primary dentition Flashcards
3 differences between primary and permanent dentition?
primary is lighter in colour
primary enamel is softer
primary teeth are smaller
where is the cusp of carabelli often present on primary teeth?
mesio-palatal cusp of upper E’s
how many cusps do upper Ds have? and what are they?
have 3 cusps - mesio-buccal, disto-buccal, palatal
how many cusps do lower Ds have and what are they?
have 4 cusps - mesio-buccal, mesio-lingual, disto-buccal, disto-lingual
what are cusps separated by?
fissures
Large bulge of enamel in cervical region of mesio-buccal area known as the?
Tubercle of Zukerkandl
what is the order of primary teeth erupting?
A B D C E
A erupts approx?
6 months
B erupts ?
9 months
C erupts?
18 months
D erupts?
12 months
E erupts?
24 months
on the incisal edge of newly erupted teeth there are small tubercles called what?
mamelons
the crowns of deciduous teeth are similar to permanent teeth but differ in some ways what are 3 ways?
the cusps on new erupted teeth are more pointed
deciduous teeth are smaller
deciduous teeth are more bulbous
give two differences between the roots of deciduous molars to permanent molars?
deciduous roots are very fine compared to permanent
deciduous roots are shorter
deciduous roots are more divergent
how many roots does the upper first deciduous molar have?
3
what percentage of teeth have a cusp of carabelli?
between 50-75%
a cervical bulge is often present on the buccal aspect of the crown of a lower first deciduous molar what is the name of this?
the tubercle of zuckerkandl
how many roots does the lower second deciduous molar have and where are they situated?
2 roots
mesial
distal
give the order of eruption of the upper & lower deciduous teeth
ABDCE
what age is the primary dentition fully erupted?
two and a half years
