Laboratory of Industrial Chemistry, National Engineering School of Sfax, Box 1173, 3038 Sfax, University of Sfax, Tunisia.
Laboratory of Industrial Chemistry, National Engineering School of Sfax, Box 1173, 3038 Sfax, University of Sfax, Tunisia.
Mater Sci Eng C Mater Biol Appl. 2017 Feb 1;71:279-288. doi: 10.1016/j.msec.2016.09.058. Epub 2016 Sep 30.
In this work, a calcium-phosphate glass-ceramics was successfully obtained by heat treatment of a mixture of 26.52 in wt.% of fluorapatite (Fap) and 73.48 in wt.% of 77S (77 SiO14 CaO9 PO in wt.%) gel. The calcium phosphate-glass-ceramics was prepared by sol-gel process with tetraethyl orthosilicate (TEOS), triethyl phosphate (TEP), calcium nitrate and fluorapatite. The synthesized powders were characterized by some commonly used tools such as X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), P magic angle spinning nuclear magnetic resonance (MAS-NMR), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), and thin-film X-ray diffraction (TF-XRD). The obtained results seemed to confirm the nucleation and growth of hydroxyapatite (Hap) nano-phase in the glass. Moreover, an in-vitro evaluation of the glass-ceramic was performed. In addition, to assess its bioactive capacity, it was soaked in simulated body fluid (SBF) at different time intervals. The SEM, EDS and TF-XRD analyses showed the deposition of hydroxyapatite on the surface of the specimens after three days of immersion in SBF solution. The mechanical properties of the obtained material such as rupture strength, Vickers hardness and elastic modulus were measured. In addition, the friction coefficient of calcium phosphate-glass-ceramics was tested. The values of the composite of rupture strength (24MPa), Vickers hardness (214Hv), Young's modulus (52.3GPa), shear modulus (19GPa) and friction coefficient (0.327) were obtained. This glass-ceramics can have useful applications in dental prostheses. Indeed, this material may have promising applications for implants because of its content of fluorine, the effective protector against dental caries.
在这项工作中，通过热处理由氟磷灰石（Fap）26.52wt％和 77S（77SiO14CaO9POwt％）凝胶 73.48wt％的混合物成功获得了钙磷酸盐玻璃陶瓷。通过溶胶-凝胶工艺，使用四乙氧基硅烷（TEOS）、三乙磷酸酯（TEP）、硝酸钙和氟磷灰石制备了磷酸钙玻璃陶瓷。通过 X 射线衍射（XRD）、傅里叶变换红外光谱（FTIR）、P 魔角旋转核磁共振（MAS-NMR）、扫描电子显微镜（SEM）、能谱（EDS）和薄膜 X 射线衍射（TF-XRD）等常用工具对合成的粉末进行了表征。获得的结果似乎证实了玻璃中羟磷灰石（Hap）纳米相的成核和生长。此外，还对玻璃陶瓷进行了体外评价。此外，为了评估其生物活性能力，将其在不同时间间隔浸泡在模拟体液（SBF）中。SEM、EDS 和 TF-XRD 分析表明，在 SBF 溶液中浸泡三天后，在样品表面沉积了羟磷灰石。测量了获得的材料的机械性能，例如断裂强度、维氏硬度和弹性模量。此外，还测试了钙磷酸盐玻璃陶瓷的摩擦系数。获得的复合材料的断裂强度（24MPa）、维氏硬度（214Hv）、杨氏模量（52.3GPa）、剪切模量（19GPa）和摩擦系数（0.327）的值。这种玻璃陶瓷在牙科修复体中可能具有有用的应用。实际上，由于其氟含量，这种材料可能在植入物方面具有广阔的应用前景，因为氟是有效的龋齿保护剂。
