Dental Admissions Test (DAT) Practice Test

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Prepare for the Dental Admissions Test (DAT) with our comprehensive practice test. Study effectively with flashcards and multiple-choice questions, each with detailed hints and explanations. Get ready to ace your exam and secure your future in dentistry!

Practice this question and more.

What is tooth sensitivity commonly caused by?

Excessive fluoride exposure
Exposed dentin or enamel erosion
Tooth decay
Gum disease

The correct answer is: Exposed dentin or enamel erosion

Tooth sensitivity is commonly caused by exposed dentin or enamel erosion. When the protective layers of the teeth, such as the enamel, wear down or get damaged, the underlying dentin becomes exposed. Dentin contains tiny tubules that lead to nerve endings, so when it is exposed, stimuli such as hot or cold temperatures, sweet or acidic foods, and even touch can trigger discomfort or pain. Enamel erosion can happen due to various reasons, including acidic foods and beverages, grinding the teeth, or even certain medical conditions that cause acid exposure in the mouth. Likewise, if the gums recede as a result of gum disease or brushing too hard, it can also result in exposure of the root surfaces of the teeth, leading to increased sensitivity. Thus, the exposure of dentin due to enamel erosion or gum recession is a primary reason individuals experience tooth sensitivity.