HOSA Dental Terminology Practice

What does the cusp of Carabelli represent?

1. A major pointed eminence on the occlusal surface

2. The fifth lobe of a maxillary first molar

3. The fluid substance of cellular components

4. The action of chewing

The correct answer is: The fifth lobe of a maxillary first molar

The cusp of Carabelli is recognized as the fifth lobe specifically associated with the maxillary first molar. This anatomical feature is an important aspect of dental morphology, often present on the lingual aspect of the tooth. Understanding the cusp of Carabelli aids in identifying variations in tooth structure, especially in maxillary molars, which can have clinical implications in dental practice, including restorative options and orthodontic considerations. In contrast, the other options do not accurately define the cusp of Carabelli; for example, a major pointed eminence on the occlusal surface refers to the main cusps of teeth and does not specifically highlight the unique fifth lobe. The fluid substance of cellular components relates more to biological terminology rather than dental anatomy, and the action of chewing describes a physiological process rather than an anatomical feature. Therefore, recognizing the cusp of Carabelli as the fifth lobe helps in emphasizing its significance in understanding human dentition.