Dental Morphology Flashcards
2nd tallest CROWN in mouth
Mx CI
1st tallest CROWN in mouth
Mn Canine
3rd tallest CROWN in mouth
Mx Canine
All permanent incisors erupt with…
3 mamelons
Canines or primary incisors do not erupt with…
mamelons
I Just Jacked Michael Jackson’s Moped
Contacts from Mx CI to Canine
IJ - JM - JM
J = j(x) I & M
Least likely to have a divided pulp canal
Mx CI Root
Lends itself well to rotation w/ extraction forceps during surgical removal
Mx CI Root
M & D pulp horns are more likely to be found in…
Mx CIs
In X-section – root is triangular with base of triangle located faciallly, apex located lingually, MESIAL SIDE LONGER THAN DISTAL SIDE
Mx CI Root
T/F, Mx CI has narrowest incisal/occlusal embrassure of ALL Mx teeth
TRUE
T/F, Of all teeth - the GREATEST INCISAL CURVATURE of a cervical line [CEJ] is on the MESIAL SURFACE of Mx Centrals (more so than Mn Centrals)
TRUE
Which anterior tooth has the LONGEST and WIDEST crown?
Mx CI
Anatomical features include cingulum, mamelons, marginal ridges, cervical ridges, triangular ridges, and cuspal ridges
FALSE. Missing lingual ridges and lingual fossa and lingual ridge
Triangular ridges or cuspal ridges do not exist
T/F, Incisal ridge of Mx CI crown is on line with the CENTER OF THE ROOT
TRUE
T/F, Mx CI prominent cingulum located off-center towards the DISTAL
TRUE
Which tooth has the greatest axial inclination relative to the occlusal plane?
Mx CI
Which is least likely to have a divided pulp canal?
Mx CI
Which tooth in mouth shows the least anatomy?
Mn CI (lingual is smooth and nearly lacking in any anatomy)
Smallest permanent tooth
Mn CI
Narrowest mesio-distally tooth
Mn CI
Most symmetrical tooth
Mn CI
Smallest facial embrasure in the mouth
Mn CI – may be the same size as the lingual embrasure, making it an EXCEPTION to the rule that lingual embrasures are always larger than facial
Lingual embrasures are always larger than facial embrasures
Mostly TRUE for all teeth, untrue with Mn CI
First SUCCADANEOUS tooth (meaning it replaces primary teeth)
Mn CI
6 year molars are the 1st permanent teeth, BUT do not qualify as “succedaneous”
They do not replace primary teeth
The Mn CI is the only mandibular anterior which has both its mesial and distal contact points at the same level.
TRUE. Mandibular lateral as M/D contact points in the incisal third but the distal contact point is LOW in the incisal third
The incisal edge is lingual to the long axis of the tooth, so from an incisal view less of the lingual side is visible than the facial surface
Mn CI - weird way of saying = incisal ridge slightly lingual of the faciolingual bisector
Shortest rooth
Mn CI
40% have 2 canals or double PDL spaces
Mn CI
Most common lower anterior with multiple CANALS
Mn CI (40% have 2 canals/double PDL space)
Most likely anterior with multiple ROOTS/bifurcated
Mn Canine
Flat mesio-distally and a distal concavity
Mn CI root
The pulp appears narrower from the facial view than from the interproximal view.
Mn CI root
A cross-section at midroot of a permanent Mn CI is likely to show that the pulp cavity is flattened mesio-distally.
TRUE
When viewed from the incisal - mesial and distal outlines are asymmetrical
Mx Canine occlusal outline
Longest tooth
Mx Canine
Longest root
Mx Canine
Longest Crown
Mn Canine
2nd Longest Crown
Mx CI
3rd Longest Crown
Mx Canine
Tooth is wider faciolingually (FL) than mesiodistally (MD)
Mx Canine
Largest faciolingual dimension of all ANTERIOR teeth
Mx Canine
*Anterior = key word; posterior teeth can be bigger
Widest mesiodistally are
Mx CIs and CLs
Wider mesiodistal dimension of the crown on the facial than the lingual
Mx Canine
Occlusal outline is asymmetrial
Mx Canine
Mx Canine for crown size?
3rd place
No mamelons/4 lobes
Mx Canine
Does not have lingual fossa; has a lingual ridge which splits the lingual fossa into the mesial fossa and distal fossa
Mx Canine
No developmental depressions on the lingual
Mx Canine, developmental depressions are on the facial
The structure immediately mesial to the distolingual (DL) fossa is the lingual ridge
Mx Canine
The structure immediately distal to the mesiolingual (ML) fossa is the lingual ridge
Mx Canine
The mesial and distal fossae meet the proximal surfaces of the tooth that the mesial and distal marginal ridges
Mx Canine
The structure immediately mesial to the mesiolingual fossa is the mesial marginal ridge
Mx Canine
The facial cusp has a mesial cusp slope that is shorter than the distal cusp slope.
TRUE FOR ALL TEETH, EXCEPT…. PRIMARY Mx Canine and permanent Mx 1st PM
Cusp tip may be centered or slightly facial of the faciolingual long axis bisector
Mx Canine
From an incisal view, which surface is more visible on a Mx Canine?
Lingual more visible- because the cusp tip of Mx canines are slightly facial
Longest root
Mx Canine
Pulp cavity has its widest dimension faciolingually in the cervical third of the crown.
Mx Canine
Mx canine pulp cavity has its widest dimension faciolingually in the…
Cervical third of the crown
Canine eminance
Roots of the Mx canines dictate alveolar wall morphology, although they are under bone
Least likely tooth to have 2 roots among canines and PM
Mx canine
Pulp cavity in M/D section is pointed at its incisal limit
Mx Canine
Pulp cavity in M/D section of Mx Canine is _____ at its incisal limit
POINTED
Least likely to be extracted
Mx canine - due to long root
Has 3rd longest crown
Mx canine - behind the Mx CI and Mn Canine
Most prominent labial ridge
Canines
Longest root
Mx canine
Longest tooth inciso-apically
Mx canine
Widest anterior tooth bucco-lingually
Mx canine - all posterior teeth are wider buccolingually especially the Mx 1st Molar ( = widest in the mouth)
Mx canine B/L outline
Pentagonal
Mx canine M/D outline
Triangular
Mx canine incisal
Diamond + asymmetric
Mx canine M contact pt
J(x) (I & M)
Mx canine D contact pt
Middle
Lingual ridge
Mx canine
Mn CI M/D outline
Triangular
Mn CI B/L outline
Trapezoidal
Mn CI mesial contact pt
Incisal
Mn CI distal contact pt
Incisal
Mn LI distal contact pt
LOW inscisal
Mn CI root is _____ with a mesial and distal concavity.
flat mesiodistally
Mx CI M/D outline
Triangular
Mx CI B/L outline
Trapezoidal
Mx CI occlusal outline
Triangular
Mx CI mesial margine
Straight, nearly parallel to the rooth
Mx CI distal margin
Rounded (more convex) and shorter
Mx CI mesial contact pt
Incisal
Mx CI distal contact pt
J(x) (I & M)
Mn LI F/L outline
Trapezoidal
Mn LI M/D outline
Triangular
Mn LI incisal outline
Oval
Has incisal edge that appears twisted on its apex (as it goes from mesial to distal, it curves lingually)
Mn LIs
The incisal edge follows the arch curvature in relation to the faciolingual axis
Mn LIs
Can see the distal marginal ridge (DMR) from the mesial view
Mn LIs
Wear facets of the incisal edges of the Mn LIs are caused by occlusion with…
Mx CI and Mx LI
Lingual cervical line is positioned more apically than facial cervical line
Mn LIs
Mx LI has lingual cervical line positioned more ____ than facial cervical line
apically
Most likely incisor to have 2 canals and 2 roots
Mn LI
Mn 1st PM occlusal outline
Diamond
Smallest premolar
Mn 1st PM (smaller than Mn 2nd PM - EXCEPT in crown height)
Largest premolar
Mx 1st PM
Lingual cusp is small, resembles cingulum
Mn 1st PM
From an interproximal view, the facial cusp appears centered over the long axis; the non-f(x) lingual cusp tip is in line with the lingual surface of the root
Mn 1st PM
Mn 1st PM, mesial lingual developmental groove makes mesial marginal ridge (MMR) run at a
45 degree angle
MesioLINGUAL developmental groove
Mn (near tongue) 1st PM
Only posterior tooth that has a HIGER DISTAL marginal ridge than mesial marginal ridge
Mn 1st PM
More occlusal surfaces can be seen from the mesial than from the distal (Mesial marginal ridge sits lower to the 45 degree angle)
Mn 1st PM
SNAKE EYES
Mn 1st PM
Only PM that as a buccal cusp with triangular ridge, so uniquely prominent as to frequently separate its mesial pit from its distal pit
Mn 1st PM
Has buccal cusp w/ triangular ridge
Mn 1st PM
Groove originates in an occlusal pit and extends onto a proximal surface (mesial)
Mn 1st PM
No central groove, may have central pit
Mn 1st PM
Mesiolingual developmental groove
Mn 1st PM - mesial view
Broader facially than lingually
Mn 1st PM
Frequently seen with a slight concavity on the mesial and distal surface
Mn 1st PM
Not flattened faciolingually
Mn 1st PM
A bifurcation is the most common root anomaly on
Mn 1st PM
Most common root anomaly on Mn 1st PM
Bifurcation
Usually free of marked distal curvature
Mn 1st PM
During ENDO on #21, you suspect a 2nd canal, most likely on the buccal of lingual?
If a 2nd pulp canal is present, it is most likely found lingual to the 1st canal.
Only tooth with its MMR at a grossly different angle than its DMR
Mn 1st PM - 45 degree angle, LOWER, due to mesiolingual developmental groove
Smallest premolar
Mn 1st PM
Narrowest and smallest root of all the premolars
Mn 1st PM
Most prominent transverse ridge of all the premolars without central groove
Mn 1st PM
Only tooth with a mesio-lingual groove from the occlusal to the lingual
Mn 1st PM
Tilted lingually
Mn 1st PM
Gingival papilla is shortest between the Mn 1st and 2nd PM
TRUE
Mn 2nd PM B/L outline
Pentagon
Mn 2nd PM M/D outline
Rhomboid
Mn 2nd PM occlusal outline
Pentagon
Lingual HOC in occlusal third
Mn 2nd PM
Types of Mn 2nd PM
2 cusp VS. 3 cusp
2 cusp Mn 2nd PM occlusal
Crescent = groove pattern forms either H or U
Which PM is most likely to exhibit a crescent shaped central developmental groove?
Mn 2nd PM
More common type of Mn 2nd PM
3 cusp type
3 cusp Mn 2nd PM # pulp horns
3
3 cusp Mn 2nd PM occlusal table
Square, groove form a “Y” – bottom of Y makes lingual groove
Occlusal outline VS. Occlusal table for Mn 2nd PM
Occlusal outline: Pentagon
Occlusal table: Square
Largest cusp in Mn 2nd PM
B > ML > DL
of lobes for 3 cusp type Mn 2nd PM
5
3 cusp type Mn 2nd PM, frequently has ___ pit
Central
Only PM that may exhibit 3 pits
Mn 2nd PM
SAME total # of pits on the occlusal surface of Mx M1
3, Mn 2nd PM
Which of the following teeth have the same # of pits as the Mx M1
3 cusp type, Mn 2nd PM
If the Mn 2nd PM is congenitally missing, the roots of the primary Mn 2nd PM will not be resorbed and the primary tooth may be retained.
TRUE
Only PM with no mesial root depression
Mn 2nd PM
Close to mental foramen
Mn 2nd PM
PM most likely to be congenitally missing
Mn 2nd PM
PM most likely to have a central pit
Mn 2nd PM, 3 cusp type
PM most likely to have 1 root and 1 canal
Mn 2nd PM
Root is closest to the mental foramen and is longer than the 1st PM
Mn 2nd PM
Mental foramen is located most closely to…
Mn 2nd PM
Mx PMs have roots that are longer than incisors but shorter than canines
TRUE
Mx PMs have crowns that are shorter than canines but longer than molars
TRUE
Crown height decreases as you go posterior
TRUE
Like all Mx posteriors, they have a trapezoidal shape when viewed interproximally
TRUE
They have inciso-gingival contact points in the middle third
TRUE
** Questions are more heavily weighted towards the Mx 1st PM VS. Mx 2nd PM
Important Test Taking Tip, if you don’t know the answer choose Mx 1st PM
Mx 1st PM B/L outline
Pentagonal
Mx 1st PM M/D outline
Trapezoidal
Mx 1st PM occlusal outline
Hexagon w/ unequal sides; kinda looks like a kidney bean in cross-section DUE TO the mesial concavity
Largest of all PMs
Mx 1st PM
PM or molar tooth with greatest cervico-occlusal crown height
Mx 1st PM
cusps on Mx 1st PM
2 = 1 buccal, 1lingual
Lingual cusp is typically 1.0 mm shorter than the facial cusp
Mx 1st PM
Buccal cusp is slightly to the distal
Mx 1st PM
PM where mesial cusp ridge is longer than distal cusp ridge (B cusp slightly to distal)
Mx 1st PM (so does primary maxillary canine)
Mx 1st PM occlusal view
Long central groove, few supplemental grooves
Mesial marginal ridge developmental groove that moves onto the root surface (also a mesial concavity)
Mx 1st PM
Mesial marginal ridge is taller than distal marginal ridge ( = the DMR is more cervical than the MMR)
Mx 1st PM
roots for Mx 1st PM
2 pulp horns, 2 roots (bifurcate halfway down), 2 canals
Canals for Mx 1st PM
Lingual canal is bigger than facial canal
Largest PM
Mx 1st PM
Has a concavity in its crown gingival to the mesial contact area
Mx 1st PM
On facial cusp, has a longer mesial cusp slope than distal cusp slope
Mx 1st PM (so does primary Mx canine)
Has mesial marginal ridge developmental groove
Mx 1st PM
Lingual cusp is to the mesial
Mx 1st PM
Has the shape of a kidney in cross-section
Mx 1st PM
Bifurcates halfway down the root
Mx 1st PM
Has the greatest demarcation between the pulp chamber and the pulp canals
Mx 1st PM
Lingual cusp is the sam height as the facial cusp
Mx 2nd PM (unlike Mx 1st PM)
No concavity on the crown
Mx 2nd PM
Instead of a long central groove w/ few supplemental grooves, it has a short central groove w/ a lot of supplemental groves that make it look wrinkly.
Mx 2nd PM
WRINKLY occlusal anatomy
Mx 2nd PM - Instead of a long central groove w/ few supplemental grooves, it has a short central groove w/ a lot of supplemental groves that make it look wrinkly.
The mesial cusp slope is shorter than the distal cusp slope
Mx 2nd PM
The Mx 2nd premolar has 1 root and 50% have 2 canals
TRUE
Mx 2nd PM B/L outline
Pentagonal
Mx 2nd PM M/D outline
Trapezoid
Mx 2nd PM occlusal outline
Rounded hexagon
Smaller than the Mx 1st PM
Mx 2nd PM
Buccal lingual cusps are same height
Mx 2nd PM
Lingual cusp is 1 mm shorter than buccal cusp
Mx 1st PM
Mn Canine B/L outline
Pentagonal
Mn Canine M/D outline
Triangular
Mn Canine incisal outline
Diamond/oval
Mn Canine viewed form the proximal, the facial outline is made up of:
One continuous arc & differs from the outline of a Mx canine = Mx canine has 3 planes
of planes on Mn canine
3
Mn Canine viewed from the facial, the mesial outline from the contact area to the root apex….
Relatively straight, mesial axial surface is almost parallel to the long axis of the tooth
Mn canine mesial contact pt
Incisal
Mn canine distal contact pt
Middle
Longest crown
Mn canine
2nd longest tooth
Mn canine (Mx canine is longest)
2nd longest root
Mn canine (Mx canine is longest)
FL measurement > MD measurement
Mn and Mx canine
Canine relatively flat in the fossa area, poorly developed in the marginal ridge and cingulum area
Mn canine
Cusp tip lingual to the faciolingual long axis bisector
Mn canine
From an incisal view of Mn canine, which surface is more visible?
Facial
ONLY tooth with root inclined mesially
Mn canine
Anterior tooth most likely to have a bifurcated root
Mn canine (more often than Mx canine, Mx center, L root of Mx M1, DB root of Mx M2)
Mx M1 B/L outline
Trapezoid
Mx M1 M/D outline
Trapezoid
Mx M1 occlusal outline
Rhomboid
Mx M1 acute angles
DL (smallest cusp) and MB
Mx M1 obtuse angles
DB and ML (largest cusp)
4 f(x) cusps + cusp of Carabelli
Mx M1
3 pits - mesial, central, distal
Mx M1 (Mn 2nd PM, Y type also has 3 pits)
of cusps for Mx M1
4 f(x) + cusp of Carabelli; but, 5 lobes
of pits for Mx M1
3 pits - mesial, central, distal
of grooves for Mx M1
4 grooves
Lingual groove Mx M1
Extends onto occlusal and becomes the distal oblique groove; ends in distal pit; in middle of tooth on Mx 2nd & 3rd, it is more positioned distally)
Central groove Mx M1
Runs from mesial pit to central pit
Mx M1 mesial border of the oblique ridge
Mesial pit
Cusp of Carabelli
Mx M1, lingual side of mouth; lingual to ML cusp
of lobes Mx M1
5 lobes
Teeth that form from 5 lobes
Mx M1
Mn M1
Mn 2nd PM, 3 cusp type “Y”
Only tooth with 2 triangular ridges on one cusp
Mx M1
Mx M1 - ridge head down the cusp to the central groove, where it meets the triangular ridge from the mesio-buccal cusp to form the…
Transverse Ridge
Mx M1 - triangular ridge heads down the mesiolingual cusp to meet the triangular ridge of the distobuccal cusp and forms the…
Oblique Ridge (oDBML)
DBML
The transverse groove of the oblique ridge connects..
the distal fossa and central fossa
Occlusal surface usually distinctly divided by a ridge from the ML to the DB cusp
Oblique Ridge
Forms the distal boundary of the central fossa in Mx M1
Oblique Ridge*
Passes through the DF sulcus (or angular sulcus) of the permanent Mn M1
Oblique Ridge
Opposes the developmental groove between the DF and distal cusps of Mn M1
Oblique Ridge
Same height as marginal ridges in Mx M1
Oblique Ridge
4 f(x) cusps, but only 3 form cusp triangle
MB, ML, DB
DL cusp gets progressively smaller on Mx M2 and M3
Found on all Mx molars
Cusp triangle (MB, ML, DB)
Mx M1 cusp size
ML > MB > DL (but gets smaller more posteriorly) > DB
Largest and longest cusp of any Mx molar tooth
ML cusp (also, cusp of Carabelli adds to size)
Mx M - ML cusp tip located ___ to the MB cusp tip
Distal
Mx M - DB cusp tip located ___ to the MB cusp tip
Lingual
Mx M - Transverse ridge is up and down like a T
Made of ML and MB
of roots in Mx M1
3 roots
Mx M1 root length
P (longest) > MB (widest faciolingually, MB2 canal) > DB
Only root in the mouth with both facial and lingual concavity
Mx M1 Palatal Root
Longest Mx M1 root
Palatal
Widest faciolingual root of Mx M1
MB root
Mx M1, when viewed form the buccal, in line with buccal groove
Palatal root
Mx M1, when viewed form the lingual, in line with the midpoint of MD diameter
Palatal root
of pulp horns for Mx M1
4 pulp horns
Mx M1 distance of furcations from cervical line
M (shortest)
Only tooth that is wider lingually than facially
Mx M1
The widest tooth faciolingually
Mx M1
The only tooth with 2 triangular ridges on 1 cusp (the mesio-lingual cusps)
Mx M1
Has a concavity on the distal surface of its crown
Mx M1
*hard to adapt matrix band
Roots are closest to the maxillary sinue
Mx M1
Mn M1 B/L outline
Trapezoid
Mn M1 M/D outline
Rhomboid
Mn M1 occlusal outline
Pentagon
cusps Mn M1
5 cusps (3 buccal, 2 lingual)
pulp horns Mn M1
5 pulp horns
Mn M1 largest cusp
MB
Mn M1 2nd largest cusp
ML
Is the largest proximal crown surface of a Mn M1 mesial or distal?
Mesial of Mn M1
Mn M1 smallest cusp
D (distal cusp projects into the distal fossa of Mx M1)
Distal cusp of Mn M1 projects into the..
distal fossa of Mx M1
Mn M1 lingual cusps are __ and more __ than buccal cusps
higher; pointed
All 5 cusps viewable from the facial
Mn M1
of triangular ridges Mn M1
5
of grooves on Mn M1
4 grooves (1 central, 2 buccal [B and DB], 1 lingual)
Buccal groove of Mn M1 separates..
MB and DB cusps
Mn M1 DF groove separates DF and distal cusps
** Don’t mix distal with distofacial
THERE IS NO DISTAL GROOVE, only A DISTOFACIAL/DISTOBUCCAL GROOVE
Which developmental groove is between the distofacial cusp and the distal cusp of Mn M1?
Distofacial groove
of developmental grooves distinguishing Mn M1 from Mn M2?
4 = Mn M1 3 = Mn M2
Of all the molars, the mesial fossaa of the Mn M1 is most distinctly separated by the remainder of the occlusal table by a…
Transverse ridge
Don’t be tricked by Oblique Ridge (only on Mx M)
MD dimension (slightly) ___ BL dimension in Mn M1
Greater than; the Mn M1 is 1mm wider mesiodistally than faciolingually
5 cusps with 3 cusps on the buccal
Has longest MD measurement of all permanent molars
Mn M1
f(x)ing cusps on Mn M1
5 cusps
of pulp horns on Mn M1
5 pulp horns
of roots on Mn M1
2 roots
canals Mn M1
3 canals (2 in MB*)
Roots incline ____ in Mn M1
distally
Pulp CHAMBER (not canal) is ___ MD than FL in Mn M1
wider
Mesial root of Mn M1 is typically very thin MD, much wider FL, and concave on both M & D surfaces
TRUE
Mn M1 mesial root has a strong distal curvature in the apical 1/3rd
TRUE
Mn M1’s biggest and straightest canal
Distal root
of canals in Mn M1 mesial root
2, very small
Primary teeth have thinner (1 mm VS. 2.5 mm) whiter, less calcified enamel that is more uniform in depth than the enamel of permanent teeth
TRUE
Primary teeth are smoother with less pits and grooves
TRUE
In primary teeth, enamel stops abruptly at
CEJ
Primary teeth buccal and lingual surfaces are flatter above the HOC
TRUE
Deciduous/primary teeth have enamel rods which go from the
DEJ occlusally (permanent teeth have rods directed gingivally)
Primary teeth have bigger cervical bulges (especially the M1s)
TRUE - more bulbous, CEJ more obvious (dips gingivally)
Primary teeth have ____ root trunks
Shorter; may be absent
Primary teeth have roots which are more flared/divergent and skinny
TRUE - gotta make room for developing succadenaous teeth
Primary dentition: fewer molars and NO premolars
2 VS. 3 molars
Primary teeth have proportionately _____ pulp cavities than permanent teeth
Larger; think that they don’t have much time to develop secondary and tertiary dentin
Primary teeth have ___ DEJ
thinner; thus, easier to have pulp exposure
Primary teeth have more prominent pulp horns that extend closer to cusp tip
True - long and pointed
Primate spaces: Maxillary
Btwn lateral & canine
Primate spaces: Mandibular
Btwn canine & 1st molar
Only incisory in both dentitions with MD diameter > height
Primary Mx Centrals
Wider MD & shorter incisocervically than permanent teeth
Primary Mx Centrals
Which tooth has prominent labial and lingual cervical ridges?
Primary Mx Centrals
AFJLT?
Mesial cusp ridge longer than distal cusp ridge
Primary Mx Canine (opposite of perm Mx canines)
Which other permanent tooth also has a mesial cusp ridge longer than distal cusp ridge (primary mx canine)?
Mx 1st PM
Longer and sharper cusp than the permanent
Primary Mx Canine – makes sense because it hasn’t been worn down at all
Crown somewhat resembles a permanent PM, but the root form is typical of a permanent molar (3 roots)
Primary Mx M1 (distal half very small, if you knock it off, it looks like a PM)
Does not a have a straight cervical line
Primary Mx M1
CEJ dips more on the mesial half than the distal half
Primary Mx M1
roots for Primary Mx M1
3 roots
Primary Mx M1 Occlusal pit-groove area
H-shaped
Looks like Mx M1
Primary Mx M2 (it also has a Cusp of Carabelli, oblique ridge, transverse ridge, DL groove)
Last primary tooth to erupt
Primary Mx M2
Permanent Mx M1
Deciduous Mx M2
Has greatest FL dimension of all primary teeth
Primary Mx M2
Unlike any other tooth
Primary Mn M1
Has prominent transverse ridge distinctly separating the mesial portion from the remainder of the occlusal table
Primary Mn M1
Most difficult tooth to restore; Class II very difficult because of prominent MMR
Primary Mn M1
of cusps in primary Mn M1
4 cusps = 4 pulp horns (dont’ think that it has just because Mn M1 has 5); also, ML cusp is highest and sharpest
of cusps in Mn M1
5 pulp horns
Prominent MB bulge + cervical ridge
Primary Mn M1
S-shaped cervical ridge
Primary Mn M1
Which primary tooth has the CEJ apically positioned on the mesial 1/3 of the crown?
Primary Mn M1
Which side of the primary Mn M1 is apically positioned?
Mesial side
Closely resembles permanent Mn M1 occlusally, EXCEPT MB, DB and distal cusps are nearly equal in size
Primary Mn M2
What is the easiest way to distinguish between Primary Mn M2 and Mn M1 (these get smaller)?
Compare size of distal cusps; distal cusp is relatively much bigger in the primary
of cusps in primary Mn M2
5 cusps
Of the primary molars, which tooth bears the greatest resemblance to a PM?
Primary Mx M1
Which primary tooth has a facial cervical ridge which is so distinctly prominent that it is uniquely different from ALL other teeth?
Primary Mn M1
Which tooth has an H-shaped occlusal pattern?
Primary Mx M1
Which tooth typically has a transverse ridge, oblique ridge, and a DL groove
Primary Mx M2
Which tooth would be most difficult to do an MO?
Primary Mn M1
Which primary mandibular molar has 5 cusps?
Primary Mn M2
Which tooth has prominent labial and lingual cervical ridges?
Primary Mx Centrals
