2026-05-27T05:23:36Zhttps://riuma.uma.es/rest/oai/request

oai:riuma.uma.es:10630/302702026-02-03T11:16:25Zcom_10630_2254col_10630_37953

Orgaz, Felipe Dzika, A. Szycht, O. Amat, Daniel Barba, Flora Becerra-Ratia, José Santos-Ruiz, Leonor 2024-02-09T10:50:32Z 2024-02-09T10:50:32Z 2016-01-01 1742-7061 https://hdl.handle.net/10630/30270 10.1016/j.actbio.2015.10.006 Novel bioactive amorphous glass-glass composite scaffolds (ICIE16/BSG) with interconnected porosity have been developed. Hierarchically interconnected porous glass scaffolds were prepared from a mixture of two melt-derived glasses: a ICIE16 glass previously developed by Wu et al. (2011) to prevent crystallization, and a borosilicate glass of composition 73.48 SiO2-11.35 B2O3-15.15 Na2O (wt%). The resulting melt derived glass-glass composite scaffolds (ICIE16/BSG) were subject to surface functionalization to further improve its biological properties. This was performed by a nitridation process with hot gas N2/ammonia at 550 °C for 2 h, obtaining the ICIE16/BSG-NITRI. Evaluation of the degradation rate and the conversion to hydroxyapatite after immersion in simulated body fluid predicted a good biological activity of all the scaffolds, but particularly of the nitrided ones. In vitro evaluation of osteoblastic cells cultured onto the nitrided and non-nitrided scaffolds showed cell attachment, proliferation and differentiation on all scaffolds, but both proliferation and differentiation were improved in the nitrided ICIE16/BSG-NITRI. Statement of significance Biomaterials are often required in the clinic to stimulate bone repair. We have developed a novel bioglass (ICIE16/SBG-NITRI) that can be sintered into highly porous 3D scaffolds, and we have further improved its bioactivity by nitridation. ICIE16/SBG-NITRI was synthesized from a mixture of two melt-derived glasses through combined gel casting and foam replication techniques, followed by nitridation. To mimic bone, it presents high-interconnected porosity while being mechanically stable. Nitridation improved its reactivity and bioactivity facilitating its resorption and the deposition of apatite (bone-like mineral) on its surface and increasing its degradation rate. The nitrided surface also improved the bioglass' interaction with bone cells, which attached and differentiated better on ICIE16/SBG-NITRI. eng http://creativecommons.org/licenses/by-nc-nd/4.0/ open access Attribution-NonCommercial-NoDerivatives 4.0 Internacional Huesos - Regeneración Surface nitridation improves bone cell response to melt-derived bioactive silicate/borosilicate glass composite scaffolds journal article