Evaluation of experimental bioactive glass resin composites

Firdausy, Muhammad Dian

doi:10.5353/th_b5573064

Cited by 2 publications

(3 citation statements)

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“…Therefore, the mimicry of bioactivity using SBF is still debatable. In addition, a previous study [15] showed the apatite could form on 70 wt% 45S5 BAG-loaded UDMA-based resin composites after 7 days immersion in SBF (Fig. 1a).…”

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confidence: 59%

“…It should be noticed that their composites contained 80 wt% BAG as fillers, which was much higher than 0.0-7.7 vol% (0-20 wt%) used in the current study. Furthermore, apatite was also formed on 70 wt% 45S5 BAG-loaded resin composites [15]. Thus, the difference in the contents of BAG fillers may result in the variations in these two research outcomes.…”

Section: Calcium Phosphate (Cap) Formation In the Different Immersion...mentioning

confidence: 99%

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A biomimetic approach to evaluate mineralization of bioactive glass-loaded resin composites

et al. 2022

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Bioactive glasses (BAG), first melt-derived in the late 1960s by Larry Hench, obtained good clinical results in dentistry, due to their properties of good bioactivity, when used to treat bone defects [1]. The composition of this bioactive glass was 45 wt% SiO 2 , 24.5 wt% Na 2 O, 24.5 wt% CaO, and 6 wt% P 2 O 5 , which was later termed as 45S5 or Bioglass®. Recently, various researchers have incorporated BAG into experimental[2-5] and commercial dental resin composite materials [6]. The release of calcium and phosphate ions was used as a means to assist with prevention of demineralization of dentine from an initial caries attack. Furthermore, BAG-containing resin compos-ites can reduce bacterial penetration into marginal gaps due to their ability to increase local pH, precipitate apatite on the surface, or in this case within the gap [7]. In addition, a novel design of resin composite-based implant containing bioactive glass has successfully been used for many years [8,9]. The fiber-reinforced composite implants loaded with bioactive glass were supported to enhance biological bone repair and the formation of vascularized structures, in addition to providing improved antimicrobial properties for implants. Chemically speaking, this type of "bioactive" action is a mineralization reaction. At the beginning, a silica-rich layer with Si-OH groups forms on the surface by the exchange of Na + and Ca 2+ ions from the glass with surrounding H + ions, which increases surrounding pH. Then, Ca 2+ and PO 3 4− from surrounding solution forms amorphous calcium phosphate (ACP, Ca x (PO 4 ) y •nH 2 O)[10] on the surface, which is transformed into octacalcium phosphate (OCP, Ca 8 (HPO 4 ) 2 (PO 4 ) 4 •5H 2 O) [10] and finally evolves into nanocrystalline carbonated hydroxyapatite (CHA, Ca 10−x (PO 4 ) 6−x (CO 3 ) x (OH) 2−x−2y (CO 3 ) y ) not hydroxyapatite (HA, Ca 10 (PO 4 ) 6 (OH) 2 ) in human body as bone or tooth enamel [11,12].

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confidence: 59%

Section: Calcium Phosphate (Cap) Formation In the Different Immersion...mentioning

confidence: 99%

A biomimetic approach to evaluate mineralization of bioactive glass-loaded resin composites

et al. 2022

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“…Moreover, communitybased alleviation programmes become progressively more difficult as cities increase in size. And yet, this is precisely the trend that is occurring throughout the developing world, making the legitimization of community-based strategies even more difficult (Firdausy 1994;Moser 1995).…”

Section: Urban Poverty and Structural Adjustment In A Global Contextmentioning

confidence: 99%

Urban Food Systems and the Poor in Developing Countries

Smith¹

1998

Trans Inst British Geog

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In many cities in developing countries, hunger and malnutrition are common amongst the poor, even when food is relatively abundant. Over the past two decades, a considerable literature has accumulated on the problems associated with rapid urbanization in developing countries -a literature that for the most part has neglected the important dimension of urban food systems and how these link production and consumption networks at local, regional and global levels. Similarly, whilst there is a newly burgeoning literature on global food systems, the contextual role of the urbanization process is rarely addressed. This paper attempts to fuse these two major areas of geographical investigation to highlight the issues that need to be addressed in future research programmes so that improved diets become accessible to all urban dwellers. key words developing countries urbanization food systems poverty globalization Africa

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Evaluation of experimental bioactive glass resin composites

Cited by 2 publications

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A biomimetic approach to evaluate mineralization of bioactive glass-loaded resin composites

A biomimetic approach to evaluate mineralization of bioactive glass-loaded resin composites

Urban Food Systems and the Poor in Developing Countries

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