week 1 endo Flashcards
what is the length of the upper first molar
average length 22mm
how many canals does a upper first molar have
4 canals in around 95%
how many roots does a upper first molar have
3 roots
2 B
1P
HOW MANY FORMAINA DOES A UPPER FIRST MOLAR HAVE
3 foramina in 60% of cases
4 in 40% of cases
what is the average length of a lower canine
27mm
how many roots in a lower canine
1 root in 95% of cases
how many canals does the lower canine have
80% chance one canal
20% two canals
what is the average length of the lower first molar
22mm
how many roots are in a lower first molar
95% chance of 2 roots
5% chance in 3 roots
how many foramina does the mesial root have
60% chance of 2 foramina
how many foramina does the distal root have
85% chance of 1 foramina
how many canals does the mesial root have
1 canal- 12%
2 canals 87%
3 canals 1 %
what is the length of the lower first premolar
23mm
how many roots does the lower first premolar have
80% chance of 1 root
how many canals does a lower first premolar have
75% chance of 1 canal
2 canals which the chance is 24%
if we see a canal that is circular in cross section what does that mean
there is another one
what does circular cross sectional canals mean
there is another
what does an oval cross sectional shape mean
there is 1 but not strict
describe c shaped canals
Single ribbon shaped orifice with a 180° arc starting at mesio-lingual line angle
define the Law of symmetry I
EXCEPT for maxillary molars the orifices of the canals are equidistant from the line in M–>D through the pulp floor
define the law of symmetry II
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
define the law of colour chance
the colour of the pulp floor is always darker than the walls
define the law of orifice location I
orifices of the root canal are always located at the junction of the walls and the floor
define the law of orifice location II
The orifices of the root canal are always located at the angles in the floor wall junction
define the law of orifice location III
The orifices of the root canals are located at the end of the root developmental fusion lines
