Nawasrah Amal, Gad Mohammed M, El Zayat Mai
Department of Substitutive Dental Sciences, College of Dentistry, Imam Abdulrahman Bin Faisal University, Dammam Kingdom of Saudi Arabia.
Department of Substitutive Dental Sciences, College of Dentistry, Imam Abdulrahman Bin Faisal University, Dammam Kingdom of Saudi Arabia, Phone: +966592502080, e-mail:
J Contemp Dent Pract. 2018 Jun 1;19(6):732-738.
This study aimed to evaluate the effect of the addition of various henna-which can have antifungal properties-on the surface roughness and hardness of polymethylmethacrylate (PMMA) denture base material.
A total of 99 rectangular-shaped (10 × 20 × 3 mm) specimens were prepared from heat-cured acrylic resin and divided into one control group without the addition of henna and five test groups, which were prepared by adding Yamanihenna powder to polymer at concentrations of 1, 2.5, 5, 7.5, and 10 wt%. The polymer was added to the monomer, mixed, packed, and processed using the conventional water bath method. After processing, specimens were finished and polished, then kept in distilled water for 48 ± 2 hours. A profilom-eter and Vickers hardness tester were used to measure surface roughness and hardness respectively. Statistical data analysis was conducted via Statistical Package for the Social Sciences (SPSS) version 20.0 (IBM, USA). The independent sample t-test was used and p ≤ 0.05 was considered statistically significant.
The addition of henna at varying concentrations significantly increased the surface roughness values (p ≤ 0.01) while decreasing hardness (p ≤ 0.0001). The most favorable addition value was 1% henna between all henna groups.
The addition of henna to the acrylic resin may negatively affect the surface properties of PMMA acrylic denture base.
Antimicrobial denture with minimum deterioration effects on its physical properties could be achieved with henna addition to denture base material in low concentration. However, 1% henna showed the best results between the henna groups as regards roughness and hardness values.
本研究旨在评估添加具有抗真菌特性的各种指甲花对聚甲基丙烯酸甲酯（PMMA）义齿基托材料表面粗糙度和硬度的影响。
用热固化丙烯酸树脂制备99个矩形（10×20×3mm）试件，分为不添加指甲花的一个对照组和五个试验组，试验组通过以1、2.5、5、7.5和10wt%的浓度向聚合物中添加也门指甲花粉制备。将聚合物添加到单体中，混合、装盒并采用传统水浴法进行加工。加工后，对试件进行修整和抛光，然后在蒸馏水中保存48±2小时。分别用轮廓仪和维氏硬度计测量表面粗糙度和硬度。通过社会科学统计软件包（SPSS）20.0版（美国IBM公司）进行统计数据分析。采用独立样本t检验，p≤0.05被认为具有统计学意义。
不同浓度的指甲花添加均显著增加了表面粗糙度值（p≤0.01），同时降低了硬度（p≤（0.0001）。在所有指甲花组中，最适宜的添加量为1%的指甲花。
向丙烯酸树脂中添加指甲花可能会对PMMA丙烯酸义齿基托的表面性能产生负面影响。
在义齿基托材料中添加低浓度指甲花可制成对其物理性能影响最小的抗菌义齿。然而，就粗糙度和硬度值而言，1%的指甲花在指甲花组中显示出最佳效果。
