CH 8:Oral Histology

Question 1

___ ______ is the study of the structure and function of teeth and oral tissue.

Answer 1

Oral histology.

Question 2

The ______ ______ is the portion of the tooth that is covered with enamel. (remains constant throughout life regardless of the position of the gingiva

Answer 2

Anatomical crown.

Question 3

The _____ _____ is the portion of the tooth that is visible in the mouth. It varies in length during the cycle of the tooth depending on the level of gingiva.

Answer 3

Clinical crown.

Question 4

What is the difference between the anatomical crown and the clinical crown?

Answer 4

The anatomical crown stays the same regardless of the position of the gingiva where the clinical crown varies in length depending on the level of gingiva.

Question 5

Where is the CEJ?

Answer 5

The CEJ is located at the neck or cervix of the tooth where the enamel of the crown and the cementum or the root usually meet.

Question 6

______, which consist primarily of calcium, is the most abundant mineral component in enamel.

Answer 6

Hydroxyapatite.

Question 7

How does dentin transmit sensation of pain?

Answer 7

Through dentinal tubules that contain dentinal fiber which terminate in a branching network at the junction with the enamel or cementum, transmit pain stimuli which make it an excellent thermal conductor.

Question 8

What are the three types of dentin?

Answer 8

Primary dentin, secondary dentin, and tertiary dentin (reparative dentin).

Question 9

What are the two types of cementum?

Answer 9

Primary cementum, and secondary cementum.

Question 10

What types of tissue makes the pulp?

Answer 10

Blood vessels, nerves, connective tissue, tissue fluid.

Question 11

What cells form the intercellular substance of the pulp?

Answer 11

Fibroblast.

Question 12

What are the functions of osteoblasts and osteoclast?

Answer 12

Osteoblast are responsible for the formation of bone and osteoclast are responsible for resorption and remodeling of the bone.

Question 13

What are the functions of the periodontal ligaments?

Answer 13

The function is to support and hold the tooth firmly in normal relationship to surrounding soft and hard tissues.

Question 14

To which structures are the periodontal ligaments attached to?

Answer 14

The periodontal ligaments is attached to the cementum covering the root of the tooth to the alveolar bone of the socket wall.

Question 15

The ____ _____ almost continuously lines the oral cavity.

Answer 15

Oral mucosa.

Question 16

The oral mucosa is composed of _____ _____ epithelium that overlies connective tissue.

Answer 16

Stratified squamous epithelium.

Question 17

List the three main types of oral mucosa, and provide and example of each.

Answer 17

Lining mucosa: is softer, moist, stretch and compress, act as a cushion and cover the cheeks, vestibule, soft palate, lips (underneath is submucosa containing blood vessels and nerves)

Masticatory mucosa: is rubbery, dense, firm, and resilient includes attached gingiva, hard palate, dorsum of the tongue (is keratinized)

Specialized mucosa: on the top surface (dorsal surface) of the tongue which are present in the form of lingual papillae which are associated with sensations of taste.