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Samuneva, B.; Ivanova, Y.; Djambaski, P.; Stefanova, S.; Dimitriev, Y.; Dimitrova-Lukacs, Margarita

doi:10.1023/a:1008647404796

Cited by 9 publications

(3 citation statements)

References 4 publications

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“…In our previous work we have synthesized with the help of sol-gel technology some bioactive ceramics, containing HA and different other phases such as: mullite [3,35,36], anorthite-gehlenite [37]; HA and crystalline phases from the systems ZnO-SiO 2 , ZnO-Al 2 O 3 -SiO 2 , ZnO-CaO-2SiO 2 [38]; HA and crystalline phases from the MgO-SiO 2 and MgO-Al 2 O 3 -SiO 2 systems [39]. We have also shown that bioactive hybrid materials were synthesized in SiO 2 -P 2 O 5 -TiO 2 -CaO-PVA system.…”

Section: Introductionmentioning

confidence: 99%

Sol-gel bioactive glass-ceramics Part I: Calcium phosphate silicate/wollastonite glass-ceramics

et al. 2009

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Abstract:In this work we present experimental results about synthesis, structure evolution and in vitro bioactivity of new calcium phosphate silicate/wollastonite (CPS/W) glass-ceramics. The samples obtained were synthesized via polystep sol-gel process with different Ca/P+Si molar ratio (R). The structure of the materials obtained was studied by XRD, FTIR spectroscopy and SEM. XRD showed the presence of Ca 15 (PO 4 ) 2 (SiO 4 ) 6 , β-CaSiO 3 and α-CaSiO 3 for the sample with R=1.89 after thermal treatment at 1200°C/2h. The XRD results are in good agreement with FTIR analysis. SEM denotes that apatite formation can be observed after soaking in simulated body fluid (SBF). © Versita Warsaw and Springer-Verlag Berlin Heidelberg.

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Section: Introductionmentioning

confidence: 99%

Sol-gel bioactive glass-ceramics Part I: Calcium phosphate silicate/wollastonite glass-ceramics

et al. 2009

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“…HAp alone has been used for non-load-bearing parts such as middle ear bones and for bioceramic film coating on Ti and Ti alloy medical implants [5][6][7]. To meet the requirements for the self-load bearing, HAp has been incorporated with other stiff mineral phases such as mullite [8,9], zirconia [10][11][12], alumina [13,14], wollastonite [15][16][17], leucite [18][19][20], and apatite [21,22]. Among these composite bioceramics, the combination of HAp and zirconia could be the most desirable for applications to hard tissues exposed under high friction and high impact due to the promising mechanical properties such as high fracture toughness and hardness as well as bioinertness of the zirconia component.…”

Section: Introductionmentioning

confidence: 99%

Preparation of hydroxyapatite/zirconia bioceramic nanocomposites for orthopaedic and dental prosthesis applications

Sung

Shin²,

Ryu

2007

Nanotechnology

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Homogeneous mixtures of hydroxyapatite (HAp) and yttria-stabilized zirconia (YSZ) nanoparticles were successfully synthesized using chemical co-precipitation and subsequent calcination. For the synthesis of HAp/YSZ nanopowder, the Ca/P atomic ratio was 1.73 to obtain high-content stoichiometric hydroxyapatite phase and to suppress β-tricalcium phosphate (β-TCP) formation. The agglomerated crystalline powders were milled using YSZ ball media to obtain well-separated nanoparticles. The final particle size of the HAp and YSZ was ∼50–70 and ∼15–30 nm, respectively. The crystallinity and morphological feature of the nanopowder was analysed using x-ray diffraction (XRD) and high-resolution transmission electron microscopy (HRTEM) analyses. The ball-milled nanopowder mixture was hot pressed at 1100 °C for 1 h under 20 MPa in vacuum atmosphere. The sintered HAp/YSZ nanocomposites exhibited approximately 99% of the theoretical density, due not only to the fine nanoscale of the particles, but also to the homogeneous distribution of the nanoparticle mixture. They also showed fine grain structures of the HAp phase due to the suppressed grain growth by YSZ particles. The nanocomposites showed improved mechanical properties, flexural strength of ∼155 MPa and fracture toughness of ∼2.1 MP m1/2, due to the YSZ contribution to the HAp matrix.

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“…In our previous work we have synthesized via solgel technique some bioactive ceramics, containing HA and other different phases such as: mullite [21][22][23], anorthite-gehlenite [24]; HA and other crystalline phases from the systems ZnO-SiO 2 , ZnO-Al 2 O 3 -SiO 2 , ZnO-CaO2SiO 2 [25]; HA and crystalline structures from the MgOSiO 2 and MgO-Al 2 O 3 -SiO 2 systems [26]. We have also shown that bioactive hybrid materials were synthesized in SiO 2 -P 2 O 5 -TiO 2 -CaO-PVA system.…”

Section: Introductionmentioning

confidence: 99%

Sol-gel bioactive glass-ceramics Part II: Glass-ceramics in the CaO-SiO2-P2O5-MgO system

et al. 2009

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Ceramics, with basic composition based on the CaO-SiO 2 -P 2 O 5 -MgO system with different Ca+ Mg/P+Si molar ratio (R), were prepared via polystep sol-gel technique. The structure of the obtained ceramic materials has been studied by XRD, FTIR spectroscopy, and SEM. X-ray diffraction showed the presence of akermanite and HA for the sample with R = 1.68 and Mg substituted β-TCP and silicocarnotite for the sample with R = 2.16, after thermal treatment at 1200°C/2 h. The obtained results are in good agreement with FTIR. In vitro test for bioactivity in static condition proved that the carbonate containing hydroxyapatite (CO 3 HA) can be formed on the surface of the synthesized samples. CO 3 HA consisted of both A-and B-type CO 3 2-ions. SEM micrographs depicted different forms of HA particles, precipitated on the surface after soaking in 1.5 simulated body fluid (SBF). Warsaw and Springer-Verlag Berlin Heidelberg. © Versita

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Untitled

Cited by 9 publications

References 4 publications

Sol-gel bioactive glass-ceramics Part I: Calcium phosphate silicate/wollastonite glass-ceramics

Sol-gel bioactive glass-ceramics Part I: Calcium phosphate silicate/wollastonite glass-ceramics

Preparation of hydroxyapatite/zirconia bioceramic nanocomposites for orthopaedic and dental prosthesis applications

Sol-gel bioactive glass-ceramics Part II: Glass-ceramics in the CaO-SiO2-P2O5-MgO system

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