Molars Flashcards
Molars
_____ developmental lobes
_____ - 5 lobes
4-5
mandibular M1
Molars Basic Occlusal Anatomy: Cusps \_\_\_\_\_ B-L Ridges \_\_\_\_\_ Fossae
MD ridges
Grooves
Maxillary First Molar
Eruption: _____
6 years
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
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
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
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
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
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
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
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
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%
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
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
UNIQUE CHARACTERISTICS Maxillary First Molar–Mesial View
! The palatal root diverges (flares) to the _____
! The palatal root is described as “_____” shaped
lingual
banana
UNIQUE CHARACTERISTICS Maxillary First Molar–Mesial View
! The mesial furcation
separates the _____ root and the _____ root
MB
P
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
UNIQUE CHARACTERISTICS Maxillary First Molar – Occlusal View
! The _____ M-D crown dimension is greater or equal to the _____ M-D crown dimension
lingual
buccal
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
UNIQUE CHARACTERISTICS Maxillary First Molar – Occlusal View
! The outline of the occlusal surface resembles
“ a _____
“ a _____
parallelogram
rhomboid
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
UNIQUE CHARACTERISTICS Maxillary First Molar – Occlusal View
! Cusp size: (from largest to smallest):
“ _____
“ _____
“ _____
“ _____
“ _____
ML MB DB DL cusp of carabelli
UNIQUE CHARACTERISTICS Maxillary First Molar – Occlusal View
! The large ML cusp has _____ triangular ridges
“ _____
“ _____
two
mesial
distal
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
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
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
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
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
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
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
UNIQUE CHARACTERISTICS Maxillary First Molar– Lingual View
! The ML cusp is usually the _____ and _____ cusp on the first molar
! The DL cusp is _____ and _____ than the ML cusp
largest
longest
shorter
narrower
UNIQUE CHARACTERISTICS Maxillary First Molar– Lingual View
! The Cusp of Carabelli is on the lingual surface of the _____ cusp.
! If present, it is located on _____.
! The Cusp of Carabelli is located about _____ apical to the ML cusp tip
ML
both sides of the jaw
2mm
UNIQUE CHARACTERISTICS Maxillary First Molar– Lingual View
! The DL groove originates on the _____ and goes onto the lingual surface becoming the _____.
! The buccal roots are visible from a _____ view due to their wide M-D spread
occlusal surface
lingual groove
lingual
UNIQUE CHARACTERISTICS Maxillary First Molar– Lingual View
! The _____ root is the longest, largest, and strongest of the 3 first molar roots
! The P root is wider _____ than B-L
P
M-D
Maxillary Second Molar
Eruption: _____
12-13 years
UNIQUE CHARACTERISTICS Maxillary Second 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
UNIQUE CHARACTERISTICS Maxillary Second Molar–Buccal View
! The _____ cusp is higher than the _____ cusp.
! The _____ cusp is wider than the _____ cusp
MB
DB
MB
DB
UNIQUE CHARACTERISTICS Maxillary Second Molar–Buccal View
! The B groove extends onto the B surface, but NOT to the _____ third of the crown surface like the _____
middle
first molar
UNIQUE CHARACTERISTICS Maxillary Second Molar–Buccal View
! The M contact area is located at the junction of the _____ and _____ thirds
! The D contact is located in the _____ third
“ It is more _____ than the mesial contact
occlusal
middle
middle
cervical
UNIQUE CHARACTERISTICS Maxillary Second Molar–Buccal View
! There are _____ roots that are nearly the same length
“ _____, _____, and _____
“ The P root is the _____
! The _____ and _____ roots are about the same length
“ Less _____ apart M-D
three MB, DB, P largest MB DB spread
UNIQUE CHARACTERISTICS Maxillary Second Molar–Buccal View
! The buccal roots are nearly _____, not very curved,
“ and have a _____ inclination
! The root trunk is longer than the _____
“_____ furcation more apical
parallel
distal
first molar
buccal
UNIQUE CHARACTERISTICS Maxillary Second Molar–Mesial View
! The B-L crown dimension is _____ than the O-C crown dimension
! The outline form of the crown is _____
! There is no _____

greater
trapezoidal
cusp of carabelli
UNIQUE CHARACTERISTICS Maxillary Second 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
cervical
middle
UNIQUE CHARACTERISTICS Maxillary Second Molar–Mesial View
! The _____ dimension of the MB root is larger than the DB root
“ The _____ root is hidden by the _____ root
! The MB cusp is about _____ longer than the ML cusp
BL
distobuccal
mesiobuccal
1mm
UNIQUE CHARACTERISTICS Maxillary Second Molar–Mesial View
! The palatal root does not _____ towards the palate as much as the _____
flare
first molar
UNIQUE CHARACTERISTICS Maxillary Second Molar – Occlusal View
! The buccolingual crown dimension is _____ than the mesiodistal crown dimension ***
! The crown is wider buccolingually in the _____ half of the crown
greater
mesial
UNIQUE CHARACTERISTICS Maxillary Second Molar – Occlusal View
! The outline of the occlusal surface resembles a _____
rhomboid
UNIQUE CHARACTERISTICS Maxillary Second Molar – Occlusal View
! The M contact area is located _____ to the center of the crown
! the D contact area is located at the _____ of the crown
buccal
center
UNIQUE CHARACTERISTICS Maxillary Second Molar – Occlusal View
! The cusp size (from largest to smallest:
“ _____
“ _____
“ _____
“ _____
ML
MB
DB
DL
UNIQUE CHARACTERISTICS Maxillary Second Molar – Occlusal View
! There is considerable _____ in the size of the DL cusp
“ *About _____ of the time the DL cusp is missing
variation
1/3
UNIQUE CHARACTERISTICS Maxillary Second Molar – Occlusal View Present: " \_\_\_\_\_ " \_\_\_\_\_ " \_\_\_\_\_
stuart groove
oblique ridge
trigone
UNIQUE CHARACTERISTICS Maxillary Second Molar – Occlusal View
! The same _____ major grooves on the maxillary 1st molar are present:
“ _____
“ Facial/Buccal
“ _____ or _____
“ _____
“ Transverse groove of the oblique ridge
central
DL, DO
lingual
UNIQUE CHARACTERISTICS Maxillary Second Molar–Distal View
! The _____ and _____ cusp tips are visible beyond the outline of the _____ and _____ cusps
“ The M cusps are _____
MB, ML
DB, DL
higher
UNIQUE CHARACTERISTICS Maxillary Second Molar–Distal View
Like the Maxillary first molar:
! The D marginal ridge is located more _____
! The D furcation separates the _____ and _____ cusps
“ Located closer to the _____ than the other furcations
“ Root trunk _____ from this view
cervical DB P root tips longer
UNIQUE CHARACTERISTICS Maxillary Second Molar– Lingual View
! The crown shows a _____ taper
“ _____ slightly larger than _____ M-D
! The roots curve _____
lingual
B half
L half
distally
Maxillary Third Molar
Eruption: _____
17-21 years
Mandibular First Molar
Eruption: _____
6-7 years
UNIQUE CHARACTERISTICS Mandibular First Molar–Buccal View
! The M-D crown dimension is _____ than the O-C crown dimension
! The outline form is a _____
greater
trapezoid
UNIQUE CHARACTERISTICS Mandibular First Molar–Buccal View
_____ cusps:
! The _____ cusp is the largest, widest, and highest of the 3 buccal cusps
! The _____ cusp is smaller and sharper than the other buccal cusps
3
MB
D
UNIQUE CHARACTERISTICS Mandibular First Molar–Buccal View
! The two lingual cusps (ML and DL) are visible because they are _____ than the buccal cusps
! The buccal cusps are more _____ compared to the lingual cusps
“ Why?

longer
flat
UNIQUE CHARACTERISTICS Mandibular First Molar–Buccal View ! The MB groove " \_\_\_\_\_ than the DB groove " may have a deep pit at its \_\_\_\_\_ end " **area of \_\_\_\_\_ lesions also**
longer
cervical
Class I
UNIQUE CHARACTERISTICS Mandibular First Molar–Buccal View
! The M contact area is located at the junction of the _____ and _____ thirds
! The D contact area is located at the junction of the _____ and _____ third
“ _____ to the mesial contact
occlusal middle occlusal middle cervical
UNIQUE CHARACTERISTICS Mandibular First Molar–Buccal View
! There are _____ roots that are nearly the same length
“ Mesial - _____ pulpal chambers
“ Distal – _____ chamber
! The _____ root is longer than the _____ root
! The _____ root is straighter than the _____ root
2 2 1 M D D M
UNIQUE CHARACTERISTICS Mandibular First Molar–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
UNIQUE CHARACTERISTICS Mandibular First Molar–Mesial View
! The B-L crown dimension is _____ than the O-C crown dimension
! The shape from the proximal view is a _____
greater
rhomboid
UNIQUE CHARACTERISTICS First Mandibular First Molar–Mesial View
! The _____ root is wider B-L than the _____ root
“ Contains the _____ pulpal canal
“ Contains the _____ pulpal canal
! The large dimension of the mesial root prevents the _____ root from being visible when viewed from the _____
M D MB ML distal M
UNIQUE CHARACTERISTICS Mandibular First Molar – Occlusal View
! The M-D crown dimension is _____ than the B-L crown dimension
” **unlike _____
! The greatest B-L dimension is at the _____ cusp area
greater
maxillary molars
DB/DL
UNIQUE CHARACTERISTICS Mandibular First Molar – Occlusal View
! The outline form is described as:
“ a _____
“ a _____
pentagon
hexagon
UNIQUE CHARACTERISTICS Mandibular First Molar – Occlusal View
! The crown tapers _____
“ smaller M-D dimension on the _____ surface
lingually
lingual
UNIQUE CHARACTERISTICS Mandibular First Molar – Occlusal View
! The M contact area is located _____l to the center of the crown
! The D contact area is located _____ to the center of the crown
“ _____ to the M contact
buccal
buccal
lingual
UNIQUE CHARACTERISTICS Mandibular First Molar – Occlusal View
! The cusp size (from largest to smallest) :
“ _____
“ _____ = _____
“ _____
“ _____
MB ML DL DB D
UNIQUE CHARACTERISTICS Mandibular First Molar – Occlusal View ! There are three fossae: " \_\_\_\_\_ " \_\_\_\_\_ " \_\_\_\_\_
central
mesial
distal
UNIQUE CHARACTERISTICS Mandibular First Molar – Occlusal View
! There are _____ major grooves present:
“ _____
“ _____
“ _____
“ _____
! The central groove has a _____ M-D form
4 central MB DB L zigzag
UNIQUE CHARACTERISTICS Mandibular First Molar – Occlusal View
! The triangular ridges of the MD and ML cusps and
DB and DL cusps meet to form _____ transverse ridges**
! D cusp has _____ triangular ridge
2
lone
UNIQUE CHARACTERISTICS Mandibular First Molar–Distal View
! The D marginal ridge is located more _____ than the M marginal ridge
cervical
UNIQUE CHARACTERISTICS Mandibular First Molar–Distal View
! The _____ root is rounder in cross-sectional form than the _____ root
distal
mesial
UNIQUE CHARACTERISTICS Mandibular First Molar– Lingual View
! The greater height of the _____ cusps hide the _____ cusps from view
lingual
buccal
UNIQUE CHARACTERISTICS Mandibular First Molar– Lingual View
! The mesiodistal dimension of the mesiolingual cusp is often slightly greater than the _____ cusp
distolingual
Mandibular Second Molar
Eruption: _____
11-13 years
UNIQUE CHARACTERISTICS Mandibular Second 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
UNIQUE CHARACTERISTICS Mandibular Second Molar–
Buccal View
_____ Buccal cusps:
! The _____ cusp is the larger, wider, and higher B cusp
! There is one buccal _____ separating the cusps.
“ The buccal groove may end in the _____ of the crown with a _____
2
MB
developmental groove
middle
UNIQUE CHARACTERISTICS Mandibular Second Molar–
Buccal View
! The M contact area is located at the junction of the _____ and _____ thirds
! The D contact is located in the _____ third
“ _____ occlusogingivally
“ _____ to the mesial contact
occlusal middle middle centered cervical
UNIQUE CHARACTERISTICS Mandibular Second Molar– Buccal View ! There are two roots that are \_\_\_\_\_ " Mesial - \_\_\_\_\_ pulpal chambers " Distal – \_\_\_\_\_ chamber ! The M root slightly \_\_\_\_\_ than the D root ! The root tips are relatively \_\_\_\_\_ to each other
almost the same length 2 1 longer parallel
UNIQUE CHARACTERISTICS
Mandibular Second Molar– Mesial View
! The B-L crown dimension is _____ than the O-C crown dimension
! The shape from the proximal views is a _____
greater
rhomboid
UNIQUE CHARACTERISTICS
Mandibular Second 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
cervical
middle
UNIQUE CHARACTERISTICS Mandibular Second Molar– Mesial View ! The \_\_\_\_\_ root is wider B-L " Contains the \_\_\_\_\_ pulpal canal " Contains the \_\_\_\_\_ pulpal canal
mesial
MB
ML
UNIQUE CHARACTERISTICS Mandibular Second Molar – Occlusal View
! The M-D crown dimension is _____ than the buccolingual crown dimension **
! The greatest B-L dimension is in the _____ cusp area
greater
MB/ML
UNIQUE CHARACTERISTICS Mandibular Second Molar –
Occlusal View
! The outline form is _____
square
UNIQUE CHARACTERISTICS Mandibular Second Molar – Occlusal View
! The M contact area is located _____ to the center of the crown
! the D contact area is located at the _____ of the crown
“ _____ to the M contact
buccal
center
lingual
UNIQUE CHARACTERISTICS Mandibular Second Molar –
Occlusal View
! The cusp size (from largest to smallest):
“ _____
“ _____
“ _____
“ _____
MB
ML
DB
DL
UNIQUE CHARACTERISTICS Mandibular Second Molar – Occlusal View ! There are three fossae: " \_\_\_\_\_ " \_\_\_\_\_ " \_\_\_\_\_
central
mesial
distal
UNIQUE CHARACTERISTICS Mandibular Second Molar –
Occlusal View
! There are 3 major grooves present:
“ _____
“ _____
“ _____
! The central groove forms a _____ with the buccal and lingual grooves
central
buccal
lingual
+ pattern
UNIQUE CHARACTERISTICS Mandibular Second Molar – Occlusal View
! The triangular ridges of the MB and ML cusps and DB and DL cusps meet to form _____
2 transverse ridges
UNIQUE CHARACTERISTICS Mandibular Second Molar–
Distal View
! The distal marginal ridge is located more _____ than the mesial marginal ridge
cervical
UNIQUE CHARACTERISTICS Mandibular Second Molar–
Distal View
! The cross-sectional form is similar to the _____
mandibular first molar
UNIQUE CHARACTERISTICS Mandibular Second Molar–
Lingual View
! The _____ cusp is less high than the _____ cusp
! The M-D dimension of the _____ cusp is slightly greater than the _____ cusp
DL
ML
MB
ML
Mandibular Third Molar
Eruption: _____
17-21 years