Devitrification study of a novel bioactive glass designed on the CaSiO3 – Ca3(PO4)2 – MgCa(SiO3)2 system

Rodrigo-Vázquez, C. Sara; Rodrı́guez, Miguel Á.; Aza, Antonio H. De

doi:10.1016/j.jnoncrysol.2019.119705

Cited by 4 publications

(2 citation statements)

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“…The XRD of LW2 sample demonstrated phases of Li 2 SiO 3 with little quartz and residual glass (figure 1) [22].…”

Section: Resultsmentioning

confidence: 99%

Bioactivity and characterization of Wollastonite-Li-silicate glass

Aldawsari,

Eldera,

El-Bassyouni

et al. 2023

Phys. Scr.

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Glasses were prepared from nominal wollastonite-lithium silicate in the ratios of 87.5/12.5, 75/25, 50/50, 25/75, and glasses respectively. However, the glass of 25/75 ratio run through devitrification into lithium silicate and little quartz whereas, the other three ratios formed transparent glasses. The thermal behavior of glasses shows a decrease in the main exothermic temperature; which goes along with an increase in the lithium silicate content. Sintering of such glasses at the crystallization temperature given by differential thermal analysis (at 607 °C + 705 °C and at 661 °C) or at one step at 1000 °C, indicates the formation of three phases of pseudowollastonite [Ca3(Si3O9)], wollastonite (CaSiO3), and lithium silicate (Li2SiO3). The results of the in-vitro test by means of soaking in SBF for two weeks tracked by scanning the sample's surface and measuring the calcium and phosphorous ions using induced coupled plasma (ICP) in the SBF, exhibited that samples had improved talent to accelerate the mineralization of calcium phosphate and that the ratio of Ca/P declined from 2.55 to 1.86 upon increment of the Li2O ratio. The X-ray analysis shows the formation of hydroxyapatite on the sample’s surfaces. The biocompatibility and thermal properties of the premeditated glass ceramics secure exceptional properties and can be used to impress different biomedical applications.

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“…The XRD of LW2 sample demonstrated phases of Li 2 SiO 3 with little quartz and residual glass (figure 1) [22].…”

Section: Resultsmentioning

confidence: 99%

Bioactivity and characterization of Wollastonite-Li-silicate glass

Aldawsari,

Eldera,

El-Bassyouni

et al. 2023

Phys. Scr.

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“…Rodrigo-Vázquez et al reported that crystalline peaks corresponding to pseudowollastonite were detected in the additive-manufactured 62W glass (T w ≈ 150 °C) scaffold [ 186 ]. As the 62W glass underwent devitrification after at 1 h of heat treatment under 900 °C, it is believed that the transient temperature during laser processing was much higher than 900 °C to induce the partial crystallization of 62 W glass in a short period of laser irradiation [ 187 ]. Therefore, a systematic analysis of the temperature–viscosity profile of BG and meticulous configuration of the SLS processing parameters are required for the direct SLS of a fully amorphous BG.…”

Section: Additive Manufacturing Of Bg and Bg/polymer Composites And T...mentioning

confidence: 99%

Additive Manufacturing of Bioactive Glass and Its Polymer Composites as Bone Tissue Engineering Scaffolds: A Review

Yin

Gao

2023

Bioengineering

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Bioactive glass (BG) and its polymer composites have demonstrated great potential as scaffolds for bone defect healing. Nonetheless, processing these materials into complex geometry to achieve either anatomy-fitting designs or the desired degradation behavior remains challenging. Additive manufacturing (AM) enables the fabrication of BG and BG/polymer objects with well-defined shapes and intricate porous structures. This work reviewed the recent advancements made in the AM of BG and BG/polymer composite scaffolds intended for bone tissue engineering. A literature search was performed using the Scopus database to include publications relevant to this topic. The properties of BG based on different inorganic glass formers, as well as BG/polymer composites, are first introduced. Melt extrusion, direct ink writing, powder bed fusion, and vat photopolymerization are AM technologies that are compatible with BG or BG/polymer processing and were reviewed in terms of their recent advances. The value of AM in the fabrication of BG or BG/polymer composites lies in its ability to produce scaffolds with patient-specific designs and the on-demand spatial distribution of biomaterials, both contributing to effective bone defect healing, as demonstrated by in vivo studies. Based on the relationships among structure, physiochemical properties, and biological function, AM-fabricated BG or BG/polymer composite scaffolds are valuable for achieving safer and more efficient bone defect healing in the future.

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