prelims oral ana

Question 1

external parts of tooth

Answer 1

crown and root

Question 2

tissues of tooth

Answer 2

1. enamel
2. dentin
3. pulp
4. cementum

Question 3

the supporting structures of the teeth are collectively called _______

Answer 3

periodontium

Question 4

the periodontium consists of?

Answer 4

1. alveolar process
2. periodontal ligament
3. cementum
4. gingiva

Question 5

the portion of the maxillae or mandible in which the roots of the teeth are embedded and by which tooth roots are supported

Answer 5

alveolar process

Question 6

the alveolar process consists of?

Answer 6

1. outer cortical bone
2. spongy bone
3. lamina dura

Question 7

a compact layer of bone’s surface

Answer 7

outer cortical bone

Question 8

a thin, dense layer of bone that lines tooth sockets

Answer 8

lamina dura

Question 9

the less dense bone representing the alveolar process’ central mass

Answer 9

spongy bone

Question 10

a thin, fibrous ligament connecting a tooth to the lamina dura of the bony socket

Answer 10

periodontal ligament

Question 11

the specialized mucous membrane covering the alveolar processes and anchoring the necks of the teeh

Answer 11

gingiva

Question 12

function of gingiva

Answer 12

aids in the support of teeth; protects the alveolar process and periodontal ligament from bacterial invasion

Question 13

main parts of gingiva

Answer 13

free and attached

Question 14

gingiva that is not tightly bound to anything underneath it

Answer 14

free gingiva

Question 15

the gap/space between the tooth and free gingiva

Answer 15

gingival sulcus

Question 16

what joins the free gingiva to the surface of the tooth

Answer 16

epithelial attachment

Question 17

the portion of the free gingiva that fills the proximal spaces below the contact areas of the adjacent teeth

Answer 17

interdental papilla

Question 18

function of free gingiva

Answer 18

helps prevent food from packing between teeth

Question 19

part of the gingiva that is firmly fixed to underlying bone

Answer 19

attached gingiva

Question 20

formed during the development of the root

Answer 20

cementum

Question 21

function of cementum

Answer 21

serves as an area of attachment for periodontal ligament fibers

Question 22

most internal structure of the tooth; surrounded by dentin

Answer 22

pulp

Question 23

forms the main mass of the tooth

Answer 23

dentin

Question 24

dentin function

Answer 24

supports the enamel and acts as shock absorber when eating

Question 25

one of the primary anatomical divisions of a crown

Answer 25

lobe

Question 26

small, rounded projections of enamel from the incisal edges of newly erupted anterior teeth

Answer 26

mamelons

Question 27

a convex mount of enamel localized to the cervical one-third of the crown

Answer 27

cingulum

Question 28

a pointed or rounded elevation of enamel found on cuspids and on chewing surfaces of bicuspids and molars

Answer 28

cusps

Question 29

a linear, rounded border of enamel that forms the mesial and distal margins of teeth

Answer 29

marginal ridge

Question 30

the ridge of the enamel that extends from the cingulum to the cusp tip on the lingual surface of most cuspids

Answer 30

lingual ridge

Question 31

how many cusp ridge does each cusp have

Answer 31

4

Question 32

the sloping area found on the cusp ridges

Answer 32

cusp inclines

Question 33

unites the triangular ridge of the distobuccal cusp and the mesiolingual cusp

Answer 33

oblique ridge

Question 34

unites the buccal and lingual triangular ridge that crosses the surface of a posterior tooth transversely

Answer 34

transverse ridge

Question 35

# **** an irregular rounded concavity bound by the mesial and distal marginal ridge, cingulum, and incisal edge of the lingual surface of an incisor tooth

Answer 35

lingual fossa

Question 36

these are located adjacent to marginal ridges on the occlusal surfaces of posterior teeth

Answer 36

triangular fossa

Question 37

centrally located depression or concavity found on the occlusal surface of molars

Answer 37

central fossa

Question 38

an elongated valley or depression in the surface of a tooth formed by the inclines of adjacent cusps or ridges

Answer 38

sulcus

Question 39

minor, auxiliary groove that branches off from a much more prominent developmental groove

Answer 39

supplemental groove

Question 40

a linear fault that sometimes occurs in a developmental groove

Answer 40

fissure

Question 41

a small, pinpoint fault on the surface of a tooth

Answer 41

pit

Question 42

where are pits founds

Answer 42

usually at the end of a developmental groove; or at a place where two fissures intersect

Question 43

separates free gingiva from attached gingiva

Answer 43

gingival groove

Question 44

separates attached gingiva from alveolar mucosa

Answer 44

mucogingival junction