Anatomy - Chapter 8 (Obj 1.2)

Question 1

anatomical crown

Answer 1

is the whole crown of the tooth, whether it has erupted or not

Question 2

clinical crown

Answer 2

is part of the tooth that can be seen in the mouth

Question 3

Roots

Answer 3

The root portion or system of a tooth may be single or multiple with bifurcation or trifurcation, that is, the division of the root trunk into two or three roots

Question 4

Enamel

Answer 4

hard protective tissue that covers the crown of the tooth, hardest tooth tissue, colour varies with thickness, it is thickest at the tip

Question 5

Dentin

Answer 5

Makes up the bulk of the tooth, in both the crown and the root, “body of the tooth”, softer than enamel, harden then cementum or bone

Question 6

Cementum

Answer 6

covers root of teeth, light yellow, attaches tooth to bone, softer than dentin & enamel

Question 7

pulp

Answer 7

soft connective tissue containing nerves & blood tissues, surrounded by dentin

2 parts of pulp - chamber & canal
pulp horn is extension of chamber

Question 8

Crown

Answer 8

white part of tooth, covered with enamel

Question 9

CEJ - Cemento-enamel juntion

Answer 9

cementum meets enamel, also called cervical line or cervix

Question 10

root

Answer 10

part of the tooth covered in cementum, embedded in bone

Question 11

apex

Answer 11

terminal end of the root

Question 12

apical foramen

Answer 12

tiny opening in apex of the root for blood vessles and roots to enter

Question 13

apical

Answer 13

bottom of tooth (bottom of root)

Question 14

coronal

Answer 14

top of tooth (crown)

Question 15

radicular

Answer 15

having to do with tooth root, “crotch” of the root, the split

Question 16

Single rooted

Answer 16

all anterior teeth are single rooted

Question 17

bifurcated root

Answer 17

two separate roots, divided in 2 parts, typically lower (mandi) molars

Question 18

trifurcated roots

Answer 18

separated into 3 roots/parts, maximum anchor, typically upper (maxi) molars

Question 19

incisors

Answer 19

4 incisors in each arch, centrals & laterals (2 in each arch), single rooted, one sharp incisal edge, used to cut/incise food

Question 20

cuspids/canines

Answer 20

2 cuspids in each arch, next to lateral incisors, corner of arches, longest root, one pointed cusp, cornerstone of mouth, used for holding, grasping, tearing food

Question 21

premolars

Answer 21

4 premolars in each arch, 2 first premolars (1st next to cuspid, then 2nd, then 3rd), the maxi 1st premolar is bifurcated, the rest maxi (& all mandis) are single rooted, one prominent cusp with 1 or 2 less lingual cusp, used for holding food, grinding food

Question 22

molars

Answer 22

6 molars in each arch, 3 per quad, the 3rd molar is the most posterior (wisdom teeth), have bi or tri roots, broad chewing surfaces with 4 or 5 cusps, used for griding or chewing food

Question 23

occlusal surfaces

Answer 23

on the posterior teeth - the top - biting/chewing surface

Question 24

incisal surfaces

Answer 24

on the anterior teeth - the sharp edge

Question 25

lingual surfaces (or palatal)

Answer 25

surfaces that your tongue touches

Question 26

facial surfaces

Answer 26

touching your face

Question 27

buccal surfaces

Answer 27

touching your cheek

Question 28

labial surfaces

Answer 28

touching your lips

Question 29

proximal surfaces

Answer 29

mesial surfaces - toward the midline
distal surfaces - away from the midline

Question 30

interproximal area

Answer 30

space between teeth

Question 31

line angles

Answer 31

where 2 surfaces meet (nomenclature starts with proximal, then buccal or lingual surface, then angle/line angle)

Question 32

point angle

Answer 32

where 3 surfaces meet (incisal or occlusal always last in nomenclature)