INBDE (Integrated National Board Dental Examination) Practice Exam

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Enamel caries are caused by?

  1. Lactobacillus

  2. Streptococcus mutans

  3. Candida albicans

  4. Streptococcus sanguinis

The correct answer is: Streptococcus mutans

Enamel caries, also known as tooth decay or cavities, are primarily caused by the bacteria Streptococcus mutans. This type of bacteria thrives in the mouth, especially in the presence of sugars and starches from food, which it metabolizes into acids. These acids then attack the enamel of the teeth, leading to demineralization and eventually the formation of cavities. Lactobacillus and Candida albicans are also bacteria found in the oral cavity, but they are not the primary causative agents of enamel caries. Streptococcus sanguinis, on the other hand, is not typically associated with causing enamel caries.