Evaluation of Roughness Surface of Heat Acrylic Resin Immersed in Antimicrobial Natural Products

Objectives: Several natural products have been shown to present antimicrobial activity on the oral pathogens, including inhibition of fungal biofilm formation on the acrylic resin. Thus, there is a possibility that herbal medicines may have substantial participation in the treatment and/or prevention of denture stomatitis, strongly related to the adhesion of Candida albicans on the internal surface of removable dentures, mainly superior. However, it is important that these natural products simultaneously do not cause harmful effects on the physical properties of resin, after many applications. Thus, the surface roughness of acrylic resin specimens treated with three antimicrobial natural products was analyzed.
Methods: Thirty specimens (30X5X5mm) of polymerized acrylic resin were fabricated, polished and tested for initial verification of roughness (Time 0 – T0). Then, the specimens were individually immersed in natural products: 20% propolis alcoholic extract, Punica granatum Linné gel or Uncaria tomentosa gel (Imuno- Max Gel) for 14 days, and roughness surface was measured again (T1). The variation in roughness was evaluated by the paired t-test and ANOVA followed by Tukey test.
Results: In vitro, these products did not significantly change the roughness of the acrylic resin tested, except for 20% propolis, which presented in T1 a statistically significant increase compared to the respective T0, and to other products.
Conclusions: The results suggest that P. granatum Linné and Uncaria tomentosa gels can be a potential treatment approach for denture stomatitis without promoting changes in surface roughness of resin.