Which of the following is NOT a characteristic of plaque?

Plaque is a sticky, clear, and colorless film composed primarily of bacteria that forms on teeth. One of the key characteristics of plaque is that it can lead to tooth decay and gum disease if not properly managed through good oral hygiene practices. Since plaque contains bacteria, it contributes to the development of harmful acids that can erode tooth enamel and ultimately cause cavities.

While plaque itself is a natural formation in the mouth, it can quickly become problematic if left untreated. Therefore, the notion that it is harmless if left untouched is incorrect, as neglecting to remove plaque can result in significant oral health issues. This highlights the necessity for regular brushing and flossing to control plaque accumulation and maintain good dental health.

A sticky film and the presence of bacteria are essential characteristics of plaque that contribute to its harmful effects, making the correct answer all the more evident.