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what is the eruption date for the maxillary 1st premolars?
10-11 years
what is the eruption date for the maxillary 2nd premolars?
10-12 years
what is the eruption date for mandibular 1st premolars?
10-12 years
what is the eruption date of the mandibular 2nd premolars?
10-12 years
when is maxillary 1st premolar root completion?
12-13 years
when is maxillary 2nd premolars root completion?
12-14 years
when is mandibular 1st premolars root completion?
12-13years
when is mandibular 2nd premolars root completion?
13-14 years
what are three distinguishing features for the maxillary 1st premolars?
larger than 2nd
mesial concavity extends to root
mesial marginal groove
what are two distinguishing features for the maxillary 2nd premolars?
buccal and lingual cusps are nearly the same height
occlusal anatomy is more variable than 1st
what are three distinguishing features for the mandibular 1st premolars
large buccal cusp; small afunctional lingual cusp
mesiolingual developmental groove
well developed marginal ridges
what is one distinguishing feature of the mandibular 2nd premolars..explain
2 forms
2 cusps-45%
3 cusps-55%
what is the crown shape of the maxillary 1st premolar?
hexagon
what is the crown shape of them maxillary 2nd premolars
round/ovoid
what is the crown shape of the mandibular 1st premolars
diamond
what is the crown shape of the mandibular 2nd premolar?
2cusp-heart
3cusp-square
what are 4 ways to distinguish right from left for the maxillary 1st premolars?
mesially displaced lingual cusp
mesial concavity
mesial marginal groove
mesial cusp slope is longer than distal cusp slow on buccal cusp
what are 2 was to distinguish right from left on the maxillary 2nd premolars
lingual cusp displaced toward mesial
root distally curved
what are three ways to distinguish right from left on the mandibular 1st premolar?
mesial cusp shorter than distal
distal margin more rounded
root curves to distal
what are two ways to distinguish right from left on the mandibular 2nd premolar?
2cusp-lingual cusp shifts mesially
3cusp-ML cusp larger
how many roots does the maxillary 1st premolar have?
2 roots 80%
how many roots does the maxillary 2nd premolar have?
single rooted
how many roots does the mandibular 1st premolar have?
single rooted
how many roots does the mandibular 2nd premolar have?
single rooted
what is a characteristic of the mandibular 1st premolars root?
distal groove
what are two characteristics of the mandibular 2nd premolars roots?
proximal root concavities
blunt apex
what are the clinical considerations for the maxillary 1st and 2nd premolars?
sinusities
what is the clinical consideration for the mandibular 1st premolars?
snake eyes-sillver fillings in deep occlusal fossae
what are the clinical considerations for the mandibular 2nd premolar?
congenitally mission 2nd to the maxillary lateral incisors and 3rd molars
Author
sweetpea281
ID
41824
Card Set
dental anatomy
Description
premolar characteristics
Updated
2010-10-13T04:16:26Z
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