Khan Aftab Ahmed, Alkhureif Abdulaziz Abdullah, Awaiyer Meshal Saeed, Bautista Leonel S J
Aftab Ahmed Khan, PhD, MSc, M.Bioeth, B.D.S., Researcher, Dental Health Department, College of Applied Medical Sciences, King Saud University, Riyadh, Saudi Arabia.
Abdul Aziz Abdullah Alkhureif, PhD, MSc, B.Dent Tech, Professor, Dental Health Department, College of Applied Medical Sciences, King Saud University, Riyadh, Saudi Arabia.
Pak J Med Sci. 2023 Nov-Dec;39(6):1631-1636. doi: 10.12669/pjms.39.6.7837.
This laboratory study determined the surface, mechanical and chemical properties of polymethyl methacrylate (PMMA) denture resin reinforced with micron-sized Gum Arabic (GA) powder in different weight ratios.
This laboratory study was conducted at the Dental Health Department of the College of Applied Medical Sciences, King Saud University, Riyadh, Saudi Arabia from November 2022 to February 2023. Three experimental denture resins were prepared by incorporating GA powder in heat-polymerized PMMA powder using different wt.% (5, 10, and 20 wt.%). While pristine PMMA served as the control group. A total of ten bar-shaped specimens with dimensions of 65 mm × 10 mm × 3.5 mm were prepared for each study group. The surface properties (micro CT and SEM evaluation), mechanical properties (Nanohardness, elastic modulus and flexural strength) and chemical properties (FTIR) were conducted. The data were statistically analyzed using the one-way analysis of variance and Tukey's post hoc tests (p<0.05).
The surface and bulk properties of experimental GA-reinforced PMMA resin materials deteriorated while the mechanical properties were also negatively altered using GA-based PMMA denture resin. A linear correlation was observed between weak mechanical properties and increasing wt.% of GA in denture resin.
The incorporation of GA powder in denture resin might not be a viable option. The surface and mechanical properties of experimental PMMA composites were adversely affected compared to the control group.
本实验室研究确定了不同重量比的微米级阿拉伯树胶（GA）粉末增强聚甲基丙烯酸甲酯（PMMA）义齿树脂的表面、机械和化学性能。
本实验室研究于2022年11月至2023年2月在沙特阿拉伯利雅得国王沙特大学应用医学科学学院牙科健康系进行。通过将GA粉末以不同重量百分比（5%、10%和20%重量）掺入热聚合的PMMA粉末中来制备三种实验性义齿树脂。而原始PMMA作为对照组。每个研究组共制备10个尺寸为65毫米×10毫米×3.5毫米的条形试样。进行了表面性能（微型CT和扫描电子显微镜评估）、机械性能（纳米硬度、弹性模量和弯曲强度）和化学性能（傅里叶变换红外光谱）测试。数据使用单因素方差分析和Tukey事后检验进行统计分析（p<0.05）。
使用基于GA的PMMA义齿树脂时，实验性GA增强PMMA树脂材料的表面和整体性能恶化，同时机械性能也发生了负面变化。在义齿树脂中，观察到机械性能减弱与GA重量百分比增加之间存在线性相关性。
在义齿树脂中掺入GA粉末可能不是一个可行的选择。与对照组相比，实验性PMMA复合材料的表面和机械性能受到了不利影响。
