Document Type : Original Article
Authors
1
Lecturer, Department of Substitutive Dental Sciences, College of Dentistry, Imam Abdulrahman Bin Faisal University, P.O. Box 1982, Dammam 31411, Saudi Arabia
2
Lecturer, Department of Dental Biomaterials, College of Dentistry, Al-Azhar University, Assiut Branch, P.O. Box 11117, Egypt.
3
Assistant Professor, Department of Restorative Dental Sciences, College of Dentistry, Imam Abdulrahman Bin Faisal University, P.O. Box 1982, Dammam 31411, Saudi Arabia
4
Assistant Professor of Removable Prosthodontics, Faculty of Dental Medicine, Al-Azhar University, Assiut Branch. Egypt
Abstract
Purpose
: The purpose of this study was to evaluate the flexural strength of the acrylic denture base material modified with different concentrations of henna.
Materials and Methods:
Sixty heat polymerized acrylic resin specimens were fabricated in dimensions 65×10×2.5 mm according to ADA specifications #12. Specimens were divided according to henna concentrations into 6 groups. One control group without henna addition while the other five groups were processed by adding henna in concentrations 1%, 2.5%, 5%, 7.5% and 10% of acrylic powder. After processing, specimens were finished, polished, and stored in distilled water at 37 oC for 48±2 hours prior to testing. The three-point bending test was used to measure the flexural strength using universal testing machine. The morphology of the fractured specimens was studied under a scanning electron microscopy (SEM). The independent sample t-test was used and p ≤ 0.05 was considered statistically significant. Results: The flexural strength significantly decreased with henna addition to PMMA denture base material ( P<0.05), and this decrease was in proportional to henna concentrations.
Conclusion: The flexural strength of acrylic denture base material negatively was affected by henna addition.
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