anatomy and development

Question 1

what primary tooth does not resemble any other tooth

Answer 1

mand 1st primary molar

Question 2

how much smaller are the volume and enamel area

Answer 2

1/2 the size of perm teeth

Question 3

t/f primary teeth are whiter than perm successors

Answer 3

trew

Question 4

difference bt primary and perm molar crowns

Answer 4

smaller, more bulbous with more cervical constriction (bell shaped)
buccal bulge
broad, flat prox contacts

Question 5

t/f primary max 2nd molar is a smaller version of perm max 1st molar

Answer 5

true.

Question 6

t/f pulps of prim molar have long m pulp horns

Answer 6

true

Question 7

describe primary roots

Answer 7

slender and tapering
longer in proportion to the crown than in the corresponding perm tooth
prim molar roots diverge and bulge to envelope the perm premolar crowns

Question 8

describe pulp in prim teeth

Answer 8

horns are longer and more pointed
pulps are larger
canal space is not readily filled when root canal therapy is indicated

Question 9

which pulp horn is the most prominent

Answer 9

MB

Question 10

t/f dentin is 1/4 the thickness of the perm dentition

Answer 10

false. 1/2

Question 11

enamel rods in gingival 1/3 extend in what direction

Answer 11

occlusally from the DEJ

Question 12

describe the thickness of primary enamel

Answer 12

1mm, 1/2 the thickness of corresponding perm teeth

Question 13

describe the thickness of primary dentin

Answer 13

half the thickness of the corresponding perm teeth, less dense, more easily cut

Question 14

describe the interdental papilla of primary dentition

Answer 14

high and extends to interprox contact

Question 15

t/f there is a low degree of bruxism in kids

Answer 15

false. a ton. primary molars typically have a flat occlusal table

Question 16

t/f sequence of eruption is more important than time of eruption

Answer 16

true

Question 17

rule of 4

Answer 17

eruption of 4 teeth every 4 mo beginning with 4 teeth at 6-7mo

Question 18

what teeth erupt first

Answer 18

mand centrals at 6-7 mo

Question 19

primate space

Answer 19

m to max canines, d to mand canines

Question 20

prim teeth should be in normal alignment and occlusion shortly after age ___ with al the roots fully formed by the time the child is ___ yo

Answer 20

2, 3

Question 21

flush terminal plane

Answer 21

prim 2nd molars and canines end to end

Question 22

mesial step

Answer 22

class I canine (mand canine ant to max canine)

Question 23

distal step

Answer 23

class II canine

Question 24

what is the best predictor/determining factor for molar relationship

Answer 24

combine the canine with 2nd molar

Question 25

when does no primate space exist?

Answer 25

late mesial drift

Question 26

at what age will you have delayed eruption with a premature loss of your primary molar

Answer 26

loss at 5 yrs or younger

Question 27

when would you get arch length loss

Answer 27

when mand 2nd perm molar erupts before 2nd pm

Question 28

t/f. mesial force causes molars to move into pm space before pm erupts

Answer 28

true

Question 29

natal teeth

Answer 29

present at birth

Question 30

neonatal teeth

Answer 30

erupt during first month of life

Question 31

riga-fede

Answer 31

traumatic ulceration of the ventral surface of tongue commonly associated with natal and neonatal teeth in newborns

Question 32

gemination

Answer 32

single tooth bud, 2 crowns

Question 33

fusion

Answer 33

union of 2 separate teeth, 2 roots.

Question 34

concrescence

Answer 34

fusion of 2 teeth along root surface | NON developmental defect

Question 35

turner tooth

Answer 35

localized enamel hypoplasia | trauma or localized infection during the apposition stage of development

Question 36

hyperdontia

Answer 36

more common in maxilla mesiodens males affected more than women, 2:1

Question 37

hypodontia

Answer 37

more common in mand | 2nd pm then lat incisor