tooth morphology/eruption

Question 1

what two roots does the maxillary first upper premolar have?

what other feature does it have?

Answer 1

buccal and palatal roots

canine fossa - below contact point with canine

Question 2

how many and what roots does an maxillary first molar have?

what other feature does it have?

Answer 2

3 roots - palatal, mesiobucal and distalbuccal

cusp of carabelli palatally

Question 3

what roots does a mandibular first molar have?

what other feature does it have?

Answer 3

mesial and distal roots

buccal groove ends in foramen caecum

Question 4

what is the tubercle of zuckerkandl?

Answer 4

cervical buldge above buccal portion of mesial root on an upper and lower first deciduous molar

Question 5

what are the mean differences of deciduous teeth?

Answer 5

smaller
softer enamel
slender roots and thin root canals
smaller pulp to crown ratio
more bulbous
lighter
more divergent roots

Question 6

first eruptions - girls/boys? mandibular or maxillary?

Answer 6

girls

mandibular

Question 7

how long does root completion take after eruption?

Answer 7

up to 2 years

Question 8

deciduous teeth eruption sequence?

Answer 8

ABDCE

Question 9

upper permanent dentition eruption sequence?

Answer 9

61245378

Question 10

lower permanent dentition eruption sequence?

Answer 10

61234578

Question 11

at what week in utero does tooth development start?

Answer 11

6 weeks

Question 12

what are the ages of children when upper
A
B
D
C
E
erupts?

Answer 12

A - 7 months
B - 8 months
D - 12-16 months
C - 16-20 months
E - 20-30 months

Question 13

why does the D erupt before the C?

Answer 13

to stabilise the dentition

Question 14

what are the ages of children when the lower
A
B
D
C
E
erupt?

Answer 14

A - 6 months
B - 7 months
D - 12-16 months
C - 16-20 months
E - 20-30 months

Question 15

what are the ages of children when the upper 
6
1
2
4
5
3
7
8
erupt?

Answer 15

6 - 6-7 years
1 - 7-8 years
2 - 8-9 years 
4 - 10-12
5 - 10-12
3 - 11-12
7 - 12-13
8 - 17-20

Question 16

what are the ages of children when the lower
6
1
2
3
4
5
7
8
erupt?

Answer 16

6 - 6-7 years
1 - 6-7 years
2 - 7-8 years
3 - 9-10
4 - 10-12
5 - 10-12
7 - 12-13
8 - 17-20