فهرست نشریات علمی دسترسی آزاد ایران

Long-term acrylic soft denture lining materials have many advantages in prosthetic dentistry, but the nature of these materials makes them subject to different problems. One of these widely spread problems was candida albicans. Because of the difficulty in killing fungal cells and the deep penetration of fungi inside the soft denture lining material, researchers tried to find other ways to treat this problem. They depended on nanoparticles to improve the antifungal and mechanical properties of the soft denture lining material. In this study Boron nitride nano particles were added to acrylic soft liner in attempt to decrease Candida albicans adherence and evaluate its effect on other properties which are: Surface roughness and surface hardness. According to the results of the pilot study, we chose 1.5% and 2% by weight of BN NPs as the most suitable percentages added to the soft lining material.Main: 90 specimens were prepared, 30 specimens for each test, which are the candida albicance adherence test, roughness test, and hardness test. Boron Nitride Nanoparticles were spread through monomer by sonication using a sonicator probe, then the soft liner powder was added to the sonicated monomer with nanoparticles, and the specimens were taken to investigate Boron Nitride Nanoparticles efficiency as antifungal activity and as a mechanical property improver. When boron nitride nanoparticles were added to the soft lining material, the adhesion of Candida albicans was high significantly reduced, without significantly increasing the surface roughness. According to the results of the hardness test, the inclusion of BN NPs was high significantly increased the soft liner’s hardness. The antifungal activities of soft lining materials were greatly enhanced due to BN NPs powder’s potent antifungal action against C. albicans. There was no significant increase in surface roughness, and hardness was highly increased after incorporation of BN NPs into heat-cured soft denture lining material.