What is one common characteristic of plaque that leads to dental decay?

Plaque is a sticky, colorless film of bacteria that forms on the surfaces of teeth. This stickiness allows it to adhere firmly to the teeth, especially in areas that are hard to clean, such as between the teeth and along the gum line. Its adherence is significant because it creates an environment where bacteria can thrive. These bacteria metabolize sugars from food, producing acids that can demineralize tooth enamel and lead to dental decay (caries).

While plaque is indeed colorless and might occasionally contribute to an unpleasant odor depending on the types of bacteria present, its stickiness is the primary characteristic that enables it to accumulate and contribute to decay. Additionally, plaque can form on all teeth, not just the molars, making the claim that it appears only on molars inaccurate. The key factor that leads to dental decay is the ability of plaque to persist on the teeth due to its sticky nature.