Parts Of Tooth

Question 1

Anatomical crown (in pp)

Answer 1

The portion of the tooth that is covered with enamel

Question 2

Clinical crown (in pp)

Answer 2

The portion of the tooth that is visible in the mouth

Question 3

Cementoenamel junction (CEJ) (in pp)

Answer 3

The external line at neck or cervix of tooth where enamel of the crown and cementum of root meet

Question 4

Bifurcation

Answer 4

Division into 2 roots

Question 5

Trifurcation

Answer 5

Division into 3 roots

Question 6

Where is the apex? (In pp)

Answer 6

Is the tapered end of each root tip

Question 7

What is apical foramen? (In pp)

Answer 7

Small hole or opening at apex where blood and nerve supply enters/exits the tooth

Question 8

How many dental tissue is a tooth composed?

Answer 8

4: enamel, dentin, cementum, and pulp

Question 9

What is enamel? (In pp)

Answer 9

The hard covering of the tooth; used for crushing, grinding, and chewing food

Question 10

What is the dentin? (In pp)

Answer 10

Hard, dense, light yellow substance; makes up the main portion of the tooth structure; covered by enamel on the crown and cementum on the root

Question 11

Dentin produced 3 types of?

Answer 11

Primary dentin: formed before eruption and forms the bulk of the tooth

Secondary dentin: begins formation after eruption and continues at a slow rate throughout tooth life

Tertiary dentin: forms in response to irritation and appears as a localized deposit on the wall of the pulp chamber

Question 12

What’s cementum? (In pp)

Answer 12

Bonelike connective tissue that covers the root of the tooth; function is to anchor the tooth to the bony socket

Question 13

What’s the pulp? (In pp)

Answer 13

Made up of blood vessels and nerves; nerve supply of the pulp receives and transmits pain stimuli

Question 14

What is periodontium?

Answer 14

Supporting structure of the teeth; alveolar bone, periodontal ligament, cementum, and gingival unit

Question 15

What is alveolar bone? (In pp)

Answer 15

Extensions of bone of the maxilla and mandible that surrounds and supports the teeth and forms the tooth sockets

Question 16

What is osteoblasts? Osteoclasts?

Answer 16

Formation of the bone; resorption and remodeling of the bone

Question 17

What is periodontal ligament? (In pp)

Answer 17

Dense connective tissue that connects the tooth to the alveolar bone

supports and protect tooth socket and allows tooth to withstand pressure and forces of chewing

Question 18

Sensory function

Answer 18

Nerves that supply the sense of food

Question 19

Nutritive function

Answer 19

Ligaments receive their nutrients from the blood vessels that supply the tooth and alveolar bone

Question 20

Formative and resorptive functions

Answer 20

Fibroblasts if the periodontal ligament permit the continuous and rapid remodeling that is required for the tiger groups

Question 21

What are periodontal fiber groups?

Answer 21

Retain the tooth in the socket and to oppose lateral forces

Question 22

What is alveolar crest fibers?

Answer 22

Runs from the crest of the alveolar bone to the cementum in the region of the CEJ. Retain the tooth in the socket and to oppose lateral forces

Question 23

What is horizontal fibers?

Answer 23

Right angles to the long axis of the tooth from the cementum to the bone. Restrain lateral tooth movement

Question 24

What is oblique fiber?

Answer 24

Run in an upward direction from cementum to bone. Resist forces placed on the long axis of the tooth

Question 25

What’s apical fibers?

Answer 25

Radiate outward from the apical cementum and insert into the surrounding bone. Prevent the tooth from tipping, twisting; protects blood, lymph, and nerve supply

Question 26

What’s interradicular fibers?

Answer 26

Found only in multirooted teeth. Enhance resistance to tipping/twisting

Question 27

What’s gingival fiber groups?

Answer 27

Function to support marginal gingival tissues to maintain their relation to the tooth

Question 28

What’s dentogingival fibers?

Answer 28

Extend from the cervical cementum outward and upward into the laminate propria

Question 29

What’s circular fibers?

Answer 29

Form a band around the neck of the tooth and are interlaced by other groups of fibers in the unattached gingiva

Question 30

What’s alveologingival fibers?

Answer 30

Extend upwards from the alveolar crest into the lamina propria

Question 31

What’s dentoperiosteal fibers?

Answer 31

Extends facially and lingually from the cementum, pass over the crest of the alveolar bone and insert into the periosteum of the alveolar process. Function is to support the tooth and gingiva

Question 32

What’s gingival unit?

Answer 32

Oral mucosa is composed of stratified squamous epithelium that overlies connective tissue

Question 33

What are the three main types found in the oral cavity?

Answer 33

Lining, masticatory and specialized mucosa

Question 34

What’s the lining mucosa?

Answer 34

Softer texture, moist surface and the ability to stretch and be compressed and acts like a cushion for underlying structures; contains blood vessels and nerves

Question 35

What’s the masticatory mucosa?

Answer 35

Rubbery surface and resiliency; covers the attached gingiva, hard palate and upper surface of the tongue

Question 36

What’s specialized mucosa?

Answer 36

Presented in the form of lingual papillae (associated with sensations of taste)