Compendium

Question 1

What is the formula for the primary dentition per maxillary/mandibular quadrant?

Answer 1

i 2/2; c 1/1; m 2/2

Question 2

What is the formula for the permanent dentition per maxillary/mandibular quadrant?

Answer 2

I 2/2; C 1/1; P 2/2; M 3/3

Question 3

Where is the mesial contact area (incisocervically) of the maxillary central incisor?

Answer 3

I 1/3 (Remember maxillary teeth IJ JM JM and mandibular teeth II II IM)

Question 4

Where is the distal contact area (incisocervically) of the maxillary central incisor?

Answer 4

J of I and M 1/3 (Remember maxillary teeth IJ JM JM and mandibular teeth II II IM)

Question 5

Where is the mesial contact area (incisocervically) of the maxillary lateral incisor?

Answer 5

J of I and M 1/3 (Remember maxillary teeth IJ JM JM and mandibular teeth II II IM)

Question 6

Where is the distal contact area (incisocervically) of the maxillary lateral incisor?

Answer 6

M 1/3 (Remember maxillary teeth IJ JM JM and mandibular teeth II II IM)

Question 7

Where is the mesial contact area (incisocervically) of the maxillary canine?

Answer 7

J of I and M 1/3 (Remember maxillary teeth IJ JM JM and mandibular teeth II II IM)

Question 8

Where is the distal contact area (incisocervically) of the maxillary canine?

Answer 8

M 1/3 (Remember maxillary teeth IJ JM JM and mandibular teeth II II IM)

Question 9

Where is the mesial contact area (incisocervically) of the mandibular central incisor?

Answer 9

I 1/3 (Remember maxillary teeth IJ JM JM and mandibular teeth II II IM)

Question 10

Where is the distal contact area (incisocervically) of the mandibular central incisor?

Answer 10

I 1/3 (Remember maxillary teeth IJ JM JM and mandibular teeth II II IM)

Question 11

Where is the mesial contact area (incisocervically) of the mandibular lateral incisor?

Answer 11

I 1/3 (Remember maxillary teeth IJ JM JM and mandibular teeth II II IM)

Question 12

Where is the distal contact area (incisocervically) of the mandibular lateral incisor?

Answer 12

I 1/3 (Remember maxillary teeth IJ JM JM and mandibular teeth II II IM)

Question 13

Where is the mesial contact area (incisocervically) of the mandibular canine?

Answer 13

I 1/3 (Remember maxillary teeth IJ JM JM and mandibular teeth II II IM)

Question 14

Where is the distal contact area (incisocervically) of the mandibular canine?

Answer 14

M 1/3 (Remember maxillary teeth IJ JM JM and mandibular teeth II II IM)

Question 15

As a generality, the proximal contact areas (occlusocervically) are positioned in what portion of the crown? What are the exceptions?

Answer 15

Middle 1/3 of the crown occlusocervically. The exceptions include the mesial contact area of the mandibular 1st PM (positioned more cervically than the distal because of a sloped MMR AND the contact areas on the mesial surfaces of maxillary and mandibular molars are located at the JUNCTION of the occlusal and middle 1/3

Question 16

All teeth have faciolingual proximal contact areas located in what portion of the crown?

Answer 16

Middle 1/3 of the crown (however the posterior teeth tend to have theirs positioned slightly more toward the facial)

Question 17

Where are the facial heights of contour for all teeth?

Answer 17

In the cervical 1/3 of the crown (although the MANDIBULAR MOLARS are more correctly described as being at the JUNCTION of the cervial and middle 1/3

Question 18

Facial heights of contour extend in a mesiodistal direction parallel to the cervical line (CEJ) and are also known by what term?

Answer 18

“Cervical ridges”

Question 19

Where are the facial heights of contour most prominent? Where are they the least prominent?

Answer 19

Mandibular posterior teeth and mandibular anterior teeth (respectively)

Question 20

Where do anterior teeth have lingual heights of contour?

Answer 20

cervical 1/3 of the crown

Question 21

Where do posterior teeth have lingual heights of contour? What is the exception?

Answer 21

middle 1/3 of the crown (EXCEPTION: mandibular 2nd PM-the lingual height of contour is said to be at the occlusal 1/3 due to the diminished lingual crown height and cusp size)

Question 22

Where is the most severe curvature of the CEJ (cementoenamel junction aka the cervical line)? Where is the least severe curvature?

Answer 22

Most: Mesial surface of maxillary central incisor; Least: distal surface of mandibular 3rd molar

Question 23

Lingual embrasures are wider than facial embrasures on all permanetn teeth because of faciolingual convergence (generally teeth are wider facially than they are lingually). What are the THREE EXCEPTIONS?

Answer 23

(1) Maxillary 1st molar, (2) the 3-cusp variety mandibular 2nd PM (because the lingual calibration of these two teeth is greater than it is on the facial) and (3) mandibular central incisors because they are described as being the same size.

Question 24

Where is the largest incisal embrasure located?

Answer 24

Between the maxillary lateral incisor and canine

Question 25

Where is the second largest incisal embrasure located?

Answer 25

Between the mandibular lateral incisor and canine

Question 26

Where is the third largest incisal embrasure located?

Answer 26

Between the maxillary central and lateral incisors

Question 27

Where is the fourth largest incisal embrasure located?

Answer 27

Between the maxillary central incisors

Question 28

Where is the fifth largest incisal embrasure located?

Answer 28

Between the mandibular central and lateral incisors

Question 29

Where is the sixth largest (or smallest) incisal embrasure located?

Answer 29

Between the mandibular central incisors

Question 30

Where is the largest overall occlusal embrasure located?

Answer 30

Between the maxillary canine and the first premolar

Question 31

When do primary teeth show first evidence of calcification?

Answer 31

In utero during the 2nd trimester (about 14 weeks)

Question 32

When does calcification of of the last primary crowns finish?

Answer 32

By 11 months (maxillary 2nd molars)

Question 33

What are the first primary teeth to erupt?

Answer 33

Mandibular central incisors (at 10 months)

Question 34

What are the last primary teeth to erupt?

Answer 34

Maxillary 2nd molars (at 29 months)

Question 35

When have all primary roots completed formation?

Answer 35

By 39 months (maxillary canines)

Question 36

What are the first permanent teeth to initiate calcification?

Answer 36

Permanent first molars (initiate calcification after birth)

Question 37

What are the first permanent teeth to erupt?

Answer 37

Mandibular first molars (6 years of age)

Question 38

What are the last succedaneous permanent teeth to erupt?

Answer 38

Maxillary canines

Question 39

What are the last teeth to initiate calcification?

Answer 39

Maxillary 3rd molars (9 years). Also last to complete crown formation and erupt

Question 40

What is the geometric form of all teeth from a facial or lingual view?

Answer 40

TRAPEZOIDAL (with the shorter parallel side oriented cervically)

Question 41

What is the geometric form of anterior teeth from a proximal view?

Answer 41

TRIANGULAR with the apex oriented incisally

Question 42

What is the geometric form of maxillary posterior teeth from a proximal view?

Answer 42

TRAPEZOIDAL with the shorter parallel side oreinted occlusally

Question 43

What is the geometric form of mandibular posterior teeth from a proximal view?

Answer 43

RHOMBOIDAL

Question 44

For teeth with one facial cusp, the mesial cusp ridge is slightly shorter than the distal cusp ridge. What are the exceptions?

Answer 44

(1) Maxillary 1st premolar and (2) primary maxillary canine

Question 45

Nearly all teeth form from 4 developmental lobes. What are the exceptions (3 exceptions form from 5 developmental lobes)?

Answer 45

(1) permanent maxillary 1st molar (2) permanent mandibular 1st molar and (3) the 3-cusp variety mandibular 2nd premolar

Question 46

What is the largest cusp on molars?

Answer 46

The mesial supporting cusps (maxillary molars it is the ML; mandibular molars it is the MF)

Question 47

What are the four single molar roots that tend to have more than one canal?

Answer 47

(1) maxillary 1st molar (MF root), (2) mandibular 1st molar (M root), (3) Mandibular 2nd molar (M root) and (4) distal roots of mandibular 1st (31.6%) and 2nd (14.9%) molars.

Question 48

What are the three single anterior roots with tendencies for more than one canal?

Answer 48

(1) mandibular canine-most likely anterior tooth; has M&D root depressions and is also the anterior tooth most likely to have a bifurcated root (2) mandibular lateral incisor (next most likely, has M&D root depressions), and (3) mandibular central incisor (rare & least likely, has M & D root depressions)

Question 49

Which maxillary anterior teeth have a tendency for more than one canal.

Answer 49

NONE. Maxillary anterior teeth do not have multiple canals

Question 50

How many roots and canals do maxillary first premolars typically have?

Answer 50

Two canals (always) and two roots (usually); F & L, rarely 3 but if so, MF, DF and L

Question 51

How many roots and canals do maxillary second premolars typically have?

Answer 51

variant pulp morphology can have 2 canals and occasionally 2 roots

Question 52

Which premolar is most likely to have one root and one canal?

Answer 52

Mandibular 2nd premolar

Question 53

Which maxillary tooth has the smallest M-D crown dimension?

Answer 53

Maxillary lateral incisor

Question 54

Which tooth has the smallest crown dimension?

Answer 54

Mandibular central incisor

Question 55

Where is the incisal edge of mandibular teeth in relation to the faciolingual bisector?

Answer 55

Lingual

Question 56

Which tooth is known for having a crown that is "twisted" on the root; seen from two views?

Answer 56

Mandibular lateral incisor

Question 57

Which tooth has the longest root length?

Answer 57

Maxillary canine

Question 58

Which anterior tooth has the greatest F-L dimensions?

Answer 58

Maxillary canine

Question 59

Where is the cusp tip of the maxillary canine in relation to the faciolingual bisector?

Answer 59

Centerd (it is NEVER lingual to it)

Question 60

Which anterior tooth has the greatest cervical prominence?

Answer 60

Maxillary canine

Question 61

Which tooth has the greatest I-C crown length of any tooth?

Answer 61

Mandibular canine

Question 62

Which mandibular tooth has the greatest root length?

Answer 62

Mandibular canine

Question 63

Which tooth is the only premolar wth a mesial cusp ridge longer than the distal cusp ridge (facial cusp)?

Answer 63

Maxillary 1st premolar

Question 64

Which tooth is known for having a mesial marginal ridge (developmental groove)?

Answer 64

Maxillary 1st premolar

Question 65

What tooth presents with a unique ML developmental groove?

Answer 65

Mandibular 1st premolar

Question 66

Which tooth has a mesial marginal ridge that slopes lingually (45 degrees) and is cervical to the distal marginal ridge?

Answer 66

Mandibular 1st premolar

Question 67

Which tooth has a small lingual cusp that is non-functional and almost cingulum-like?

Answer 67

Mandibular 1st premolar

Question 68

Which tooth presents with 2-cusp ("U or "H") and 3-cusp ("Y"-more common) varieties?

Answer 68

Mandibular 2nd premolar

Question 69

Which premolar is the only one with multiple lingual cusps and develops from five developmental lobes?

Answer 69

3-cusp variety mandibular 2nd premolar

Question 70

What is the only premolar with a lingual groove?

Answer 70

3-cusp variety mandibular 2nd premolar

Question 71

What is the only premolar with a central fossa?

Answer 71

3-cusp variety mandibular 2nd premolar

Question 72

What is the most likely premolar to be congenitally missing?

Answer 72

3-cusp variety mandibular 2nd premolar

Question 73

What are the only teeth to have a mesiolingual lingual calibration that is greater than on the facial?

Answer 73

Maxillary 1st molar, 3-cusp variety mandibular premolar

Question 74

The 5th cusp (Carabelli) augments the lingual surface of which cusp on maxillary first molars?

Answer 74

ML cusp

Question 75

Which anatomical features combine to create the oblique ridge of all maxillary molars?

Answer 75

Distal cusp ridge of the ML cusp and the triangular ridge of the DF cusp

Question 76

What cusps form the primary cusp triangel of all maxillary molars?

Answer 76

MF, ML and DF cusps

Question 77

Which maxillary tooth has the shortest roots?

Answer 77

Maxillary 3rd molar

Question 78

Which tooth has the largest M-D crown dimensions of any tooth?

Answer 78

Mandibular 1st molar

Question 79

What is the only tooth to have two facial developmental grooves?

Answer 79

Mandibular 1st molar

Question 80

What is the widest tooth mesiodistally?

Answer 80

Mandibular 1st molar

Question 81

What is the widest primary tooth mesiodistally?

Answer 81

Mandibular 2nd molar

Question 82

What is the widest anterior tooth mesiodistally?

Answer 82

Maxillary central incisor

Question 83

What is the widest tooth faciolingually?

Answer 83

Maxillary 1st molar

Question 84

What is the widest primary tooth faciolingually?

Answer 84

Maxillary 2nd molar

Question 85

What is the widest anterior tooth faciolingually?

Answer 85

Maxillary canine

Question 86

What is the only tooth with a pulp chamber wider mesiodistally than faciolingually?

Answer 86

Maxillary central incisor

Question 87

What are the only three teeth to measure wider lingually than facially?

Answer 87

(1) primary maxillary 2nd molar, (2) permanent maxillary 1st molar and (3) 3-cusp variety mandibular 2nd premolar

Question 88

Which tooth has the longest root (CEJ to apex)?

Answer 88

Maxillary canine 17.0 mm

Question 89

What are the three tallest crowns incisogingivally?

Answer 89

Mandibular canine (11.0 mm) > Maxillary central incisor (10.5 mm) > maxillary canine (10.0 mm)

Question 90

What is the most common incident of a supernumerary tooth?

Answer 90

Mesiodens between maxillary central incisors

Question 91

What tooth has the smallest anatomical crown?

Answer 91

Mandibular central incisor

Question 92

What anterior tooth has the most symmetrical anatomical crown?

Answer 92

Mandibular central incisor

Question 93

What posterior tooth has the most symmetrical anatomical crown?

Answer 93

Maxillary 2nd premolar

Question 94

Which tooth has the narrowest M-D measurement?

Answer 94

Mandibular central incisor

Question 95

Which tooth has the best developed lingual anatomy?

Answer 95

Maxillary lateral incisor

Question 96

What is the only tooth with a linguogingival groove?

Answer 96

Maxillary lateral incisor

Question 97

What is the only tooth with a mesiolingual groove?

Answer 97

Mandibular 1st premolar

Question 98

What is the only tooth with a mesial marginal developmental groove?

Answer 98

Maxillary 1st premolar (maxillary molars may have supplemental marginal grooves)

Question 99

Where is the smallest facial embrasure in the mouth or the smallest lingual embrasure?

Answer 99

Between the two mandibular central incisors (they are essentially the same size)

Question 100

What is concrescence and where is it usually found?

Answer 100

Where the cementum of two proximal teeth is fused together; associated with 2nd and 3rd molars as well as anterior teeth

Question 101

What are the top three locations for impacted teeth?

Answer 101

(1) 3rd molars, (2) maxillary canines and (3) mandibular 2nd premolars