632-641

Question 1

Homodont dentition:

Answer 1

All teeth have the same morphology

Question 2

Heterodont dentition:

Answer 2

Teeth have different morphology (eg, humans).

Question 3

Monophyodont dentition:

■

Answer 3

One set of teeth.

Question 4

Diphyodont dentition:

Answer 4

Two sets of teeth (eg, humans).

Question 5

Polyphyodont dentition:

Answer 5

Multiple sets of teeth.

Question 6

Anterior teeth: Incisors and canines.

■ Posterior teeth: Premolars and molars.

Answer 6

12 total (6 per arch).

20 total (10 per arch).

Question 7

Anatomic crown:

Answer 7

The portion of the tooth that extends from the cementoenamel

junction (CEJ) to the incisal edge or occlusal surface (enamelcovered

portion of the tooth).

Question 8

Clinical crown:

Answer 8

The portion of the tooth that extends incisally or occlusally

from the gingival margin (clinically visible portion of the tooth).

Question 9

Occlusal table:

Answer 9

The occlusal surface within the cusp and marginal ridges

Question 10

The primary center of enamel formation in a tooth.

Answer 10

Lobe:

Question 11

In fully formedteeth, lobes are represented by

Answer 11

cusps, mamelons, and cingula, and are separated

by developmental depressions (anterior teeth) or developmental

grooves (posterior teeth).

Question 12

Mamelon:

Answer 12

A round extension of enamel on the incisal edge of all incisors.

Question 13

(See Figure 24–1.) There are usually three mamelons per .

Answer 13

incisor (one for

each facial lobe). They are often translucent because of a lack of underlying

dentin.

Question 14

Mamelons are typically worn down by

Answer 14

attrition and mastication;

thus, their presence in adults is an indication of malocclusion

Question 15

Cingulum:

Answer 15

A bulbous convexity of enamel located on the cervical third of

the lingual surface of all anterior teeth.

Question 16

Cusp:

Answer 16

A large elevation of enamel located on the occlusal surface of all

posterior teeth and the incisal edge of canines.

Question 17

Tubercle:

Answer 17

An extra formation of enamel on the crown of a tooth. Often

manifests as a supernumerary cusp, such as the cusp of Carabelli.

Question 18

https://drive.google.com/open?id=0B8uJUY-tie8GelVKcVI0TE1LLVU

Answer 18

https://drive.google.com/open?id=0B8uJUY-tie8GYTdLLUdGNlJ3dWc

Question 19

Ridge: ■

Answer 19

A linear elevation on the enamel surface.

Question 20

Marginal ridge:

Answer 20

A ridge on all teeth that forms the mesial and distal margins

of posterior occlusal surfaces and anterior lingual surfaces

Question 21

https://drive.google.com/open?id=0B8uJUY-tie8GaE9idGphMXl6c3c

Answer 21

https://drive.google.com/open?id=0B8uJUY-tie8GVWx1M0lBcmhVMGc

Question 22

a ridge only on canines that runs incisocervically in the center

of the facial crown surface. More prominent in maxillary canines.

Answer 22

labial ridge

Question 23

A ridge only on premolars that runs occlusocervically

in the center of the buccal crown surface. More prominent in first

premolars.

Answer 23

Buccal (cusp) ridge:

Question 24

A ridge on all primary teeth and permanent molars that

runs mesiodistally in the cervical third of the buccal surface of the crown.

Answer 24

Cervical ridge:

Question 25

ridge on all maxillary molars that extends from the ML to DB cusps (it separates the MB and DL cusps).

Answer 25

Oblique ridge:

Question 26

A ridge on all posterior teeth that extends from the cusp tip to the central groove. The ML cusp of all maxillary molars has two triangular ridges.

Answer 26

Triangular ridge:

Question 27

A ridge on most posterior teeth that runs buccolingually and connects opposing buccal and lingual triangular ridges. Most common on maxillary premolars and mandibular molars.

Answer 27

Transverse ridge:

Question 28

V-shaped depression on the occlusal surface of posterior teeth between ridges and cusps.

Answer 28

Sulcus:

Question 29

irregularly shaped depression in the enamel surface.

Answer 29

Fossa:

Question 30

: A well-defined, shallow, linear depression in enamel that separates the cusps, lobes, and marginal ridges of a tooth.

Answer 30

Developmental groove

Question 31

A narrow crevice at the deepest portion of the developmental groove in enamel.

Answer 31

Fissure:

Question 32

: A small pinpoint concavity at the termination or junction of developmental grooves

Answer 32

Pit

Question 33

: An irregularly defined, short groove auxiliary to a developmental groove that does not separate major tooth parts.

Answer 33

Supplemental groove

Question 34

Line angle:■

Answer 34

An angle formed by the junction of two surfaces.

Question 35

Point angle:

Answer 35

An angle formed by the junction of three surfaces.

Question 36

Contact area:

Answer 36

he location at which the proximal surfaces of two adjacent teeth make contact.

Question 37

Embrasure:

Answer 37

A triangular-shaped space between the proximal surfaces of adjacent teeth which diverges in four directions from the contact area.

Question 38

Buccal ■ Lingual ■ Occlusal/incisal ■ Cervical/gingival (interproximal space): In health, this space is completely filled with the gingival papilla.

Answer 38

embrasures

Question 39

Largest occlusal embrasure:

Answer 39

between max canine and PM1

Question 40

Largest incisal embrasure:

Answer 40

between max lateral and canin

Question 41

Smallest incisal embrasure: ■

Answer 41

between mand centrals.

Question 42

In general, lingual embrasures \> buccal embrasures,

Answer 42

except Max M1 (buccal embrasures \> lingual)

Question 43

Furcation:

Answer 43

The area of a multirooted tooth where the roots diverge

Question 44

All dental and periodontal innervation arises from the

Answer 44

trigeminal nerve (CN V)

Question 45

The maxillary nerve (V-2) supplies the ■

Answer 45

maxillary teeth.

Question 46

The mandibular nerve (V-3) supplies the

Answer 46

mandibular teeth.

Question 47

All dental and periodontal arterial supply arises from the

Answer 47

maxillary artery

Question 48

The arterial supply of dental and periodontium generally parallels the

Answer 48

corresponding nerves.

Question 49

All dental and periodontal venous return drains to the

Answer 49

pterygoid plexus of veins, which eventually forms as the maxillary vein.

Question 50

https://drive.google.com/open?id=0B8uJUY-tie8GZGE0Q2VlZzZyVDg

Answer 50

https://drive.google.com/open?id=0B8uJUY-tie8GOUdCeGF0TmY0emM

Question 51

https://drive.google.com/open?id=0B8uJUY-tie8GaXpYV1RITVBBdG8

Answer 51

https://drive.google.com/open?id=0B8uJUY-tie8GWTV0WVNXZFlPN0k

Question 52

Federation Dentaire Internationale (FDI) System:

Answer 52

Federation Dentaire Internationale (FDI) System: Each tooth is given a two-digit number. The first digit represents the quadrant in which the tooth is located (1, 2, 3, or 4). The second digit indicates the tooth position relative to the midline, from closest to farthest away (1 to 8) (Figure 24–7B).

Question 53

prox contacts

Answer 53

Generally located increasingly more incisally (occlusally) from the posterior to the anterior.

Question 54

The mesial contact is always located more incisally than the distal.

Answer 54

prox contact

Question 55

Proximal contacts prevent

Answer 55

rotation, mesial drift, and food impaction.

Question 56

All are located in the---- of the crown. ■ Posterior contacts are positioned slightly -----

Answer 56

All are located in the middle 1/3 of the crown. ■ Posterior contacts are positioned slightly buccal.

Question 57

All anterior teeth.

Answer 57

Triangular:

Question 58

Trapezoidal: ■

Answer 58

All maxillary posterior teeth.

Question 59

Rhomboidal:

Answer 59

All mandibular posterior teeth.

Question 60

Facial HOC’s:■ ■

Answer 60

Located in the cervical third, except mandibular molars (junction of cervical and middle thirds).

Question 61

Facial HOC Most prominent on---- ------ teeth. ■ Least prominent on------ ------teeth.

Answer 61

Facial HOC Most prominent on mandibular posterior teeth. ■ Least prominent on mandibular anterior teeth.

Question 62

Lingual HOC’s: ■ Anterior teeth:

Answer 62

Located in the cervical third (cingulum).

Question 63

ling. HOC Posterior teeth:

Answer 63

Located in middle third, except mandibular PM2 (occlusal third).

Question 64

Help form the mesial and distal contact areas. ■ Allow for adequate gingival health.

Answer 64

HOC

Question 65

The maximum height of the proximal CEJ contour increases

Answer 65

ant

Question 66

The mesial CEJ contour is always ----- than the distal contour. ■ The greatest CEJ contour is on the maxillary ---- -----

Answer 66

The mesial CEJ contour is always greater than the distal contour. ■ The greatest CEJ contour is on the maxillary central incisor (mesial surface).

Question 67

Incisors and canines:

Answer 67

4 lobes (3 labial [mamelons], 1 lingual [cingulum]).

Question 68

Premolars:

Answer 68

4 lobes (3 buccal, 1 lingual) except mand PM2, which has 5 lobes (3 buccal, 2 lingual).

Question 69

5 lobes (one for each cusp). ■

Answer 69

First molars:

Question 70

Second molars: Third molars:

Answer 70

4 lobes (one for each cusp). 4 or 5 lobes (one for each cusp, depending on variation).

Question 71

Maxillary: ■

Answer 71

128 mm (slightly longer).

Question 72

Mandibular:

Answer 72

126 mm.

Question 73

Most prominent tooth.

Answer 73

max. CI

Question 74

Greatest mesial CEJ contour of all teeth. ■ Second longest crown (next to mandibular canine).

Answer 74

max. CI

Question 75

Widest (M-D) of all anterior teeth.

Answer 75

Max CI

Question 76

Occlusal shape is triangular; proximal shape is triangular. ■ Has three mamelons and four developmental grooves.

Answer 76

Central CI

Question 77

MMR \> DMR

Answer 77

max CI

Question 78

MI corner sharper than

Answer 78

DI in max CI

Question 79

Narrowest incisal embrasures of all maxillary teeth.

Answer 79

max CI

Question 80

oclusal of max CI

Answer 80

M-D dimension \> F-L (from occlusal).

Question 81

Cingulum: slightly distal.

Answer 81

max CI

Question 82

Least likely to have a divided root canal.

Answer 82

max CI

Question 83

Roundest root form; can be rotated during extraction. ■ Blunted apex.

Answer 83

Max CI

Question 84

Has greatest axial inclination toward the facial. ■ Sits almost vertically (M-D) in alveolar bone.

Answer 84

max CI

Question 85

Occludes with mandibular central and lateral incisors

Answer 85

max CI

Question 86

Third most common congenitally missing tooth (next to third molars).

Answer 86

max lat inc