Boards - Dental Anatomy Compendium Flashcards
Primary dentition quadrant formula
Permanent dentition quadrant formula
i 2/2 c 1/1 m 2/2
I 2/2 C 1/1 P 2/2 M 3/3
Contact areas for Maxillary Anterior teeth:
Mandibular Anterior teeth:
IJ JM JM
II II IM
Generally, the proximal contact area of all Posterior Teeth is located where?
The _______ contact is more occlusally positioned.
The contacts are ______ shaped and are slightly wider in a ______ dimension.
Middle 1/3 occlusocervically
mesial
ovoid, faciolingual
What are the 2 exceptions the the Generalities of Proximal contacts of Posterior teeth?
Mand 1 PM - mesial contact cervical to distal
Molars (Max and Mand) mesial contact = J
*J - junction occlusal and middle 1/3
Contact areas for Max Posterior teeth:
Contact areas for Mand Posterior teeth:
MM MM JM JM JM
MM MM JM JM JM
All teeth have proximal contact in the middle 1/3 faciolingually, with the exception of ______ teeth, which are located more facially.
Posterior
The Facial Heights of Contour are generally at the _______ of the crown.
What teeth have Facial Heights of Contour a little more occlusally (junction of Cervical and Middle 1/3)?
Cervical 1/3
Mandibular Molars
Facial Heights of Contour, aka…
Cervical Ridges
On what teeth are Facial Heights of Contour (cervical ridges) most prominent?
Where are they least prominent?
Mandibular Posterior
Mandibular Anterior
Anterior teeth have Cervical Ridges on both facial and lingual sides located where?
Cervical 1/3 all around
Posterior teeth have lingual Heights of Contour located where?
Exception? Where?
Middle 1/3
Mand 2 PM - Occlusal 1/3
The CEJ, aka cervical line goes ______ proximally
incisal/occlusal
The CEJ dips more on the ______ teeth
Dips more on what proximal surface?
Dips more on the Max or Mand teeth?
Anterior
Mesial
Maxillary
The most severe curvature of the CEJ is seen where?
The lease curvature?
Mesial Max CI’s
Distal Mand 3M
4 Embrasures around every tooth:
Occlusal
Gingival
Lingual
Facial
Generally, the facial/lingual embrasure is larger on permanent teeth.
Lingual
What are the 3 exceptions to Lingual embrasures being larger?
Max 1M
Mand 2 PM - 3 cusp variety
Mand CI’s - facial/lingual equal
List Incisal Embrasures largest to smallest: (6)
Max LI and Canine
Mand LI and Canine
Max CI and LI
Max CI’s
Mand CI and LI
Mand CI’s
Where is the largest Occlusal Embrasure?
Max Canine and 1st PM
When is the 1st evidence of in utero calcification?
When is the calcification of Crowns complete?
2nd Trimester/14 weeks
11 months (Max 2M)
_______ teeth usually erupt before their counterparts
*both primary and permanent
Mandibular
What are the 1st teeth to erupt?
What are the last?
Mand CI’s (10 months)
Max 2M (29 months)
When do all the roots complete formation?
What is the last to complete?
39 months
Max canines
What are the 1st permanent teeth that initiate calcification?
When does this occur?
1st Molars
After birth
Mandibular teeth usually erupt before Maxillary with what exception?
Max 2 PM
*erupt same/before Mand 1 PM
What are the 1st permanent teeth to erupt?
When does this occur?
1st Molars
6 years
*mixed dentition
What are the 1st succedaneous permanent teeth to erupt?
When?
Mand CI’s
6-7 yrs
What are the last succedaneous permanent teeth to erupt?
Max canines
What are the last teeth to initiate calcification, complete crown formation, and erupt?
When does the initiation of calcification begin?
3rd Molars
9 yrs
From the facial/lingual view, all teeth are what shape?
Trapezoidal
*short side gingival
From the Proximal view, the Anterior teeth are what shape?
The Max posterior?
The Mand posterior?
Triangular
Trapezoidal (short side occlusal)
Rhomboidal
If the Maxillary incisor is bisected over the long axis of the tooth where is the icisal edge?
Centered
If the Canine is bisected along its long axis (mesiodistal line), the cusp tip is located where?
*Where is it never?
Centered or facial
*Never lingual
If the Mandibular Incisors are bisected along the long axis of the tooth, where is the incisal edge?
Mandibular Canines?
Lingual
Lingual
Teeth with one facial cusp (canine, PM’s), what cusp ridge is generally shorter?
What are the 2 exceptions?
Mesial
Max 1 PM / Primary Max Canine
The crowns of teeth tend to get shorter from the ______ to the ______
Canine
3rd Molar
All teeth develop from ___ lobes.
What are the 3 exceptions?
4
Max 1M, Mand 1M, 3-cusp Mand 2PM
*5 lobe exceptions
T/F
Generally, the mesial portion of a tooth is better developed and measures more occlusocervically as well as cervicoapically than does the distal portion
True
When comparing within tooth classifications (molars, premolars, etc), the more _____ the tooth, the more likely supplemental (tertiary) anatomy is present
Posterior (distal)
Where is the largest cusp on the Molars?
Where is that on the Maxillaries?
Mandibular?
Mesial supporting cusp
ML
MF
The roots of all teeth are inclined _______
distally
If a single root has 2 canals, where will they be oriented?
Facial
Lingual
Teeth erupt as many pulp horns as there are _____
cusps
What Molar Roots have more than 1 canal and where are they located?
(5 of them)
Max 1M (MF root)
Mand 1M (M root)
Mand 1M (D root 31.6%)
Mand 2M (M root)
Mand 2M (D root 14.9%)
T/F
Maxillary anterior teeth have multiple canals
False
*Max do NOT have multiple canals
What are the 3 Anterior Roots with tendencies for more than 1 canal? (list most to least likely)
Additionally, what do all these teeth have?
Mand canine
Mand LI
Mand CI
***all have M & D root depressions
Describe the canals/roots of the Max PM’s
1st: ALWAYS 2 canals, usually 2 roots (F & L)
2nd: Variant (can have 2 canals, occasionally 2 roots)
What PM is most likely to have one root and one canal?
Mand 2nd
What is the only tooth that has a pulp wider mesiodisally than faciolingually?
Max CI
What shape are the Max CI’s and LI’s when viewed incisally in cross section?
Triangular
*taper faciolingually
Max CI: M-D crown dimension…
M curvature of cervical line toward incisal…
Incisal ridge _____ faciolingually
greatest of Anterior teeth
greatest of ANY tooth
centered
Max LI: M-D crown dimension…
Tooth with most developmental ______
Most ____ located contact area of any incisor
M-D and F-L dimensions _____ than any other anterior tooth
Incisor Ridge ______ faciolingually
smallest of any Maxillary tooth
anomalies
cervically
closer
centered
Mand CI: crown dimensions…
Crown is:
Proximoincisal line angles…
What tooth has similar Proximoincisal line angle?
Proximal contact areas are where?
Incisal edge ______ to faciolingual bisector (all Mand Ant)
smallest of ANY tooth
bilaterally symmetric
sharpest of any tooth
MI line angle Max LI
Both Incisal 1/3 (I)
Lingual
What are 3 unique characteristics shared between Mand CI and LI?
Fewest facial developments/features
smoothest lingual surface contours
least developed cingulum
Mand LI: describe Crown:
MI or DI is sharper?
Twisted on root
MI
Max Canine: Tied in tooth length with what?
Longest what of any tooth?
Greatest ______ dimensions of any Anterior tooth
Has a bulge where?
Cusp tip is centered and never _______
Greatest _______ and _______ prominences of any Anterior tooth
Distal contact area _______ FL and CI
Mand Canine
Root length
Facio-Lingual
Distally
Lingual
Cervical, Facial ridge prominences
Centered
Mand Canine: Tied for longest tooth length with what?
Longest what of any Mandibular tooth?
Longest what of ANY tooth?
What side aligned straight?
Facial crown and root what shape from the proximal?
Cusp tip/incisal edge is to what side of the F-L bisector?
ML and DL fossae borders the lingual ridge and the the ______ cervically
Max Canine
Root length
I-C crown length
Mesial crown/root
C shaped
Lingual (like all Mand Anteriors)
Cingulum
Max 1 PM: Only PM with ____ ridge longer *on facial cusp
Mesial Marginal Ridge has what?
Crown concavity where?
Root depression where?
L cusp ___ mm shorter than F cusp
Deep _____ developmental groove
Mesial
Developmental Groove
Mesial
Mesial
1.0mm
Central
Max 2 PM: More ______ than any other posterior tooth
Cusp heights are closer than any other _____
M and D fossae are very ______ (more than any other posterior tooth)
Bilaterally symmetrical
PM
close
Mand 1 PM: Only tooth that has what developmental groove?
Smallest Posterior tooth in what dimension?
FL and MD dimensions closer than any other Mand tooth, hence _____ shaped
Which proximal contact is more cervical?
From Lingual aspect can see _____ occlusal surface
Mesial marginal ridge sloped lingually ____ degrees and is cervical to Distal marginal ridge
L cusp is small and ______
ML groove
F-L
Diamond
Mesial
Sloped
45 degrees
non-functional (like cingulum)
Mand 2 PM: Two varieties:
3 cusp os the only PM with multiple cusps, develops from how many lobes?
3-cusp only PM with a lingual _____
3-cusp only PM with a central _____
3-cusp, along with Max 1M, only tooth crown does NOT taper_______
3-cusp PM Lingual height of contour where?
3-cusp PM most likely PM to be ______ missing
2 cusp U/H, 3 cusp Y
5 lobes
groove
fossa
Faciolingually (tapers facially)
Occlusal 1/3
Congenitally
Max 1M: Along with the Mand 2PM, the only tooth with what characteristic?
What augments the ML cusp?
Like all Max Molars, has what feature on the occlusal?
Like all Max Molar, 3 Primary cusp triangles:
Distal contact area is ________
Tapers facially (MD lingual greater than MD facial)
Cusp of Carabelli
Oblique Ridge
MF, DF, ML
Centered