Structures and dissolution behaviors of CaO–P2O5–TiO2/Nb2O5 (Ca/P ≥ 1) invert glasses

Lee, Sungho; Maeda, Hirotaka; Obata, Akiko; Ueda, Kyosuke; Narushima, Takayuki; Kasuga, Toshihiro

doi:10.1016/j.jnoncrysol.2015.06.024

Cited by 20 publications

(11 citation statements)

References 30 publications

(32 reference statements)

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“…The following Raman bands corresponding to the silicate Q Si n (n = 0-3) groups29,30 and orthophosphate (Q P 0 ) group31,32 were observed: the symmetric stretching mode of Q Si 3 (~1030 cm −1 ), symmetric stretching mode of Q Si 2 (~970 cm −1 ), symmetric stretching mode of Q Si 1 (~910 cm −1 ), symmetric stretching mode of Q Si 0 (~850 cm −1 ), Si-O stretching linkages (~640 cm −1 ), and symmetric stretching mode of the non-bridging oxygen in Q P 0 (~950 cm −1 ). BG Mg may contain low amount of Q Si (A) Raman spectra for BG M and (B) integrated portion of the Q Si n groups in BG M .…”

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confidence: 99%

Development of bifunctional oriented bioactive glass/poly(lactic acid) composite scaffolds to control osteoblast alignment and proliferation

Lee

Matsugaki

Kasuga

et al. 2019

J Biomedical Materials Res

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During the bone regeneration process, the anisotropic microstructure of bone tissue (bone quality) recovers much later than bone mass (bone quantity), resulting in severe mechanical dysfunction in the bone. Hence, restoration of bone microstructure in parallel with bone mass is necessary for ideal bone tissue regeneration; for this, development of advanced bifunctional biomaterials, which control both the quality and quantity in regenerated bone, is required. We developed novel oriented bioactive glass/poly(lactic acid) composite scaffolds by introducing an effective methodology for controlling cell alignment and proliferation, which play important roles for achieving bone anisotropy and bone mass, respectively. Our strategy is to manipulate the cell alignment and proliferation by the morphological control of the scaffolds in combination with controlled ion release from bioactive glasses. We quantitatively controlled the morphology of fibermats containing bioactive glasses by electrospinning, which successfully induced cell alignment along the fibermats. Also, the substitution of CaO in Bioglass®(45S5) with MgO and SrO improved osteoblast proliferation, indicating that dissolved Mg 2+ and Sr 2+ ions promoted cell adhesion and proliferation. Our results indicate that the fibermats developed in this work are candidates for the scaffolds to bone tissue regeneration that enable recovery of both bone quality and bone quantity. © 2019 The Authors. journal Of Biomedical Materials Research Part A Published By Wiley Periodicals, Inc. J Biomed Mater Res Part A: 107A: 1031–1041, 2019.

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confidence: 99%

Development of bifunctional oriented bioactive glass/poly(lactic acid) composite scaffolds to control osteoblast alignment and proliferation

Lee

Matsugaki

Kasuga

et al. 2019

J Biomedical Materials Res

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“…Two overlapped peaks between 10 and −25 ppm were detected and assigned to Q p 0 and Q p 1 units (structural representation given in Fig. 3(B)) 14,15) . They are characteristic of phosphate invert glasses, which structurally consist of short phosphate chains and charge balanced with cations 31,32) .…”

Section: Resultsmentioning

confidence: 99%

“…Such behavior can be obtained with niobium-containing phosphate invert glasses (Nb-PIGs) 14,15) . Nb-PIGs are composed of short phosphate group, e.g., ortho-and pyrophosphates (Q p 0 and Q p 1 ), cross-linked together with tetrahedral niobia NbO 4 forming a glass network (P-O-Nb bonds) 14,15) .…”

Section: Introductionmentioning

confidence: 99%

“…Nb-PIGs are composed of short phosphate group, e.g., ortho-and pyrophosphates (Q p 0 and Q p 1 ), cross-linked together with tetrahedral niobia NbO 4 forming a glass network (P-O-Nb bonds) 14,15) . Compared to conventional phosphate invert glasses, the introduction of niobia signi cantly improved the chemical durability of the glasses [14][15][16] . Nb-PIGs can release ions such as Ca 2+ , P…”

Section: Introductionmentioning

confidence: 99%

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Preparation of Antibacterial ZnO-CaO-P2O5-Nb2O5 Invert Glasses

et al. 2016

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ZnO-CaO-P 2 O 5 -Nb 2 O 5 invert glasses, with ZnO substituted for CaO, were successfully prepared using a melt-quenching method. Their structures, dissolution behaviors, and antibacterial abilities were evaluated. Niobate switched its role of network former to modi er with increasing ZnO content, as Zn 2+ ions preferentially coordinated with phosphate groups. In parallel, with increasing content of ZnO in the glasses, P-O-Zn bonds were formed, which crosslinked phosphate groups with ZnO acting as a network former. As a result, the glass-forming ability and chemical durability of the glasses were improved. The glasses showed antibacterial ability to gram-positive and -negative bacteria.

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“…The additive of Nb 2 O 5 into PIGs play important roles in their glass formation and dissolution behavior. 1,2) Sometimes, the phosphate groups have been reported to be cross-linked with a 4-oxygencoordinated niobium group, 5) assisting the formation of the glass network; with increasing Nb 2 O 5 amount, the number of PONb bonds, which are stronger than the POP bonds, 6) increases. The formation of the PONb bonds controls the ion-release from the glasses in a Tris buffer solution.…”

Section: Introductionmentioning

confidence: 99%

Structural Analysis of 65ZnO–30P2O5–5Nb2O5 Invert Glass Using X-ray Photoelectron Spectroscopy

et al. 2019

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The 65ZnO30P 2 O 5 5Nb 2 O 5 (ZnPNbO) glass is one of the promising candidate antibacterial biomaterials; it is a safe material since the release of Zn 2+ ions from the glass is well-controlled. To discuss the origin of this controlled release from the view point of its glass structure, the amount and state of bridging oxygen in the glass was examined using X-ray photoelectron spectroscopy, and compared with those in 65CaO 30P 2 O 5 5Nb 2 O 5 (CaPNbO) glass. The number of POP bonds in ZnPNbO glass was larger and that of PONb bonds was smaller than those in CaPNbO glass. This was linked with the formation of a large number of POZn bonds. The outermost shell electron density of the cations in ZnPNbO glass decreased, and as a result, the binding energy of each element increased. These might be closely related to the controlled release of Zn 2+ ions.

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Structures and dissolution behaviors of CaO–P2O5–TiO2/Nb2O5 (Ca/P ≥ 1) invert glasses

Cited by 20 publications

References 30 publications

Development of bifunctional oriented bioactive glass/poly(lactic acid) composite scaffolds to control osteoblast alignment and proliferation

Development of bifunctional oriented bioactive glass/poly(lactic acid) composite scaffolds to control osteoblast alignment and proliferation

Preparation of Antibacterial ZnO-CaO-P<sub>2</sub>O<sub>5</sub>-Nb<sub>2</sub>O<sub>5</sub> Invert Glasses

Structural Analysis of 65ZnO–30P<sub>2</sub>O<sub>5</sub>–5Nb<sub>2</sub>O<sub>5</sub> Invert Glass Using X-ray Photoelectron Spectroscopy

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