page 652-661

Question 1

Most unique primary or permanent tooth.

■ Most difficult primary tooth to restore.

Answer 1

mand 1st molar

Question 2

Occlusal shape is rhomboidal.

Answer 2

mand 1st molar

Question 3

mand 1st molar primar

Answer 3

Has no central fossa (but has mesial and distal triangular fossae).

■ Has a prominent buccal cervical ridge.

Question 4

Has a well-developed mesial marginal ridge.

■ Has a prominent transverse ridge (connects MB and ML cusps).

Answer 4

mand 1st molar primary

Question 5

CEJ curves apically on the mesial (from buccal view).

Answer 5

mand 1st molar

primary

Question 6

4 cusps: MB (largest), ML (tallest, sharpest), DB, DL (smallest).

Answer 6

mand 1st molar primary

Question 7

mand 1st molr primary

Answer 7

Occludes with maxillary canine and first molar

Question 8

Generally resembles permanent mandibular first molar.

■ Occlusal shape is rectangular.

Answer 8

mand 2nd molar primary

Question 9

Widest (M-D) primary tooth.

■ Has a prominent buccal cervical ridge

Answer 9

mand 2nd molar primary

Question 10

5 cusps: MB, ML, D (almost as large as MB and DB cusps), DB, DL.

Answer 10

mand 2nd molar primary

Question 11

Occludes with maxillary first and second molars

Answer 11

mand 2nd molar primary

Question 12

Contains a single canal from the pulp chamber to the apical foramen.

Answer 12

pulp canal type 1

Question 13

Type II pulp canal

Answer 13

Contains two separate canals leaving the pulp chamber, but later

merge together just short of the apical foramen.

Question 14

Contains two separate canals leaving the pulp chamber which

exit the root at two separate apical foramina.

Answer 14

Type III pulp canal

Question 15

Contains a single canal leaving the pulp chamber, but dividing

into two separate canals which exit the root at two separate apical

foramina

Answer 15

Type IV pulp canal

Question 16

ass. pulp canal

Answer 16

Found in cervical 1/3 of root and furcations.

■ Allow pulp to communicate with PDL space

Question 17

ass. pulp canal

Answer 17

Contains pulpal nervous and vascular tissue.

Question 18

https://drive.google.com/open?id=0B9PB0k0jCjRoVWdiMUc5NXg0UTA

Answer 18

https://drive.google.com/open?id=0B9PB0k0jCjRoV3B6RFBZQkVodW8

Question 19

https://drive.google.com/open?id=0B8uJUY-tie8GRVF6ZUhTV25hOHM

Answer 19

https://drive.google.com/open?id=0B8uJUY-tie8GOUZEdl8zWl8zQjA

Question 21

pulp horns

Answer 21

More pointed

Extend closer to cusp tips (especially on mesial surfaces)

Question 22

Larger

More closely approximate shape of crowns

Answer 22

pulp chambers

Question 23

Succedaneous teeth:

Answer 23

Permanent teeth that occupy positions held by primary

teeth.

Question 24

Exfoliation:

Answer 24

Shedding of the primary teeth. This is accomplished partly by

the resorption of the deciduous roots by odontoclasts.

Question 25

Mixed dentition:

Answer 25

A dentition having both primary and permanent teeth.

Question 26

Active eruption:

Answer 26

Tooth movement from its germinative position until contact

is made with opposing and/or adjacent teeth.

Question 27

Passive eruption:

Answer 27

Tooth exposure secondary to the apical migration of the

junctional epithelium.

Question 28

Teeth erupt in pairs. and

■

Answer 28

Girls’ teeth erupt before boys’ teeth.

Question 29

Mandibular teeth generally erupt

Answer 29

before maxillary teeth.

Question 30

Eruption starts once —- of root formation is complete

Answer 30

Eruption starts once 50% of root formation is complete

Question 31

I x+ C y+ M z

Answer 31

I 2/2 + C 1/1 + M 2/2

Question 32

eruption sequence

Answer 32

I1 I2 M1 C M2

6 9 12 18 24

Question 33

4–6 in utero

Answer 33

calc.starts of CI to 2nd molar

Question 34

6–10 wk

Answer 34

calc ends ofCI

Question 35

6;9 month

Answer 35

1st molar ; canine

calc.ends

Question 36

10-12 weeks

Answer 36

calc ends of LI

Question 37

10-12 months

Answer 37

calc ends of 2nd molars

Question 38

development

Answer 38

Begin to develop at 6 weeks in utero.

Question 39

tooth development

Answer 39

Calcification starts at 4–6 months (18 weeks) in utero (2nd trimester).

Question 40

Apices are complete 1–11/2 years after eruption (by age 3).

Answer 40

tooth development

Question 41

https://drive.google.com/open?id=0B9PB0k0jCjRod243THlsV1ZuUWs

Answer 41

https://drive.google.com/open?id=0B8uJUY-tie8GZFZMV0FaNTlwbjA

Question 42

mixed dentate

Answer 42

■ Occurs from ages 6 through 12 years.

■

Question 43

start and end of mixed dentition

Answer 43

Starts: Eruption of the permanent 1st molar.

■ Ends: Exfoliation of the primary maxillary canine.

Question 44

Permanent incisors often erupt —— to their primary counterparts

Answer 44

Permanent incisors often erupt lingual to their primary counterparts

Question 45

24 teeth (12 per arch) once the permanent — molars erupt

Answer 45

24 teeth (12 per arch) once the permanent 1st molars erupt

Question 46

formula for permanent teeth

Answer 46

I 2/2 + C 1/1 + PM 2/2 + M 3/3

Question 47

M1 I1 I2 C PM1 PM2 M2 M3

6 y z 9–10 10–12 11–12 12 x

mand arch

Answer 47

M1 I1 I2 C PM1 PM2 M2 M3

6 6–7 7–8 9–10 10–12 11–12 12 17–21

Question 48

M1 I1 I2 PM1 PM2 C M2 M3

6 x 8–9 10–11 y 11–12 z 17–21

Answer 48

M1 I1 I2 PM1 PM2 C M2 M3

6 7–8 8–9 10–11 10–12 11–12 12 17–21