Gharbi A, Ayadi S, Jouini N, Schoenstein F, Oudadess H, Feki H El, Cheikhrouhou-Koubaa W
Sfax University, Faculty of Sciences of Sfax, 3018, Sfax, Tunisia; University of Rennes 1, ISCR, UMR CNRS 6226, 35042, Rennes, France.
University of Paris 13, LSPM, CNRS-UPR 9001, 93430, Villetaneuse, France.
J Mech Behav Biomed Mater. 2022 Feb;126:104988. doi: 10.1016/j.jmbbm.2021.104988. Epub 2021 Nov 23.
Alkali borated bioactive glasses powders with compositions based on the SiO-NaO-CaO-PO-x BO system (0 < x < 20 wt%); have been consolidated at low temperature using Spark Plasma Sintering (SPS). Through SPS technique under 50 MPa, it was possible to achieve fully dense and completely amorphous borated glasses at temperatures as low as 420 °C. By increasing the sintering temperature up to 430 °C, the dense samples crystallized which is mostly achieved at higher temperatures. This study reveals that the mechanical properties of these new borated biomaterials are suitable to be used as a promising candidate for repairing defects in non-load-bearing bones as well as for coating on the metallic surface implants to improve the bioactivity process bone/implant. The pressure had a weak effect on the crystallization and densification of the glass compared to the temperature during the powder consolidation by SPS. Moreover, by increasing the boron content, the compressive strength and the elastic modulus of the elaborated glasses decreased for being close to those of the natural.
基于SiO-NaO-CaO-PO-x BO体系（0 < x < 20 wt%）的碱硼酸盐生物活性玻璃粉末，已通过放电等离子烧结（SPS）在低温下进行了固结。通过在50 MPa压力下的SPS技术，能够在低至420°C的温度下获得完全致密且完全非晶态的硼酸盐玻璃。将烧结温度提高到430°C时，致密样品发生了结晶，这通常在更高温度下才能实现。本研究表明，这些新型硼酸盐生物材料的力学性能适合用作修复非承重骨缺损的有前景的候选材料，以及用于金属表面植入物的涂层，以改善骨/植入物的生物活性过程。在通过SPS进行粉末固结过程中，与温度相比，压力对玻璃的结晶和致密化影响较弱。此外，随着硼含量的增加，所制备玻璃的抗压强度和弹性模量降低，接近天然材料的性能。
