背景技术由于玻璃离聚物水泥(GIC)的脆性和微孔性,变色影响其颜色稳定性。为了对抗这个,加入替代材料对于保持颜色稳定性至关重要。目的研究生物活性壳聚糖改性GIC的颜色稳定性和光泽,钛,氧化锆,和羟基磷灰石纳米颗粒在人工老化前后。材料和方法该研究在Saveetha研究中心进行,Saveetha牙科学院和医院,Saveetha医学和技术科学研究所,萨韦塔大学,位于钦奈,印度。绿色介导的壳聚糖,钛,氧化锆,使用一锅法合成技术合成了羟基磷灰石(Ch-Ti-Zr-HA)纳米颗粒。通过将获得的纳米颗粒(纳米复合材料)掺入GIC中制备了48个圆盘形样品,直径为5毫米,厚度为2毫米。试样以不同的浓度(3%,5%,和10%)指定为第一组,第二组,第三组,分别。第四组,作为控制,由没有任何修改的常规GIC组成。在准备之后,扫描电子显微镜(SEM)和能量色散X射线(EDX)显微分析证实了样品元素,并且在开始测试之前将样品浸没在蒸馏水中持续24小时的持续时间。随后,样品进行了人工老化(热循环),温度在5°C和55°C之间,总共30,000次循环,有30秒的停留时间。使用分光光度计和光泽计评估24小时后和热循环后的颜色变化和光泽特征。分别。使用AdobePhotoshop测量平均颜色变化参数(ΔE)。使用非配对t检验对获得的数据进行统计分析。结果热循环后观察到显著的颜色稳定性变化(P=0.001)。第2组(5%)表现出最小的ΔE差异(0.508±0.105),表明优异的颜色稳定性,而第4组(对照组)差异最大(1.15±0.187),表明稳定性较低。光泽测试证实了GIC的可抛光性,所有组之间存在显着差异。结论5%纳米粒子改性GIC比常规GIC具有更好的颜色稳定性和光泽。需要进一步的研究来分析洁齿剂和其他饮料的颜色稳定性和光泽。
Background Discoloration affects glass ionomer cement (GIC) color stability due to its brittle nature and microporosity. To counter this, incorporating alternative materials is essential for maintaining color stability. Aim This study aims to determine the color stability and gloss of GIC modified with bioactive chitosan, titanium, zirconia, and hydroxyapatite nanoparticles before and after artificial aging. Materials and methods The study was conducted at Saveetha Research Centre, Saveetha Dental College and Hospitals, Saveetha Institute of Medical and Technical Sciences, Saveetha University, located in Chennai, India. Green-mediated chitosan, titanium, zirconia, and hydroxyapatite (Ch-Ti-Zr-HA) nanoparticles were synthesized using the one-pot synthesis technique. Forty-eight disc-shaped specimens were prepared by incorporating the obtained nanoparticles (nanocomposite) into the GIC, with a diameter of 5 mm and thickness of 2 mm. The specimens were prepared in different concentrations (3%, 5%, and 10%) designated as group I, group II, and group III, respectively. Group IV, serving as the control, consisted of conventional GIC without any modifications. Following preparation, scanning electron microscopy (SEM) and energy-dispersive X-ray (EDX) microanalysis confirmed sample elements, and the specimens were submerged in distilled water for a duration of 24 hours prior to the commencement of testing. Subsequently, the specimens underwent artificial aging (thermocycling), between temperatures of 5°C and 55°C, for a total of 30,000 cycles, with a 30-second dwell time. Color change and gloss characteristics were assessed both after 24 hours and following thermocycling using a spectrophotometer and glossometer, respectively. The average color change parameter (ΔE) was measured using Adobe Photoshop. The data obtained were subjected to statistical analysis using an unpaired t-test. Results Significant color stability variations were observed post thermocycling (P = 0.001). Group 2 (5%) exhibited minimal delta E difference (0.508 ± 0.105), indicating superior color stability, while group 4 (control) had maximum difference (1.15 ± 0.187), indicating lower stability. Gloss tests confirmed GIC\'s polishability, where there were significant differences among all the groups. Conclusion It can be concluded that 5% nanoparticle-modified GIC has better color stability and gloss than conventional GIC. Further studies are needed to analyze the color stability and gloss through dentifrices and other beverages.