primary tooth morphology

Question 1

gingival cysts (epsteins pearls)

Answer 1

occur before erruption

whiteish , found on gingiva , no treatment needed consist of keratin

Question 2

congenital epulis

Answer 2

occur before erruption
large mass of cells on alveolar ridge
may need treatment if interfering with feeding

Question 3

natal/neonatal teeth

Answer 3

natal = present at birth 
neonatal = errupt during first month of life

Question 4

eruption cyst

Answer 4

cyst overlying where developing tooth about to erupt
blue as filled with blood
should dissolve as tooth erupts

Question 5

what is the general rule when talking about primary tooth eruption

Answer 5

lowers before uppers except laterals

Question 6

what is the traditional order of tooth eruption for the primary dentition

Answer 6

1,2,4,3,5

Question 7

when is the primary dentition usually complete

Answer 7

2 and a half to 3 and a half years

Question 8

why is pulpal exposure more likely in the primary dentition

Answer 8

pulp chambers are v large in proportion to the crown

pulp horns are much higher and closer to enal than permanent dentition teeth

Question 9

primate space

Answer 9

in maxillary arch - space between canine and lateral incisor (mesial to canine)
in mandibular arch - space between canine and 1st molar (distal to canine)

Question 10

leeway space

Answer 10

extra mesiodistal space occupied by primary molars which are wider than subsequent pre molars
usually 1.5mm either side in uppers and 2.5mm either side in lowers

Question 11

what is the usual age range for a mixed dentition

Answer 11

6-11 years

Question 12

what is the general rule of thumb for permanent tooth eruption

Answer 12

lowers before uppers except 2nd pre molars

Question 13

what is the upper arch permanent eruption sequence

Answer 13

6,1,2,4,5,3,7,8

1st molars then front to back except canines

Question 14

what is the lower arch permanent eruption sequence

Answer 14

6,1,2,3,4,5,7,8

1st molars then front to back

Question 15

why might there by temporary spacing between permanent upper centrals
ugly duckling phase

Answer 15

due to close root proximity of erupting 2s and 3s

usually resolves itself

Question 16

how long do roots take to mature after eruption

Answer 16

primary roots - 1.5 years

permanent - 3 years

Question 17

what primary tooth has a transverse ridge and where does it run

Answer 17

upper 2nd primary molars

runs obliquely from disto buccal to mesio palatal cusp

Question 18

what tooth is the lower second primary molar very similar to

Answer 18

Lower 1st permanent molar

both have 5 cusps

Question 19

what tooth has a squareish occlusal surface and a mesio buccal tubercle

Answer 19

upper first primary molar

doesnt look like any other tooth

Question 20

what tooth has a rectangular occlusal surface and a mesio buccal tubercle

Answer 20

lower 1st primary molar