02 tooth morphology Flashcards
what is the most common type of collagen in dentin?
collagen type I
what is the most common type of collagen in the pulp
type I an III
one single canal with one foramen
weine type I
two canals converging to one foramen
weine type II
two canals and two foramina
weine type III
one canal dividing into two canals with two separate foramina
weine type IV
which teeth have a “lingual shoulder”
all anterior teeth
which tooth has a pulp chamber that is wider buccolingually than mesiodistally?
Maxillary and mand canines
mandibular incisors
max 1st and 2nd pms
mand 1st pm
root system of mand canine
similar to max canine, but smaller and two roots and two canals is not uncommon
-14% two canals at orifice and 6% two canals at apex
most common root system of max 1st PM
two roots and two canals (can have 1,2,3 roots and canals)
which tooth can have a bayonet root?
max 2nd pm
which tooth(s) is prone to fractures of the buccal cusps
max 1st and 2nd pms (and mesiodistal root fractures)
which tooth has a 3 times higher incidence in african-Americans of having two roots?
mandibular 1st and 2nd pm
how many roots does the mand 2nd pm have?
- 5% one canal
2. 5% two canals
