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Dental Development and Anatomy > Molars > Flashcards

Flashcards in Molars Deck (97)
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1

Molars

_____ developmental lobes

_____ - 5 lobes

4-5
mandibular M1

2

Molars
Basic Occlusal Anatomy:
Cusps
_____
B-L Ridges
_____
Fossae

MD ridges
Grooves

3

Maxillary First Molar
Eruption: _____

6 years

4

UNIQUE CHARACTERISTICS Maxillary First Molar–Buccal View
! The M-D crown dimension is _____ than the O-C crown dimension*
! The outline form of the crown is a _____

greater
trapezoid

5

UNIQUE CHARACTERISTICS Maxillary First Molar–Buccal View
! The tips of all the major cusps are visible except the _____ cusp tip
! The _____ cusp is visible between the MB and DB cusp

DL
ML

6

UNIQUE CHARACTERISTICS Maxillary First Molar–Buccal View
! The MB cusp is approximately the same _____ as the DB cusp.
" Sometimes it is slightly _____ than the DB cusp
! The MB cusp is _____ than the DB cusp

height
higher
wider

7

UNIQUE CHARACTERISTICS Maxillary First Molar–Buccal View
! The buccal groove extends cervically to the _____ third of the crown surface and occasionally there may be a _____ where the groove terminates

middle
pit

8

UNIQUE CHARACTERISTICS Maxillary First Molar–Buccal View
! The M contact area is located at the junction of the _____ and _____ thirds
! The D contact is located in the _____ third near the O/C center

occlusal
middle
middle

9

UNIQUE CHARACTERISTICS Maxillary First Molar–Buccal View
! There are _____ roots that are nearly the same length
" _____, _____, and _____
" the _____ root is the
largest
! The MB root is slightly _____ than the DB root

three
MB, DB, P
palatal
longer

10

UNIQUE CHARACTERISTICS Maxillary First Molar–Buccal View
! Root trunk
! _____ – where the root trunk separates into individual roots
! The _____ furcation separates the MB and DB roots

furcation
buccal

11

UNIQUE CHARACTERISTICS Maxillary First Molar–Mesial View
! The B-L crown dimension is _____ than the O-C crown dimension
! The outline form of the crown is _____ from the proximal view

greater
trapezoidal

12

UNIQUE CHARACTERISTICS Maxillary First Molar–Mesial View
! Major cusps visible from a mesial view are the _____ and _____
And when present:
! 5th Cusp:
" _____ is visible if present (_____ of the time)

MB
ML
cusp of carabelli
70%

13

UNIQUE CHARACTERISTICS Maxillary First Molar–Mesial View
! The B height of contour is located in the _____ third of the crown
! The L height of contour is located in the _____ third of the crown
! When teeth have a large Cusp of Carabelli, the lingual height of contour is located in the _____ 1/3 of this cusp

cervical
middle
occlusal

14

UNIQUE CHARACTERISTICS Maxillary First Molar–Mesial View
! The MB root is wide _____
! The DB root is hidden by the MB root from the _____ view
! The buccal cusp is about _____ longer than the lingual cusp

buccolingually
mesial
1 mm

15

UNIQUE CHARACTERISTICS Maxillary First Molar–Mesial View
! The palatal root diverges (flares) to the _____
! The palatal root is described as “_____” shaped

lingual
banana

16

UNIQUE CHARACTERISTICS Maxillary First Molar–Mesial View
! The mesial furcation
separates the _____ root and the _____ root

MB
P

17

UNIQUE CHARACTERISTICS Maxillary First Molar – Occlusal View
! The _____ crown dimension is greater than the _____ crown dimension***
! The crown is wider BL in the _____ half of the crown
***True for ALL _____

BL
MD
mesial
max molars

18

UNIQUE CHARACTERISTICS Maxillary First Molar – Occlusal View
! The _____ M-D crown dimension is greater or equal to the _____ M-D crown dimension

lingual
buccal

19

UNIQUE CHARACTERISTICS
Maxillary First Molar –
Occlusal View
! The Cusp of Carabelli may be:
" distinctly _____
" _____ visible
" not present at all
# Missing _____ of the time
" If present – will be on both _____ and _____ sides

formed
barely
30%
right
left

20

UNIQUE CHARACTERISTICS Maxillary First Molar – Occlusal View
! The outline of the occlusal surface resembles
" a _____
" a _____

parallelogram
rhomboid

21

UNIQUE CHARACTERISTICS Maxillary First Molar – Occlusal View
! The M proximal contact is located _____ to the center of the crown
! The D proximal contact is located at the _____ of the crown

B
center

22

UNIQUE CHARACTERISTICS Maxillary First Molar – Occlusal View
! Cusp size: (from largest to smallest):
" _____
" _____
" _____
" _____
" _____

ML
MB
DB
DL
cusp of carabelli

23

UNIQUE CHARACTERISTICS Maxillary First Molar – Occlusal View
! The large ML cusp has _____ triangular ridges
" _____
" _____

two
mesial
distal

24

UNIQUE CHARACTERISTICS Maxillary First Molar – Occlusal View
! The M triangular ridge of the _____ cusp meets the triangular ridge of the _____ cusp to form a _____ ridge
! The distal ridge of the _____ cusp and the triangular ridge of the _____ cusp form the _____ ridge

ML
MB
transverse
ML
DB
oblique

25

UNIQUE CHARACTERISTICS Maxillary First Molar – Occlusal View
! The _____ crosses the occlusal surface in a _____ direction***
! Crossed by a developmental groove BUT NOT as deeply as the rest of the _____
! The oblique ridge is at about the same height as the _____ ridges

oblique ridge
diagonal
central groove
marginal ridges

26

UNIQUE CHARACTERISTICS
Maxillary First Molar –
Occlusal View
! There is a unique groove that separates the M and D triangular ridges of the ML cusp
" Called a “_____”
! There is a distinct triangular arrangement of the _____, _____, and _____ cusps
" Termed a _____

stuart groove
MB, DB, ML
trigone

27

UNIQUE CHARACTERISTICS Maxillary First Molar – Occlusal View
! There are 5 major grooves present:
" _____
" _____
" Distolingual or Distal oblique
" Lingual
" _____ of the oblique ridge (not as _____ as the other grooves)

central
facial
transverse
deep

28

UNIQUE CHARACTERISTICS Maxillary First Molar–Distal View
! The D marginal ridge is located more _____ than the M marginal ridge
! The distal furcation separates the _____ and _____ roots
" Located closer to the _____ than the other furcations
" Root trunk _____ from this view

cervical
DB
P
root tips
longer

29

UNIQUE CHARACTERISTICS Maxillary First Molar–Distal View
! The DB root is _____ than the MB root and not as wide _____.
! The DB root is the _____, shortest, and _____ root
! The DB root apex is more _____ than the MB root apex

shorter
B-L
smallest
weakest
pointed

30

UNIQUE CHARACTERISTICS Maxillary First Molar– Lingual View
! Little if any of the proximal surfaces are visible from a _____ view
" the lingual half of the crown usually is equal to or greater _____ than the buccal half of the crown
" No _____ taper

lingual
MD
lingual