HOSA Dental Terminology Practice

What is a cusp in dental terminology?

1. Fluid substance of cells

2. Major pointed or rounded eminence near the occlusal surface of a tooth

3. All teeth in the maxillary arch

4. A space in the dentin

The correct answer is: Major pointed or rounded eminence near the occlusal surface of a tooth

A cusp in dental terminology refers to a major pointed or rounded eminence found on the occlusal, or biting, surface of a tooth. This structure is vital in the function of a tooth since it plays a critical role in the process of chewing and grinding food. The cusps contribute to the overall morphology of the tooth, facilitating the occlusion, where teeth come together during biting and chewing. Each type of tooth may have different numbers and shapes of cusps. For example, molars typically have several cusps, while canines usually have one prominent cusp. The design and positioning of cusps are also significant in dental anatomy and can affect how teeth align and function together in the mouth. The other options do not accurately capture the definition of a cusp. The first option refers to a general cellular component, which is not specific to dental terminology. The third option mentions all teeth in the maxillary arch, lacking any focus on the specific structure of a cusp. Lastly, the fourth option describes a space in the dentin, which is unrelated to the concept of cusps. Therefore, defining a cusp as a major pointed or rounded eminence near the occlusal surface of a tooth provides the precise characterization needed in dental terminology.