National Dental Assisting Examining Board (NDAEB) Practice Exam

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What is an important characteristic of incisors?

  1. They have two roots

  2. They are flat and sharp-edged

  3. They are large and rounded

  4. They are located at the back of the mouth

The correct answer is: They are flat and sharp-edged

Incisors are designed for cutting food, and their morphology reflects this function. They are characterized by their flat, sharp edges, which facilitate the slicing of food items. This distinct shape allows for effective biting and shearing, making them essential for the initial stages of chewing. Other features of incisors include having a single root and being located in the front part of the mouth, which distinguishes them from other types of teeth, such as molars that are broader and more rounded, serving a different purpose in grinding food. Therefore, the flat and sharp-edged nature of incisors aligns perfectly with their functional role in the oral cavity.

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