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Dental Hygiene: Anatomy > Maxillary 2nd Premolar > Flashcards

Maxillary 2nd Premolar Flashcards

1
Q

calcifies

A

2yrs

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2
Q

erupts

A

10-12yrs

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3
Q

root completion

A

12-14yrs

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4
Q

Comparisons with mx 1st premolar

A

-more rounded/less angular
-more variations in crown size
-buccal and lingual cusps closer to same height
-no mesial concavity
-usually single rooted
-mesiobuccal cusp ridge is shorter than distobuccal cusp ridge

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5
Q

Facial view: facial cusp

A

not as long and more rounded
*less crown taper

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6
Q

Facial view: height of contour

A

cervical 3rd

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7
Q

Lingual view: lingual cusp is offset to the…

A

mesial

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8
Q

Lingual view: the lingual cusp is relatively…

A

sharp

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9
Q

Lingual view: height of contour

A

cervical 3rd

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10
Q

Proximal view: both cusp tips are about _____ in length

A

equal; lingual can be slightly shorter

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11
Q

Mesial view: there is no mesial concavity so the crown is ____; there is also ___ mesial marginal groove

A

convex; NO

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12
Q

Occlusal view: the crown outline is shaped more…

A

ovoid (rounded)

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13
Q

Occlusal view: compared to 1st PM there is ____ distance between the cusps

A

more

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14
Q

Occlusal view: the lingual cusp is almost as _____ as the buccal cusp

A

wide

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15
Q

Occlusal view: compared to 1st premolars, describe the transverse ridge and fossa

A

less distinct ridge; fossa closer to center

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16
Q

Occlusal view: grooves

A

-more irregular central grooves (shorter and shallower)
-more supplementary grooves present (more wrinkled appearance)
-no mesial marginal groove

17
Q

Compared to 1st premolars, the root is…

A

almost equal or slightly longer and not as prominent

18
Q

The depression on the ______ is often deeper

A

*distal

19
Q

the root often has a _____ inclination

A

distal

20
Q

Usually single rooted with ____ canal

A

1 canal, can have 2 (40%)
if 2, usually join to single apical foramen
2 pulp horns
*can have 2 roots w/ 2 canals

Dental Hygiene: Anatomy (28 decks)

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