Bioactive Glasses in Dental Applications (Literature Review)

Mahdi, Ola Saleh

doi:10.29196/jubes.v27i2.2339

Cited by 2 publications

(2 citation statements)

References 23 publications

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“…On the surface of all three PO 4 -containing glasses, a phosphorus-containing reaction layer was formed already after 30-min soaking [44]. This reaction layer was not continuous, and its composition also changed from place to place.…”

Section: Bioactivitymentioning

confidence: 94%

Network structure and thermal properties of bioactive (SiO2–CaO–Na2O–P2O5) glasses

et al. 2019

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Ca-and P-based bioactive glasses are excellent candidates for design and manufacture of biomaterials. Understanding the structure and physico-chemical-thermal behaviour of bioactive glasses is a fundamental step towards the design of a new generation of biocompatible materials. In this study, the structure of SiO 2-CaO-Na 2 O glasses and its derivatives, obtained by substituting Na 2 O with P 2 O 5 and prepared by melt-quench technique, was studied with neutron and electron diffraction techniques combined with thermal analysis, high-resolution electron microscopy and X-ray photoelectron spectroscopy. Neutron and electron diffraction data were analysed with reverse Monte Carlo simulation and pair distribution function analysis, respectively. Bioactivity of P 2 O 5 substituted glasses was also investigated and proven in vitro using simulated body fluid. Based on the structural analysis, it was found that Si and P atoms are in well-defined tetrahedral units with a bond distance of 1.60 Å for both Si-O and P-O bonds, although P exhibits a higher average coordination number than Si. With increasing phosphate content, tendentious changes in the glass behaviour were observed. Linear increase in T g , supported by the changes in the average coordination numbers of Si and P, indicates strengthening of network structure with increasing P content and formation of P-O-Ca atomic linkages, which lead to CaP rich atomic environments in the silicate network. These CaP rich environments trap volatile elements and thus decrease the total weight loss during heating at higher P concentrations. In the case of the highest investigated P 2 O 5 content (5 mol%), nanoscale structural inhomogeneity and the formation of CaP rich clusters were also revealed by electron diffraction and atomic resolution imaging. This type of Ca-(Na)-P clustering has a key role in the behaviour of phosphate-substituted silicate glasses under physiological conditions.

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Section: Bioactivitymentioning

confidence: 94%

Network structure and thermal properties of bioactive (SiO2–CaO–Na2O–P2O5) glasses

et al. 2019

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“…Which extends high to catch the moving air from the prevailing winds and to provide air movement through the building in warm climate areas. (1) The designer repurposed the barleys in the buildings of Qatar University, as well as in Masdar City in the Emirates, in order to achieve zero heat emissions. The idea of "barleys" was adopted to be an inspiration in the design of cooling systems.…”

Section: Wind Shovels ) Malqaf)mentioning

confidence: 99%

Design Solutions and Architectural Treatments to Achieve Thermal Comfort in the Interior Space of the Building

ElHussieny

2023

Resourceedings

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All countries of the world are moving to take measures to develop solutions to confront climate change, build resilience, and adapt to the inevitable effects of climate change, the growing energy crisis, and record concentrations of greenhouse gases... Here comes the role of architectural solutions, through successful designs using raw materials appropriate to the climate. It is hot in the Arab countries, especially the countries located in the desert climate region, which requires reusing some traditional architectural concepts with more modern designs, relying on technology, and using new methods of thermal insulation in order to make the building and the interior space more comfortable for the user by achieving thermal comfort. The research aims to study the architectural and design concepts and solutions in hot areas, humidify and renew the indoor air, and direct solar energy in a way that suits the nature of the climate and location in hot desert areas and encourage the concept of sustainable, environmentally friendly architecture, to rationalize energy consumption as one of the pillars on which the success of sustainable development in any country depends. Community and selection of advanced technology in a way that does not negatively affect the interior space.

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Bioactive Glasses in Dental Applications (Literature Review)

Cited by 2 publications

References 23 publications

Network structure and thermal properties of bioactive (SiO2–CaO–Na2O–P2O5) glasses

Network structure and thermal properties of bioactive (SiO2–CaO–Na2O–P2O5) glasses

Design Solutions and Architectural Treatments to Achieve Thermal Comfort in the Interior Space of the Building

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