HOSA Dental Terminology Practice

What is the primary composition of enamel?

1. Soft connective tissue

2. Hard calcified tissue covering dentin

3. Liquid substance found in the tooth

4. Elastic cartilage surrounding the gum

The correct answer is: Hard calcified tissue covering dentin

The primary composition of enamel is indeed hard calcified tissue covering dentin. Enamel is the outermost layer of a tooth and is known for being the hardest substance in the human body. Its main components are minerals, primarily hydroxyapatite, which is a crystalline structure that contributes to its hardness and strength. This hard structure serves to protect the underlying dentin, as well as the pulp chamber of the tooth, from mechanical forces and chemical acids that can lead to decay. The high mineral content provides enamel with its durability, making it essential for maintaining the integrity of the tooth throughout a person’s life. Unlike soft connective tissues or liquid substances, enamel is rigid and provides the necessary protection against wear and tear. The other options do not accurately describe enamel. Connective tissue is not found in enamel; instead, it is associated with the supportive structures in the mouth. A liquid substance is not relevant to the composition of enamel, as it is a solid layer. Elastic cartilage does not surround the gum either; rather, it is the gums that are primarily made up of soft tissues that support the teeth.