Question 1

What is the hardest substance in the human body, forming the outer layer of the tooth crown?

Accepted Answer

Enamel is the hardest substance in the human body. It covers the anatomical crown and is composed of approximately 96% inorganic material (hydroxyapatite crystals).

Question 2

What tooth structure makes up the bulk of the tooth and extends from the crown to the root?

Accepted Answer

Dentin makes up the bulk of the tooth. It is less hard than enamel, contains dentinal tubules, and is sensitive because it surrounds the pulp chamber.

Question 3

What is the name of the specialized connective tissue that attaches the tooth to the alveolar bone?

Accepted Answer

The periodontal ligament (PDL) attaches the tooth to the alveolar bone. It is composed of collagen fibers and acts as a shock absorber during chewing.

Question 4

What covers the root surface of a tooth and serves as an attachment point for the periodontal ligament fibers?

Accepted Answer

Cementum covers the root surface of the tooth. It is a calcified tissue that anchors Sharpey's fibers of the periodontal ligament to the root.

Question 5

What term describes the junction where enamel and cementum meet on the tooth?

Accepted Answer

The cementoenamel junction (CEJ), also called the cervical line, is where enamel and cementum meet. It marks the boundary between the anatomical crown and the root.

Dental Anatomy for DANB Certification

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