Borș Andrea Izabella
Faculty of Dentistry, George Emil Palade University of Medicine, Pharmacy, Science, and Technology of Targu Mures, 38 Gheorghe Marinescu Street, 540142 Târgu Mureș, Romania.
Dent J (Basel). 2025 Jun 18;13(6):272. doi: 10.3390/dj13060272.
This study investigates the chemical structure and molecular interactions in 3D-printed dental resins reinforced with varying concentrations of Yttria-Stabilized Zirconia (YSZ) nanoparticles, using Fourier-Transform Infrared Spectroscopy (FTIR) to assess the compatibility and bonding behavior at the molecular level. Three groups of 3D-printed methacrylate-based resin discs were fabricated: a control (0% YSZ), and experimental groups reinforced with 1% and 3% YSZ nanoparticles. Samples were produced using Digital Light Processing (DLP) technology and post-processed under standardized conditions. FTIR spectra were collected via ATR mode over a wavenumber range of 4000-600 cm. Spectral differences at key wavenumbers (1721.16, 1237.11, and 929.62 cm) were statistically analyzed using one-way ANOVA and Tukey's post hoc test. FTIR spectra showed no significant shifts in the ester carbonyl band at 1721.16 cm, suggesting the preservation of the core resin matrix. However, a statistically significant increase in absorbance at 1237.11 cm was observed in the 1% YSZ group ( = 0.034), indicating dipolar interaction. A distinct new peak at 929.62 cm, corresponding to Zr-O vibrations, emerged in the 3% YSZ group ( = 0.002), confirming successful nanoparticle integration. YSZ nanoparticles enhance specific molecular interactions within methacrylate-based dental resins without compromising structural integrity. These findings support the potential application of YSZ-reinforced 3D-printed resins in durable, biocompatible permanent dental restorations.
本研究使用傅里叶变换红外光谱（FTIR）研究了不同浓度氧化钇稳定氧化锆（YSZ）纳米颗粒增强的3D打印牙科树脂中的化学结构和分子相互作用，以评估分子水平上的相容性和键合行为。制备了三组3D打印的甲基丙烯酸酯基树脂圆盘：一组对照组（0% YSZ），以及分别用1%和3% YSZ纳米颗粒增强的实验组。样品采用数字光处理（DLP）技术制作，并在标准化条件下进行后处理。通过衰减全反射（ATR）模式在4000 - 600 cm的波数范围内收集FTIR光谱。使用单因素方差分析和Tukey事后检验对关键波数（1721.16、1237.11和929.62 cm）处的光谱差异进行统计分析。FTIR光谱显示，在1721.16 cm处的酯羰基带没有明显位移，表明核心树脂基体得以保留。然而，在1% YSZ组中，观察到1237.11 cm处的吸光度有统计学意义的增加（P = 0.034），表明存在偶极相互作用。在3% YSZ组中出现了一个对应于Zr - O振动的929.62 cm处的明显新峰（P = 0.002），证实了纳米颗粒的成功整合。YSZ纳米颗粒增强了甲基丙烯酸酯基牙科树脂内的特定分子相互作用，而不损害结构完整性。这些发现支持了YSZ增强的3D打印树脂在耐用、生物相容性永久牙科修复中的潜在应用。
