Permanent Anterior Teeth

Question 1

General characteristics of the maxillary incisors

Answer 1

Arch is stationary
Function in mastication is to cut, sheer, punch and bite
Aesthetic value

Question 2

What is the difference between the lateral and central maxillary incisors in terms of size

Answer 2

Crown on the central incisors are larger but the roots are the same length

Question 3

Why don’t we usually see Mamelon on the teeth

Answer 3

We see them during the developmental stage but they usually wear away from functional occlusion

Question 4

What are perikmata

Answer 4

Slight grooves that run mesial to distal on the maxillary central incisors and usually wear after irruption

Question 5

What is the labioincisal edge

Answer 5

Junction of the labial surface and incisal edge

Question 6

What is the linguoincisal edge

Answer 6

Junction of the lingual aspect and incisal edge

Question 7

What is the height of contour on the mesial surface of a central incisor? Describe the mesial line and incisal angles

Answer 7

Contact area between adjacent teeth. Just apical to the incisal ridge

Line angle is straight and incisal angle is sharp

Question 8

 what is the height of contour on a maxillary central incisor? Describe the distal line and incisal angles

Answer 8

Contact area apical to the junction of the incisal and middle thirds of adjacent teeth

Line angle is curved, incisal angle is more rounded

Question 9

Describe the CEJ of a maxillary central incisor

Answer 9

Curves apically, centered over middle third of root

Question 10

What is the cingulum and where is it located?

Answer 10

Fourth developmental lobe. Located in cervical third, slightly distal to the midline

Question 11

What are marginal ridges?

Answer 11

Elevations on the mesial and distal surfaces of the labial aspect of the central incisors

Mesial is straighter and longer
Distal is curved and shorter

Question 12

What is the lingual fossa

Answer 12

Concavity in the middle and incisal 1/3’s

Bordered by the mesial marginal ridge, the distal marginal ridge, cingulum and incisal ridge

Question 13

What does the labiolingual midline do?

Answer 13

Divides the label and lingual halves

Question 14

What is the lingual height of contour on a maxillary central incisor?

Answer 14

Middle of the cingulum

Question 15

What is the labial height of contour on a maxillary central incisor

Answer 15

Middle third

Question 16

What is the mesial height of contour on a maxillary central incisor

Answer 16

Broad in middle third

Question 17

What is the distal height of contour on the maxillary central incisor

Answer 17

Narrow in the middle third

Question 18

Which marginal Ridge on the maxillary central incisors is longer?

Answer 18

The mesial marginal ridge is slightly longer than the distal marginal ridge

Question 19

What is the shape of the root of a maxillary central incisor?

Answer 19

Triangular cone with a blunt Apex, overall straight but tilts slightly to the distal

Question 20

Location and number of pulp horns of a maxillary central incisor

Answer 20

 in the crown with 2 to 3 pulp horns

Question 21

What is a Talon cusp?

Answer 21

Sharp, small extra cusp forms from the cingulum

Question 22

What are mesiodens

Answer 22

Supernumerary Tooth, forms between maxillary central incisors in midline

Question 23

What does Hawk billed mean

Answer 23

Incisal ridge centered over the lingual third

Normal specimen would have the incisal ridge centered in line with the root

Question 24

What is an avulsion

Answer 24

Complete displacement of the tooth due to blunt trauma

Question 25

What are Hutchinson incisors

Answer 25

Screwdriver shaped, notched incisal ridge, caused by congenital syphilis

Question 26

What is the distal height of contour on the maxillary central incisor? Describe the distal line and incisal angles

Answer 26

Contact area just apical to the junction of the incisal and middle 1/3’s Line angle is more curved, incisal angle is more rounded

Question 27

what is the height of contour on the mesial surface of the maxillary lateral incisors? Describe the mesial Line and incisal angles

Answer 27

Contact area just incisal to the junction of the incisal and middle 1/3’s Line angle is slightly more curved, incisal angle is not as sharp

Question 28

Where is the lingual pit? What risk is associated with it?

Answer 28

May form at the base of the lingual fossa. Associated with risk of dental caries

Question 29

Which marginal ridge is longer on the maxillary lateral incisors?

Answer 29

Mesial marginal ridge is longer and straighter while the distal marginal ridge is shorter and curved

Question 30

Describe the incisal ridge in the incisal view of the maxillary lateral incisors

Answer 30

More curved, just labial to the labial lingual midline

Question 31

What is the shape of the root in a maxillary lateral incisor

Answer 31

Oval and tapers. Apical third usually curves to the distal

Question 32

Where do we see the root depression on a maxillary lateral incisor

Answer 32

Prominent on the distal

Question 33

Which direction does the CEJ curve on the mesial view of the maxillary lateral incisors

Answer 33

Curves incisally

Question 34

How does the CEJ curve on the distal view of the maxillary lateral incisor

Answer 34

Curves less incisally

Question 35

Describe the incisal Ridge on the label view of the maxillary lateral incisors

Answer 35

More curved

Question 36

Where is the CEJ on the labial view of the maxillary lateral incisors

Answer 36

Centered just distal to the midline

Question 37

Describe the developmental groove on the lingual view of the maxillary lateral incisors

Answer 37

If present it is often very deep and may extend onto the root. Has periodontal and caries risk

Question 38

Which tooth varies inform more than any other tooth except for the third molar

Answer 38

Maxillary lateral incisors

Question 39

What are peg lateral teeth

Answer 39

Condition where the maxillary lateral incisors are underdeveloped and small Likely a congenital defect caused by congenital syphilis

Question 40

What does dens in Dente mean?

Answer 40

Occurs when the tooth’s enamel folds into the Dentin during development May leave a deep lingual pit

Question 41

What is the function of mandibular incisors?

Answer 41

Mastication- movable cutting bar | Incise, punch and cut

Question 42

Mandibular incisors are the smallest Teeth in mesial to distal, but wider label to lingual. Why is this?

Answer 42

Because the masticatory force is greatest in the labial lingual direction

Question 43

Which of the mandibular central incisors are the smallest?

Answer 43

Central incisors are slightly smaller than laterals

Question 44

Which are the first succedaneous/permanent teeth to erupt?

Answer 44

Mandibular central incisors

Question 45

What occurs from incisal wear on the mandibular central/lateral incisors

Answer 45

excessive attrition and dentin exposure

Question 46

Which anterior teeth are a high incidence area for bio film and calculus?

Answer 46

Mandibular central and lateral incisors

Question 47

Describe the incisal Ridge of the mandibular central incisors

Answer 47

Fan shaped, centered over the route and bilaterally symmetrical to the long axis

Question 48

Location of the CEJ on the labial | View the mandibular central incisors

Answer 48

Centered over the midline

Question 49

Describe the line angles of the mandibular central incisors

Answer 49

The mesial and distal line angles are relatively straight

Question 50

Describe the incisal angles of the mandibular central incisors

Answer 50

Both mesial and distal are close to 90° angles

Question 51

Describe the cingulum, lingual Fossa and marginal ridges of them mandibular central incisors

Answer 51

Cingulum is centered over the root and not prominent Lingual fossa is very shallow and almost flat Marginal ridges are not prominent

Question 52

Describe the CEJ on the Mesial view of the mandibular central incisors?

Answer 52

Curves incisally about 3 mm

Question 53

Describe the CEJ on the distal view of the mandibular central incisors

Answer 53

Curves less incisally by 2 mm

Question 54

Where are the proximal route depressions on the mandibular central incisors and what do they look like?

Answer 54

Found on both the mesial and distal surfaces, gives The root a ribbon/bow shape

Question 55

What is a variation that may occur in the root of the mandibular central and lateral incisors

Answer 55

May bifurcate

Question 56

Describe the cingulum on the lingual surface of the mandibular lateral incisor 

Answer 56

Slightly tilted to the distal

Question 57

Describe the CEJ on the mesial and distal surfaces of the mandibular lateral incisors

Answer 57

Mesial curves incisally about 3 mm Distal curves incisally only 2 mm

Question 58

Describe the incisal ridge on the distal aspect of the incisal view Of the mandibular lateral incisor

Answer 58

Curves lingually, appears twisted on it’s a long axis

Question 59

Describe the route depression on the distal aspect of the root of the mandibular lateral incisor

Answer 59

Very deep root depression

Question 60

What is the function of the canines

Answer 60

To pierce and tear, supports incisors and pre-molars

Question 61

What makes the canines the most stable Tooth in Dentition

Answer 61

The labial/lingual width of the crown and root

Question 62

What gives the canines the greatest Anchorage

Answer 62

Longest routes in Dentition

Question 63

Which tooth has the greatest longevity of any tooth in the Dentition

Answer 63

Canines

Question 64

What can cause canines to become impacted?

Answer 64

Anterior crowding and may develop cysts (developmental/dentigerous cysts)

Question 65

Describe the CEJ on the label view of the maxillary canines

Answer 65

Curves apically, often has an elevated, rolled enamel border

Question 66

Describe the medial aspect of the maxillary canine on the labial view

Answer 66

Is convex and may have a slight concavity above the contact

Question 67

Describe the distal aspect of the maxillary canine from the labial view

Answer 67

Concave from CEJ to contact then convex

Question 68

Which cusp slope is shorter on the maxillary canines

Answer 68

Mesial‘s cusp slope is shorter, distal cusp slope is longer

Question 69

What occurs from maxillary canine incisal wear

Answer 69

Cusp tip moves distally and mesial cusp slope lengthens Lingual cusp surface shows wear due to occlusion

Question 70

Describe the width of the maxillary canines from the lingual view

Answer 70

Crown and root are narrow on the lingual aspect

Question 71

Does the CEJ curve more incisally on the mesial or distal view of anterior teeth?

Answer 71

More on the mesial view

Question 72

Why is the lingual aspect of the root of the maxillary canine narrow?

Answer 72

To accommodate the curve of the arch

Question 73

Describe the apical third of the root of the maxillary canine

Answer 73

May curve sharply mesially or distally but distal is most common

Question 74

What is the function of route depressions in the maxillary canines? On which surface is it most pronounced?

Answer 74

Aid in anchoring the route and preventing tooth rotation More pronounced on the distal surface

Question 75

Describe the pump chamber and pop canal in the root of the maxillary canine

Answer 75

Pulp chamber is in the crown with one rounded or two pulp horns One pulp canal with an oval shape

Question 76

Are the mandibular canine crowns wider or narrower mesial to distal on the labial view?

Answer 76

Crown is narrower mesial to distal

Question 77

Are the mandibular or maxillary canines longer from cusp tip to CEJ?

Answer 77

Mandibular crowns are longer

Question 78

Describe the lingual view of the mandibular canines

Answer 78

Flatter, resemble the mandibular lateral incisors, languages are not prominent

Question 79

What occurs from mandibular incisal where of the canines

Answer 79

Cusp tip moves immediately and distal cusp slope lengthens Mandibular King aspec Prussia Ohhhh is where on the labial surface, maxillary cusp wears more lingually

Question 80

Possible variation of the mandibular canines

Answer 80

Made bifurcate on the apical third