Faculty of Stomatology, Meritorious Autonomous University of Puebla, 72410 Puebla, PUE, Mexico.
Innovation and Knowledge Transfer Directorate (DITCo), Meritorious Autonomous University of Puebla, 72570 Puebla, PUE, Mexico.
J Clin Pediatr Dent. 2024 Jul;48(4):160-167. doi: 10.22514/jocpd.2024.089. Epub 2024 Jul 3.
Glass ionomer cements (GICs) are the common materials employed in pediatric dentistry because of their specific applications in class I restorations and atraumatic restoration treatments (ART) of deciduous teeth in populations at high risk of caries. Studies show a limited clinical durability of these materials. Attempts have thus been made to incorporate nanoparticles (NPs) into the glass ionomer for improving resistance and make it like the tooth structure. An experimental study was conducted using the required samples dimensions and prepared based on the test being carried out on the three groups with or without the modification of light-cured glass ionomer. Samples were grouped as follows: control group (G1_C), 2% silver phosphate/hydroxyapatite NPs group (G2_SPH), and 2% titanium dioxide NPs group (G3_TiO). The physical tests regarding flexural strength (n = 10 per group), solubility (n = 10 per group), and radiopacity (n = 3 per group) were performed. The data were analyzed by Shapiro Wilks test, and one-way analysis of variance (one-way ANOVA), and multiple comparisons by Tukey's test. The -value of < 0.05 was considered significant. No statistically significant difference was observed between the control group (G1_C) and (G2_SPH) ( = 0.704) in the flexural strength test, however differences were found between G2_SPH and G3_TiO groups, ANOVA ( = 0.006); Tukey's test ( = 0.014). Pertaining to the solubility, G2_SPH obtained the lowest among the three groups, ANOVA ( = 0.010); Tukey's test ( = 0.009). The three study groups obtained an adequate radiopacity of >1 mm Al, respectively. The resin-modified glass ionomer cement (RMGIC) was further modified with 2% silver phosphate/hydroxyapatite NPs to improve the physical properties such as enhancing the solubility and sorption without compromising the flexural strength and radiopacity behavior of modified RMGIC. The incorporation of 2% titanium dioxide NPs did not improve the properties studied.
玻璃离子水门汀（GICs）因其在 I 类修复和高危龋人群中乳牙的无创伤修复治疗（ART）中的特殊应用，是儿科牙科中常用的材料。研究表明，这些材料的临床耐用性有限。因此，人们试图将纳米颗粒（NPs）掺入玻璃离子体中，以提高其抵抗力，并使其与牙齿结构相似。一项实验研究使用所需的样品尺寸进行，并根据对三组进行的测试进行准备，其中一组或不进行光固化玻璃离子体的改性。样品分为以下几组：对照组（G1_C）、2%磷酸银/羟基磷灰石 NPs 组（G2_SPH）和 2%二氧化钛 NPs 组（G3_TiO）。进行了有关弯曲强度（每组 n = 10）、溶解度（每组 n = 10）和射线不透性（每组 n = 3）的物理测试。数据通过 Shapiro Wilks 检验、单因素方差分析（one-way ANOVA）和 Tukey 检验进行多组比较。<0.05 的值被认为具有统计学意义。在弯曲强度测试中，对照组（G1_C）和（G2_SPH）之间没有观察到统计学上的显著差异（= 0.704），但在 G2_SPH 和 G3_TiO 组之间存在差异，方差分析（= 0.006）；Tukey 检验（= 0.014）。关于溶解度，G2_SPH 在三组中获得最低值，方差分析（= 0.010）；Tukey 检验（= 0.009）。三组研究组的射线不透性分别达到>1mmAl。进一步用 2%磷酸银/羟基磷灰石 NPs 改性树脂改性玻璃离子水门汀（RMGIC），以提高物理性能，如增强溶解度和吸附性，而不影响改性 RMGIC 的弯曲强度和射线不透性行为。掺入 2%二氧化钛 NPs 并不能改善所研究的性能。
