Which of the following is a characteristic of essential oils?

Essential oils possess antimicrobial properties that allow them to alter the bacterial cell wall. This characteristic is significant in the context of oral health, as it helps control the growth of harmful bacteria associated with dental issues such as gingivitis and periodontitis. By disrupting the cell wall, essential oils enhance their effectiveness as agents against bacteria, contributing to their use in various dental hygiene products and protocols.

In contrast, while enamel growth is a desired outcome of certain dental treatments, essential oils do not promote enamel growth directly. Additionally, while some essential oils can be toxic if ingested in large quantities, they are not inherently poisonous when used according to standard practices in oral care. Essential oils do not neutralize fluoride; rather, they can complement fluoride treatments by providing additional antibacterial benefits without interfering with the fluoride's ability to strengthen enamel.