CDC Dental Terminology & Anatomy

Question 1

What is the primary function of the enamel in tooth anatomy?

Accepted Answer

To protect the tooth from damage and decay

Answer

Enamel is the hardest substance in the human body and forms the outermost protective layer of the tooth crown. Its primary function is to shield the underlying dentin and pulp from physical damage, extreme temperatures, and acid attacks caused by bacteria. This protection is crucial in preventing cavities and maintaining the structural integrity of the tooth.

Question 2

What is the function of the pulp inside a tooth?

Accepted Answer

To provide nutrients and sensory functions

Answer

The pulp is the innermost part of the tooth, containing blood vessels, nerves, and connective tissue. Its vital functions include supplying nutrients to the dentin, which is essential for tooth health, and providing sensory input, such as pain, temperature, and pressure sensations. This makes the pulp crucial for the tooth's vitality and its ability to respond to external stimuli.

Question 3

What is the significance of the periodontal ligament?

Accepted Answer

It attaches the tooth to the bone and permits slight movement

Answer

The periodontal ligament (PDL) is a specialized connective tissue that surrounds the root of the tooth and connects it to the alveolar bone of the jaw. Its crucial role is to firmly anchor the tooth in its socket while also acting as a shock absorber. This allows for slight physiological movement during chewing, which prevents direct impact damage to the bone and tooth.

Question 4

Which of the following is part of the dentin layer of the tooth?

Accepted Answer

It surrounds the pulp and provides strength

Answer

Dentin is the layer of tooth structure located immediately beneath the enamel and cementum, surrounding the pulp chamber and root canals. It forms the bulk of the tooth and provides significant strength and resilience to the overall structure. Dentin also contains microscopic tubules that transmit sensations and nutrients to the pulp, contributing to tooth vitality.

Question 5

What is the role of the gingiva in oral health?

Accepted Answer

To hold the tooth in place and protect the roots

Answer

The gingiva, commonly known as gums, is the soft tissue that surrounds the base of the teeth and covers the alveolar bone. Its primary role is to provide a protective seal around the teeth, holding them firmly in place and shielding the sensitive tooth roots and underlying bone from bacteria and physical trauma. Healthy gingiva is essential for preventing periodontal disease and maintaining overall oral health.

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CDC Dental Terminology & Anatomy