Why might malocclusion lead to tooth decay?

• A. There is not enough space for teeth, leading to crowding and damage
• B. It increases saliva production
• C. It prevents plaque from forming
• D. It makes teeth grow faster

Answer: (A)

Malocclusion increases the risk of tooth decay mainly because crowding and misalignment create areas that are hard to clean. When teeth overlap or are crowded, plaque and food particles can get trapped in tight spaces. Brushing and flossing are less effective there, so bacteria stay longer and produce acids that demineralize enamel, leading to cavities. Over time, those retained plaque-rich zones become hotspots for decay.

Other choices don’t fit as well. More saliva would help wash away acids and protect teeth, not promote decay. Plaque can still form with malocclusion; it doesn’t prevent it and, in fact, the crowded areas tend to harbor more plaque. Teeth growing faster isn’t influenced by how teeth bite together, so it wouldn’t explain an increased decay risk.