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Question 1

facial surface

Answer 1

towards the face (resting against or next to the cheeks or lips)

Question 2

Is facial used to define anterior or posterior teeth?

Answer 2

both

Question 3

buccal surface

Answer 3

for posterior teeth only, located next to the cheek

Question 4

labial surface

Answer 4

for anterior teeth only, located next to lips

Question 5

“bucc” is used to refer a relationship or proximity to?

Answer 5

the cheek

Question 6

lingual surface

Answer 6

surface of tooth nearest the tongue

Question 7

occlusal surface

Answer 7

is the chewing surface of a POSTERIOR tooth

Question 8

Incisal edge or incisal ridge

Answer 8

cutting surface on ANTERIOR teeth

Question 9

proximal surfaces

Answer 9

sides of a tooth next to an adjacent tooth

Question 10

Can anterior teeth have occlusal surfaces?

Answer 10

No. They have cutting surfaces called incisal ridge

Question 11

What are the two types of proximal surfaces?

Answer 11

mesial and distal

Question 12

What teeth do NOT have adjacent teeth on both sides?

Answer 12

3rd molars. No teeth on their distal surface

Question 13

What teeth have their mesial surfaces facing each other?

Answer 13

central incisors

Question 14

self-cleaning of mouth means?

Answer 14

able to be cleaned by rubbing action of teeth, cheeks, lips, or tongue

Question 15

What surface is NOT easily self-cleaned by the mouth?

Answer 15

proximal surfaces between teeth

Question 16

The junction line where two tooth surfaces meet is called?

Answer 16

line angle

Question 17

How do you name a line angle?

Answer 17

combine the names of the two touching surfaces but change the “al” ending of the first surface to a “o”
Ex: mesio-occlusal, distofacial

Question 18

What is the guideline to follow when naming line angles?

Answer 18

1st- mesial, distal, facial (buccal or labial), lingual and lastly occlusal or incisal

Question 19

What are point angles?

Answer 19

junctions of 3 tooth surfaces at a point

Ex: mesiobucco-occlusal

Question 20

How do you describe the dimensions of a tooth?

Answer 20

by combining terms to denote the direction over which a dimension is taken

Question 21

What surfaces would you look at to determine the mesiodistal dimension of a molar?

Answer 21

buccal, lingual, occlusal surfaces

Question 22

What lines do you use to divide a tooth into thirds?

Answer 22

1) horizontal= cervical, middle, occlusal

2) vertical= mesial, middle, distal (or facial, middle, lingual)

Question 23

What is a root-to-crown ratio?

Answer 23

the root length divided by crown length

Question 24

Why are root to crown ratios normally greater than 1.0?

Answer 24

because almost all roots are longer than their crowns
Ex: incisor root 13mm and incisor crown 11.2 = 13/11.2 = 1.16 mm (root not much longer)
Ex: canine root 16.5 and crown 10.6 =16.5/10.6 = 1.56 mm (root much longer)

Question 25

Clinical importance of long roots?

Answer 25

a tooth with a longer root is more stable to attach or support false teeth