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Flashcards in Premolars Deck (104)
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1

Premolar Development

____ developmental lobes, most times

one exception: ______

four
mandibular second premolard

2

Maxillary Premolar Development
! 1st and 2nd: There are ______ developmental lobes
! There are ______ facial developmental lobes.
! The middle facial lobe forms the ______ tip
! The palatal developmental lobe forms the ______ cusp.

four
three
buccal cusp
lingual or palatal

3

Occlusal View
! ______: Linear elevation on the surface of the tooth
# Marginal Ridge: Extend ______; are the mesial and distal borders of the occlusal surface
# Cusp Ridges: Extend from the ______
$ M-D: Form the ______ and ______ borders of the occlusal surface
$ B-L: Form the ______ on the occlusal surface –______ and ______

ridge
B-L
cusp tip
buccal
lingual
internal ridges
triangular ridges
transverse ridges

4

______: Linear intersection of developing lobes
! ______: A rounded or angular depression found on the surface of a
tooth
! ______: A defect found in the developmental groove
! ______: A defect found in the fossa

developmental grooves
fossa
fissure
pit

5

Occlusal View
! Cusp Ridges:
B-L:
• 􏰀______􏰀 • 􏰁______􏰀

triangular ridges
transverse ridges

6

Maxillary First Premolar
Eruption: _____

10-11 years

7

Maxillary First Premolar

The _____ crown dimension is greater than the mesiodistal crown dimension
! NOTE: this is true for _____ premolars

occlusocervical
all

8

UNIQUE CHARACTERISTICS Maxillary First Premolar–Buccal View
! The outline form of the crown has been described as:
# _____
# shaped like a _____
# _____ in the occlusal half of the crown

trapezoidal
pentagon
ovoid

9

UNIQUE CHARACTERISTICS Maxillary First Premolar–Buccal View
! ***The mesial cusp ridge of the buccal cusp is _____ than the distal cusp ridge and may be concave or notched
! The distal cusp ridge more _____ than the mesial cusp ridge
! The buccal cusp is long and pointed

longer
convex

10

UNIQUE CHARACTERISTICS Maxillary First Premolar–Buccal View
! The mesial contact is located in the _____ third; near the junction of the occlusal and middle thirds
! mesial surface of the crown below/(cervical) to the contact area is concave

middle

11

UNIQUE CHARACTERISTICS Maxillary First Premolar–Buccal View
! The distal contact is located in the _____ third; more _____ than the mesial contact
! The distal proximal surface contact area is _____

middle
cervical
convex

12

UNIQUE CHARACTERISTICS Maxillary First Premolar–BuccalView
! There is a well-developed _____
! Mesial and distal buccal developmental depressions are sometimes present

facial (buccal) ridge (middle lobe)

13

UNIQUE CHARACTERISTICS Maxillary First Premolar–Buccal View
! Most maxillary first premolars have _____ roots
! The buccal root has a frequent _____ curve near the apex

two
distal

14

UNIQUE CHARACTERISTICS Maxillary First Premolar – Occlusal View
! The occlusal view is described as _____

hexagonal

15

UNIQUE CHARACTERISTICS Maxillary First Premolar – Occlusal View
! The occlusal table is made up of the _____ marginal ridges and _____ M-D cusp ridges

two
four

16

UNIQUE CHARACTERISTICS Maxillary First Premolar – Occlusal View
! The B-L dimension is _____ than the M-D dimension
! The M-D of the buccal portion of the crown is _____
# Tooth tapers to the _____

greater
wider
lingual

17

UNIQUE CHARACTERISTICS
Maxillary First Premolar –
Occlusal View
! The mesial contact is located just buccal to the _____ of the crown
! The distal contact is also located _____ to the buccolingual center of the crown.
**more _____ than the mesial contact

buccolingual center
buccal
buccal

18

UNIQUE CHARACTERISTICS
Maxillary First Premolar –
Occlusal View
! Buccal triangular ridge
# _____
! Lingual triangular ridge
# seldom _____
# _____ surface
! The buccal and lingual triangular ridges meet forming a _____

prominent
prominent
flatter
transverse ridge

19

UNIQUE CHARACTERISTICS Maxillary First Premolar – Occlusal View
! There are _____ depressions in the mesial and distal of the central fossa groove
# _____ and _____ fossae

two
mesial
distal

20

UNIQUE CHARACTERISTICS Maxillary First Premolar – Occlusal View
! There is a major distinguishing feature:
# Mesial extension of the _____
# _____ Groove

central fossa groove
mesial marginal ridge

21

UNIQUE CHARACTERISTICS Maxillary First Premolar–Mesial View
! The Mesial Marginal Ridge Groove is _____
# ***MMRG distinguishes this premolar from _____

visible
all others

22

UNIQUE CHARACTERISTICS Maxillary First Premolar–Mesial View
! The buccolingual crown dimension is _____ than the occlusocervical crown dimension

greater

23

UNIQUE CHARACTERISTICS Maxillary First Premolar–Mesial View
! The outline form of the crown has been described as _____
! The occlusal table is centered over the _____ trunk

trapezoidal
root

24

UNIQUE CHARACTERISTICS Maxillary First Premolar–Mesial View
! The lingual cusp is _____ and more _____ than the buccal cusp
! The buccal cusp is about _____ longer than the lingual cusp

shorter
blunt
1 mm

25

UNIQUE CHARACTERISTICS Maxillary First Premolar–Mesial View
! The lingual cusp tip is not as _____ as the buccal cusp tip.

sharply pointed

26

UNIQUE CHARACTERISTICS Maxillary First Premolar–Mesial View
! The buccal height of contour is located in the _____ third of the crown
! The lingual height of contour is located in the **_____ third of the crown

cervical
middle

27

UNIQUE CHARACTERISTICS Maxillary First Premolar–Mesial View
! The mesial crown surface has a _____ developmental depression
! This marked depression continues apically and joins the _____ depression

cervical
root

28

UNIQUE CHARACTERISTICS Maxillary First Premolar–Mesial View
! _____ pulpal canals

two

29

UNIQUE CHARACTERISTICS Maxillary First Premolar–Distal View
! The distal marginal ridge does not possess a _____ that crosses the ridge

developmental groove

30

UNIQUE CHARACTERISTICS Maxillary First Premolar–Distal View
! The distal cervical crown surface does not have a _____

depression