Sintering and crystallisation of 45S5 Bioglass® powder

Bretcanu, Oana; Chatzistavrou, Xanthippi; Paraskevopoulos, K. M.; Conradt, Reinhard; Thompson, Ian D.; Boccaccını, Aldo R.

doi:10.1016/j.jeurceramsoc.2009.06.035

Cited by 225 publications

(197 citation statements)

References 23 publications

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“…There are bands in the 1100-1000 cm −1 region, associated with the Si-O-Si stretching vibrational modes; 950-900 cm −1 related to the Si-Onon-bridging oxygen band (NBO); 770-720 cm −1 , which are associated with large surface 3D silica structures (Si-O-Si, Si-OH, or SiO -); and 450-540 cm −1 , resulting from Si-O-Si bending. These bands become much sharper due to the crystallization process, and the absence of the Si-O-Si mode indicates a thick, well-established crystalline HCA layer [12,18,20]. As shown in Fig.…”

Section: Ea Aguilar-reyes Et Almentioning

confidence: 91%

“…During the debinding and sintering steps, the foam underwent shrinkage up to a diameter of 10 mm. According to Bretcanu et al [12], two distinct sintering steps can be distinguished in the heat treatment of 45S5 Bioglass®:afirst stage and a longer and more marked stage. The first densification step starts at 500°C and ends at 600°C.…”

Section: Ea Aguilar-reyes Et Al Ceramics International XXX (Xxxx) mentioning

confidence: 99%

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Processing and in vitro bioactivity of high-strength 45S5 glass-ceramic scaffolds for bone regeneration

Aguilar-Reyes

León‐Patiño

Villicaña-Molina

et al. 2017

Ceramics International

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Vous avez des questions? Nous pouvons vous aider. Pour communiquer directement avec un auteur, consultez la première page de la revue dans laquelle son article a été publié afin de trouver ses coordonnées. Si vous n'arrivez pas à les repérer, communiquez avec nous à PublicationsArchive-ArchivesPublications@nrc-cnrc.gc.ca. Questions? Contact the NRC Publications Archive team atPublicationsArchive-ArchivesPublications@nrc-cnrc.gc.ca. If you wish to email the authors directly, please see the first page of the publication for their contact information. NRC Publications Archive Archives des publications du CNRCThis publication could be one of several versions: author's original, accepted manuscript or the publisher's version. / La version de cette publication peut être l'une des suivantes : la version prépublication de l'auteur, la version acceptée du manuscrit ou la version de l'éditeur. NRC Publications Record / Notice d'Archives des publications de CNRC:http://nparc.cisti-icist.nrc-cnrc.gc.ca/eng/view/object/?id=90c0c36d-743d-4b59-8cd5-38ea2fcab383 http://nparc.cisti-icist.nrc-cnrc.gc.ca/fra/voir/objet/?id=90c0c36d-743d-4b59-8cd5-38ea2fcab383 ABSTRACTIn this paper, the compressive strength and in vitro bioactivity of sintered 45S5 bioactive glass scaffolds produced by powder technology and polymer foaming were investigated. The sintering temperature of scaffolds was 975°C. The characterization of scaffolds before immersion in SBF was performed by scanning electron microscopy (SEM) and microtomography (μCT). The scaffolds were also tested for compression, and their density and porosity were measured. After immersion, the samples were observed through SEM and analyzed using EDS, X-ray diffraction (XRD), and infrared spectroscopy (FT-IR). Mass variation was also estimated. The glass-ceramic scaffolds showed a 61.44 ± 3.13% interconnected porosity and an average compressive strength of 13.78 ± 2.43 MPa. They also showed the formation of a hydroxyapatite layer after seven days of immersion in SBF, demonstrating that partial crystallization during sintering did not suppress their bioactivity.

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Section: Ea Aguilar-reyes Et Almentioning

confidence: 91%

Section: Ea Aguilar-reyes Et Al Ceramics International XXX (Xxxx) mentioning

confidence: 99%

Processing and in vitro bioactivity of high-strength 45S5 glass-ceramic scaffolds for bone regeneration

Aguilar-Reyes

León‐Patiño

Villicaña-Molina

et al. 2017

Ceramics International

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“…As regards the crystalline phases of TT-CEL2, Na 2 Ca 2 Si 3 O 9 is the same crystalline phase that develops in 45S5 Bioglass ® when thermally-treated above 600 • C [42][43][44]-This commercial bioactive glass has been implanted since the early 1990s in millions of patients to regenerate bone [45]-And Ca 2 Mg(Si 2 O 7 ) was proved effective to promote new bone tissue formation in vivo, too [46,47]. FA, found in TT-FaGC, is a natural component of tooth enamel [48]; canasite is biocompatible, although its use for bone repair requires caution due to its tendency to fast resorption in vivo [49].…”

Section: Discussionmentioning

confidence: 88%

Production and Characterization of Glass-Ceramic Materials for Potential Use in Dental Applications: Thermal and Mechanical Properties, Microstructure, and In Vitro Bioactivity

Baino

Verné

2017

Applied Sciences

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Abstract:Multicomponent silicate glasses and their corresponding glass-ceramic derivatives were prepared and tested for potential applications in dentistry. The glasses were produced via a melting-quenching process, ground and sieved to obtain fine-grained powders that were pressed in the form of small cylinders and thermally treated to obtain sintered glass-ceramic samples. X-ray diffraction investigations were carried out on the materials before and after sintering to detect the presence of crystalline phases. Thermal analyses, mechanical characterizations (assessment of bending strength, Young's modulus, Vickers hardness, fracture toughness), and in vitro bioactivity tests in simulated body fluid were performed. On the basis of the acquired results, different potential applications in the dental field were discussed for the proposed glass-ceramics. The use of such materials can be suggested for either restorative dentistry or dental implantology, mainly depending on their peculiar bioactive and mechanical properties. At the end of the work, the feasibility of a novel full-ceramic bilayered implant was explored and discussed. This implant, comprising a highly bioactive layer expected to promote osteointegration and another one mimicking the features of tooth enamel, can have an interesting potential for whole tooth substitution.

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“…The unreacted L30Bg70 glass-ceramic showed bands at 1100-1000 cm -1 , 950-900 cm -1 and 443 cm -1 attributed to Si-O-Si, Si-O (NBO) 1,15 stretching, and Si-O-Si bending vibrations 1 , respectively, as well as a band at 619 cm -1 , all associated with sodium calcium silicate phase 16 . The presence of leucite was evident by the appearance of the band located at 720 cm -1 [17] , and a broadband at 500-560 cm -1 which coincides also with the contribution of PO bending vibrations of silicorhenanite 18 .…”

Section: Ftirmentioning

confidence: 99%

Bioactivity of leucite containing glass - ceramics using natural raw materials

Stábile

Volzone

2014

Mat. Res.

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Glass compositions were carefully prepared, using natural quartz and potassium feldspar as a part of the starting raw materials. The solids were prepared so as to have theoretical stoichiometric leucite and 45S5 Bioglass in different L/Bg weight ratios between 0.43-1.00. Novel bioactive glass-ceramics, containing leucite, sodium calcium silicate and silicorhenanite, confirmed by XRD and FTIR, were obtained. Bioactivity tests were carried out on powdered and sintered disks forms. The immersion time was up to 25 days. Apatite formation on powders was studied by FTIR, and XRD and SEM were used to study bioactivity on disks. The materials developed an apatite layer on their surfaces within 6 days of immersion in simulated body fluid. The glass-ceramic with L/Bg ratio= 0.43 presented an apatite layer on all its surface, not so for the samples with 0.66 and 1.00 ratios, on which such layer was peeled off in most part of their surfaces.

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Sintering and crystallisation of 45S5 Bioglass® powder

Cited by 225 publications

References 23 publications

Processing and in vitro bioactivity of high-strength 45S5 glass-ceramic scaffolds for bone regeneration

Processing and in vitro bioactivity of high-strength 45S5 glass-ceramic scaffolds for bone regeneration

Production and Characterization of Glass-Ceramic Materials for Potential Use in Dental Applications: Thermal and Mechanical Properties, Microstructure, and In Vitro Bioactivity

Bioactivity of leucite containing glass - ceramics using natural raw materials

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