Aim: Incomplete polymerization of a resin material used for dental restoration affects the properties of the restoration. We evaluated the structural and mechanical properties of three different colored compomers cured with three different LED units to observe the characteristic changes occurring in different matches. Methods: Polytetrafluoroethylene molds (5 mm in diameter and 2 mm in thickness) were used to prepare disk-shaped sample specimens. Nine sample groups (each of five specimens) were prepared, three each of different compomer resin colors (gold, berry, and silver). Samples were cured using three different LED units (Optima, VALO, and Demi Ultra), according to the manufacturers’ instructions. Microstructural properties of samples were characterized by determining the degree of curing using Fourier-transform infrared spectroscopy and by analyzing sample morphology under a scanning electron microscope. The Vickers hardness, compressive strength, and elastic modulus of the samples were measured to investigate their mechanical properties. Results: The degrees of curing decreased in the order of silver > berry > gold for all curing units. Conversely, gold compomers exhibited poorer mechanical values than the berry and silver counterparts. The Optima 10 unit yielded slightly higher degrees of curing than the other devices, followed by Demi Ultra and VALO light-curing units, respectively. Conclusion: The resin color affected the structural and mechanical properties of the compomers, possibly as a result of the complex interactions and relationships between the irradiation light and resin material, such as light absorbance and reflectance; thus, depending on the color as well as the curing protocol.

中文翻译：

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不同LED单元固化的彩色复合体的聚合特性

目的：用于牙科修复的树脂材料的不完全聚合会影响修复体的性能。我们评估了用三种不同 LED 单元固化的三种不同颜色复合体的结构和机械性能，以观察在不同匹配中发生的特征变化。方法：采用聚四氟乙烯模具（直径5mm，厚度2mm）制备圆盘状试样。制备了九组样品（每组五个样品），三种不同的复合体树脂颜色（金色、浆果色和银色）。根据制造商的说明，使用三种不同的 LED 装置（Optima、VALO 和 Demi Ultra）对样品进行固化。通过使用傅立叶变换红外光谱确定固化程度和通过在扫描电子显微镜下分析样品形态来表征样品的微观结构特性。测量样品的维氏硬度、压缩强度和弹性模量以研究它们的机械性能。结果：所有固化单元的固化程度按银>浆果>金的顺序降低。相反，金复合体的机械性能比浆果和银复合体差。Optima 10 装置的固化程度略高于其他装置，其次是 Demi Ultra 和 VALO 光固化装置。结论：树脂颜色影响复合体的结构和力学性能，可能是由于照射光与树脂材料之间复杂的相互作用和关系，如吸光率和反射率；因此，取决于颜色以及固化协议。