate size of the particles synthesized 15,21,26,30 …”

Section: Discussionmentioning

confidence: 99%

“…Increasing the heat treatment temperature above the crystallization temperature will lead to a crystalline structure 36 . Crystallization of BG S58 is known to occur between 495°C to 650°C, 26,37 and this might explain the mixed amorphous and partial crystalline structures, comprising pseudo‐crystalline CaO and CaCO 3 phases. Another explanation for these partial crystalline structures was the possibility of crystallization occurring at low temperatures due to calcium phosphate segregation from silica at the dehydration stage 38,39 .…”

Section: Discussionmentioning

confidence: 99%

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Effect of ammonia catalyst on the morphological structures of sol–gel‐derived bioactive glass 58S for dental application

Lin

Zabidi

Lai

et al. 2022

Oral Science International

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Aim: To determine the effect of ammonia on the surface morphology and chemical properties of sol-gel-derived bioactive glass 58S powders for dental application.Materials and Methods: Bioactive glass (BG) 58S powder was synthesized using a sol-gel method. Hydrochloric acid solution was mixed with ethanol, distilled water, and tetraethyl orthosilicate for 30 min, followed by the addition of triethyl phosphate and calcium nitrate tetrahydrate. The mixture was stirred until the particles were completely dissolved. Three different groups were prepared: BG-1 (no ammonia added), BG-2 (3 ml of ammonia added), and BG-3 (5 ml of ammonia added). The gel was then aged and calcined. The solidified gel was crushed until the powder passed through a 200-μm sieve. Subsequently, the surface morphology was evaluated using a scanning electron microscopy, whereas the chemical composition was assessed using a Fourier transform infrared spectroscopy (FTIR).Results: BG-2 and BG-3 exhibited small-sized cluster grains and a more porous micro-or nano-structures. The crystallinity of the BG powder and its surface porosity increased with increased ammonia. The average microparticle sizes of the BG-1, BG-2, and BG-3 were 196 AE 31, 45 AE 21, and 20 AE 9 μm, respectively, with nanograins in BG-2 and BG-3 showed strong tendency of agglomeration. FTIR verified the existence of a silica network-based glass, with the Si-O-Si functional group visible in the spectrum of all groups. Conclusion:The addition of ammonia as catalyst during the hydrolysis process resulted in small glassy grains and more porous surfaces of BG 58S, which is anticipated to promote greater bioactivity.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Effect of ammonia catalyst on the morphological structures of sol–gel‐derived bioactive glass 58S for dental application

Lin

Zabidi

Lai

et al. 2022

Oral Science International

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“…Indeed, the compression strength was increased due to high temperature sintering up to 29 MPa at 1200 °C for 12 h. However, the bioactive glass was crystallized, thereby reducing the bioactivity of the 58S bioactive glass. 37 Similarly, Sharifianjazi et al 38 developed magnesium (Mg)and strontium (Sr)-doped bioactive glass (60 SiO 2 , 4P 2 O 5 , 36x/y CaO; x ∼Mg, y ∼Sr) with improved elastic moduli of 90 GPa (in 58S BG with 10 wt % MgO) and 113 GPa (in 58S BG with 10 wt % SrO) due to the formation of strong Mg−O−Si and Sr−O−Si bonds. However, the BG powder was calcined at 800 °C, which led to the crystallization of BG, hence reducing its bioactivity, and the antibacterial aspects of these biocomposites are not discussed.…”

Section: Introductionmentioning

confidence: 99%

“…In another study, Dehaghani and Ahmadian improved the mechanical properties (compression strength) via sintering of Co–Cr–Mo/58S bioactive glass porous nanocomposites at high temperatures of 1100 –1250 °C. Indeed, the compression strength was increased due to high temperature sintering up to 29 MPa at 1200 °C for 12 h. However, the bioactive glass was crystallized, thereby reducing the bioactivity of the 58S bioactive glass . Similarly, Sharifianjazi et al developed magnesium (Mg)- and strontium (Sr)-doped bioactive glass (60 SiO 2 , 4P 2 O 5 , 36-x/y CaO; x ∼Mg, y ∼Sr) with improved elastic moduli of 90 GPa (in 58S BG with 10 wt % MgO) and 113 GPa (in 58S BG with 10 wt % SrO) due to the formation of strong Mg–O–Si and Sr–O–Si bonds.…”

Section: Introductionmentioning

confidence: 99%

Multifunctional 58S Bioactive Glass/Silver/Cerium Oxide-Based Biocomposites with Effective Antibacterial, Cytocompatibility, and Mechanical Properties

Singh,

Shakya,

Gupta

et al. 2024

ACS Appl. Mater. Interfaces

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58S bioactive glass (BG) has effective biocompatibility and bioresorbable properties for bone tissue engineering; however, it has limitations regarding antibacterial, antioxidant, and mechanical properties. Therefore, we have developed BG AC biocomposites by reinforcing 58S BG with silver and ceria nanoparticles, which showed effective bactericidal properties by forming inhibited zones of 2.13 mm (against Escherichia coli) and 1.96 mm (against Staphylococcus aureus; evidenced by disc diffusion assay) and an increment in the antioxidant properties by 39.9%. Moreover, the elastic modulus, hardness, and fracture toughness were observed to be increased by ∼84.7% (∼51.9 GPa), ∼54.5% (∼3.4 GPa), and ∼160% (∼1.3 MPam 1/2 ), whereas the specific wear rate was decreased by ∼55.2% (∼1.9 × 10 −11 m 3 / Nm). X-ray diffraction, high-resolution transmission electron microscopy, and field emission scanning electron microscopy confirmed the fabrication of biocomposites and the uniform distribution of the nanomaterials in the BG matrix. The addition of silver nanoparticles in the 58S BG matrix (in BG A ) increased mechanical properties by composite strengthening and bactericidal properties by damaging the cytoplasmic membrane of bacterial cells. The addition of nanoceria in 58S BG (BG C ) increased the antioxidant properties by 44.5% (as evidenced by the 2,2-diphenyl-1-picrylhydrazyl assay). The resazurin reduction assay and MTT assay confirmed the effective cytocompatibility for BG AC biocomposites against mouse embryonic fibroblast cells (NIH3T3) and mouse bone marrow stromal cells. Overall, BG AC resulted in mechanical properties comparable to those of cancellous bone, and its effective antibacterial and cytocompatibility properties make it a good candidate for bone healing.

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Bioinspired 3D scaffolds with antimicrobial, drug delivery, and osteogenic functions for bone regeneration

Atkinson,

Seciu-Grama,

Serafim

et al. 2023

Drug Deliv. and Transl. Res.

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Effect of low temperature crystallization on 58S bioactive glass sintering and compressive strength

Cited by 8 publications

References 31 publications

Effect of ammonia catalyst on the morphological structures of sol–gel‐derived bioactive glass 58S for dental application

Effect of ammonia catalyst on the morphological structures of sol–gel‐derived bioactive glass 58S for dental application

Multifunctional 58S Bioactive Glass/Silver/Cerium Oxide-Based Biocomposites with Effective Antibacterial, Cytocompatibility, and Mechanical Properties

Bioinspired 3D scaffolds with antimicrobial, drug delivery, and osteogenic functions for bone regeneration

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