Abdul-Baqi Hikmat J, Safi Ihab N, Nima Ahmad Ali, Fatalla Abdalbseet A
Department of Prosthodontics, College of Dentistry, University of Baghdad, Baghdad, Iraq.
J Int Soc Prev Community Dent. 2022 Jan 29;12(1):93-99. doi: 10.4103/jispcd.JISPCD_274_21. eCollection 2022 Jan-Feb.
This study was conducted to assess the effect of the addition of yttrium oxide (YO) nanoparticles on the tensile bond strength, tear strength, shore A hardness, and surface roughness of soft-denture lining material.
YO NPs with 1.5 and 2 wt.% were added into acrylic-based heat-cured soft-denture liner. A total of 120 specimens were prepared and divided into four groups according to the test to be performed (tensile bond strength, tear strength, surface hardness, and surface roughness).
There was a highly significant increase in tensile bond strength between the soft liner and the acrylic denture base, tear strength, and hardness at both concentrations as compared to the control group, whereas there was a nonsignificant difference between 1.5wt% of YO nanoparticles and the control group, and between 1.5wt% and 2wt% of YO nanoparticles. But there was a significant difference between 2wt% of YO nanoparticles and the control group.
The YO nanoparticles impregnated in soft-lining materials increased the mechanical properties of both tensile bonding strength and tear strength. Also, there was a significant increase in hardness but there was no change in surface roughness of acrylic-based denture soft-lining materials.
本研究旨在评估添加氧化钇（YO）纳米颗粒对软质义齿衬里材料的拉伸粘结强度、撕裂强度、邵氏 A 硬度和表面粗糙度的影响。
将 1.5 wt.% 和 2 wt.% 的 YO 纳米颗粒添加到丙烯酸基热固化软质义齿衬里材料中。总共制备了 120 个样本，并根据要进行的测试（拉伸粘结强度、撕裂强度、表面硬度和表面粗糙度）分为四组。
与对照组相比，两种浓度下软质衬里与丙烯酸义齿基托之间的拉伸粘结强度、撕裂强度和硬度均有极显著提高，而 1.5 wt.% 的 YO 纳米颗粒与对照组之间、1.5 wt.% 和 2 wt.% 的 YO 纳米颗粒之间无显著差异。但 2 wt.% 的 YO 纳米颗粒与对照组之间存在显著差异。
浸渍在软质衬里材料中的 YO 纳米颗粒提高了拉伸粘结强度和撕裂强度的力学性能。此外，丙烯酸基义齿软质衬里材料的硬度显著增加，但表面粗糙度没有变化。
