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首页> 外文期刊>Journal of Functional Biomaterials >Incorporating Germanium Oxide into the Glass Phase of Novel Zinc/Magnesium-Based GPCs Designed for Bone Void Filling: Evaluating Their Physical and Mechanical Properties
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Incorporating Germanium Oxide into the Glass Phase of Novel Zinc/Magnesium-Based GPCs Designed for Bone Void Filling: Evaluating Their Physical and Mechanical Properties

机译：将氧化锗掺入用于骨空隙填充的新型锌/镁基GPC的玻璃相中：评估其物理和机械性能

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摘要

The structural role of Germanium (Ge), when substituting for Zinc (Zn) up to 8 mol % in the 0.48SiO 2 –0.12CaO–0.36ZnO–0.04MgO glass series, was investigated with respect to both the glass chemistry and also the properties of glass polyalkenoate cements (GPCs) manufactured from them. The Network connectivity (NC) of the glass was calculated to increase from 1.83 to 2.42 with the addition of GeO 2 (0–8 mol %). Differential thermal analysis (DTA) results confirmed an increase in the glass transition temperature ( T g ) of the glass series with GeO 2 content. X-ray photoelectron spectroscopy (XPS) showed an increase in the ratio of bridging oxygens (BO) to non-bridging oxygens (NBO) with the addition of GeO 2 , supporting the NC and DTA results. 29 Si magic angle spinning nuclear magnetic resonance spectroscopy ( 29 Si MAS-NMR) determined a chemical shift from ?80.3 to ?83.7 ppm as the GeO 2 concentration increased. These ionomeric glasses were subsequently used as the basic components in a series of GPCs by mixing them with aqueous polyacrylic acid (PAA). The handling properties of the GPCs resulting were evaluated with respect to the increasing concentration of GeO 2 in the glass phase. It was found that the working times of these GPCs increased from 3 to 15 min, while their setting times increased from 4 to 18 min, facilitating the injectability of the Zn/Mg-GPCs through a 16-gauge needle. These Ge-Zn/Mg-GPCs were found to be injectable up to 96% within 12 min. Zn/Mg-GPCs containing GeO 2 show promise as injectable cements for use in bone void filling.
机译：在玻璃化学以及玻璃的化学性质方面，研究了锗（Ge）在0.48SiO 2 –0.12CaO–0.36ZnO–0.04MgO玻璃系列中替代高达8 mol％的锌（Zn）时的结构作用。由它们制造的玻璃链烯酸酯水泥（GPC）的性能。通过添加GeO 2（0-8 mol％），玻璃的网络连通性（NC）从1.83增加到2.42。差热分析（​​DTA）结果证实了具有GeO 2含量的玻璃系列的玻璃化转变温度（T g）增加。 X射线光电子能谱（XPS）显示，在添加GeO 2的情况下，桥接氧（BO）与非桥接氧（NBO）的比例增加，支持了NC和DTA结果。 29 Si魔角旋转核磁共振波谱（29 Si MAS-NMR）确定了随着GeO 2浓度的增加，化学位移从δ80.3到δ83.7ppm。这些离聚物玻璃随后通过将它们与聚丙烯酸水溶液（PAA）混合而用作一系列GPC中的基本成分。相对于玻璃相中GeO 2浓度的增加评估了所得GPC的处理性能。结果发现，这些GPC的工作时间从3分钟增加到15分钟，而凝固时间从4分钟增加到18分钟，这有助于通过16号针头注射Zn / Mg-GPC。发现这些Ge-Zn / Mg-GPC在12分钟内最多可注射96％。含有GeO 2的Zn / Mg-GPCs有望作为用于骨空隙填充的注射用水泥。

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