Dental Assistant Practice Exam

What is above the gum line and is covered in enamel?

1. Clinical crown

2. Apical foramen

3. Anatomical crown

4. Root tip

The correct answer is: Clinical crown

The clinical crown refers to the portion of the tooth that is visible above the gum line and is covered in enamel. This part of the tooth is crucial for aesthetic appearance and functional use in biting and chewing. The enamel layer provides a hard, protective surface that resists wear and protects the underlying dentin and pulp from bacteria and decay. In contrast, the anatomical crown includes both the visible portion above the gum line and the part of the tooth that is covered by the gums. This distinction is important because the anatomical crown can sometimes be larger than the clinical crown, depending on the health of the gums. The apical foramen is a small opening at the tip of the root through which nerves and blood vessels enter the tooth, playing a role in the tooth's vitality but not related to the visible part above the gum. The root tip denotes the end of the root structure that anchors the tooth in the jawbone, which is entirely below the gum line.