The EOs of E. globulus and E. urograndis are potential anticariogenics that inhibit biofilm and planktonic cells of S. mutans. However, E. globulus showed the best results, which can be explained by it having the largest concentration of 1,8-cineole. However, the MIC was significantly reduced when EOs were used in combination, which proves synergism between the essential oils of E. globulus and E. urograndis.
Biodegradable films prepared with these EOs successfully presented good visual characteristics and excellent activity against S. mutans.
These essential oils are a natural and environmentally benign alternative for the control of dental plaque that requires low concentrations and a short time of contact to exert bioactivity. The results of this study demonstrate the importance of plant extracts as an alternative therapy in dental practice.