week 1 endo

Question 1

what is the length of the upper first molar

Answer 1

average length 22mm

Question 2

how many canals does a upper first molar have

Answer 2

4 canals in around 95%

Question 3

how many roots does a upper first molar have

Answer 3

3 roots
2 B
1P

Question 4

HOW MANY FORMAINA DOES A UPPER FIRST MOLAR HAVE

Answer 4

3 foramina in 60% of cases

4 in 40% of cases

Question 5

what is the average length of a lower canine

Answer 5

27mm

Question 6

how many roots in a lower canine

Answer 6

1 root in 95% of cases

Question 7

how many canals does the lower canine have

Answer 7

80% chance one canal

20% two canals

Question 8

what is the average length of the lower first molar

Answer 8

22mm

Question 9

how many roots are in a lower first molar

Answer 9

95% chance of 2 roots

5% chance in 3 roots

Question 10

how many foramina does the mesial root have

Answer 10

60% chance of 2 foramina

Question 11

how many foramina does the distal root have

Answer 11

85% chance of 1 foramina

Question 12

how many canals does the mesial root have

Answer 12

1 canal- 12%
2 canals 87%
3 canals 1 %

Question 13

what is the length of the lower first premolar

Answer 13

23mm

Question 14

how many roots does the lower first premolar have

Answer 14

80% chance of 1 root

Question 15

how many canals does a lower first premolar have

Answer 15

75% chance of 1 canal

2 canals which the chance is 24%

Question 16

if we see a canal that is circular in cross section what does that mean

Answer 16

there is another one

Question 17

what does circular cross sectional canals mean

Answer 17

there is another

Question 18

what does an oval cross sectional shape mean

Answer 18

there is 1 but not strict

Question 19

describe c shaped canals

Answer 19

Single ribbon shaped orifice with a 180° arc starting at mesio-lingual line angle

Question 20

define the Law of symmetry I

Answer 20

EXCEPT for maxillary molars the orifices of the canals are equidistant from the line in M–>D through the pulp floor

Question 21

define the law of symmetry II

Answer 21

except for the maxillary molar the orifcases of the canals lie on a line perpendicular 90 degrees to a line in the M-D direction

Question 22

define the law of colour chance

Answer 22

the colour of the pulp floor is always darker than the walls

Question 23

define the law of orifice location I

Answer 23

orifices of the root canal are always located at the junction of the walls and the floor

Question 24

define the law of orifice location II

Answer 24

The orifices of the root canal are always located at the angles in the floor wall junction

Question 25

define the law of orifice location III

Answer 25

The orifices of the root canals are located at the end of the root developmental fusion lines