It's like I have ESPN or something..

Question 1

Absence of teeth..

Answer 1

Anodontia (total or partial)

Question 2

An arch that has had some or all of its teeth extracted..

Answer 2

Edentulous.

Question 3

Partial anodontia: most commonly missing adult teeth..

Answer 3

1) third molars (especially maxillary)
2) maxillary lateral incisors (1-2% of population)
3) mandibular second premolars (1%)

Question 4

Supernumerary Teeth..

A) most common dentition/arch
B) areas of arch

Answer 4

A) permanent dentition/ 90% maxillary arch
B) 1. Maxillary incisor area
2. Third molar area
3. Mandibular premolar area

Question 5

Supernumerary tooth present in midline between the two central incisors..

Answer 5

Mesiodens.

Question 6

Extramolar positions…

Answer 6

A) paramolar
B) distomolar
C) fourth molar

Question 7

Peg-shaped lateral incisors occur in..

Answer 7

1-2% of the population.

Note: peg-shaped central incisors are very rare.

Question 8

One crown double in width due to a germinal center that partially splits..

Answer 8

Germination.

Question 9

Germination (twinning) teeth:

A) characteristics
B) location

Answer 9

A) One root, one pulp chamber, one canal

B) primarily maxillary anteriors (Incisal area)

Question 10

Two adjacent crowns come together and appear double in width due to 2 germinal centers that fuse during development..

Answer 10

Fusion.

Note: a supernumerary mesiodens can fuse to an incisor; supernumerary paramolar can fuse to a permanent third molar.

Question 11

Fusion of teeth..

A) characteristics
B) location

Answer 11

A) two roots, two pulp chambers and canals

B) primary mandibular anteriors

Question 12

Congenital syphilis produces..

Answer 12

Hutchinson’s incisors (no separation on facial surface) and Mulberry Molars.

Question 13

Extra cusp (middle lingual) on mandibular molars..

Answer 13

Tuberculum Intermedium.

Question 14

Extra cusp on lingual surface of incisors..

Answer 14

Talon cusp.

Question 15

Talon cusp..

A) composition
B) characteristics

Answer 15

A) not made of enamel

B) has its own pulp horn

Question 16

Macrodontia affects..

Answer 16

Incisors and canines.

Generalized, pituitary giants

Question 17

Microdontia affects..

Answer 17

Maxillary lateral incisors and third molars.

Question 18

Shovel-shaped incisors are most common in these populations..

Answer 18

American Indians, Asians, Mongoloid, and Eskimos.

Question 19

Flexion..

Answer 19

Occurs at any level of the root.

Can be caused by trauma or lack of space.

Question 20

Delaceration..

Answer 20

Occurs at the level of the CEJ.

Can be caused by trauma or lack of space.

Question 21

Enamel pearls..

A) definition
B) location

Answer 21

A) Small pearls of enamel with dentin core inside (require no intervention if no periodontal problems)
B) areas of furcation

Question 22

Taurodontia..

A) characteristics
B) populations

Answer 22

A) big, wide root; no canal - just a big pulp chamber; no taper
B) Neanderthals, Native Americans, Eskimos

Note: more common in women

Question 23

Dens in dente..

A) embryology
B) consequences

Answer 23

A) invagination of enamel

B) teeth will have a deep lingual pit; must seal pit with composite

Question 24

Hypercementosis..

A) definition
B) etiology

Answer 24

“Webbed teeth”

A) thickening of cementum
B) trauma or metabolic dysfunction

Question 25

Concrescence of roots is the..

Answer 25

Joining of cementum of adjacent teeth after eruption.

Question 26

Dwarfed roots..

A) generalized
B) localized

Answer 26

A) hereditary

B) orthodontics: moves teeth too fast

Question 27

Accessory roots most common in..

Answer 27

Third molars, mandibular first and second premolars, mandibular canines

Note: most commonly facial and ligule roots; mesial/distal is rare

Question 28

Impacted teeth fail to erupt..

Answer 28

Due to being physically and mechanically blocked.

Question 29

Unerupted teeth fail to erupt..

Answer 29

Due to lack of eruption forces.

Question 30

Transposition..

Answer 30

Teeth switch places (e.g., lateral incisors and canines)

Question 31

Transmigration..

Answer 31

A tooth that erupts somewhere other than its normal eruption site without switching places with another tooth.

Question 32

Torsiversion..

Answer 32

Rotation of a tooth on its long axis out of normal position.

Question 33

Ankylosis..

Answer 33

Loss of periodontal ligament, as root fuses to bone

Note: failure to complete eruption due to trauma or infection; common in primary teeth with no permanent teeth to replace.

Question 34

Enamel Dysplasia..

Answer 34

Abnormal enamel formation

A) Amelogenesis Imperfecta
B) fluorosis
C) enamel damage from high fever
D) focal hyper maturation

Question 35

Dentin Dysplasia..

Answer 35

Abnormal dentin formation

A) Dentinogenesis Imperfecta
B) Tetracycline Stain

Question 36

Two tooth malformations that are hereditary and affect both dentitions..

Answer 36

A) Amelogenesis Imperfecta

B) Dentinogenesis Impefecta

Question 37

To be considered an anomaly..

Answer 37

It must occur during embryonic development.

Question 38

Mild fluorosis is expressed as..

Answer 38

Mottled enamel.

Question 39

Severe fluorosis is expressed as..

Answer 39

Pitted enamel.

Question 40

Turner’s tooth (focal enamel hypoplasia) results from..

Answer 40

Abcess or trauma.

Question 41

Dentinogenesis Imperfecta is characterized by..

Answer 41

No dentin or pulp chambers, grayish-blue in color, prone to fractures, and the present enamel is brittle.

Note: must crown.

Question 42

Biliary artisia is caused by..

Answer 42

Obstruction of the common hepatic duct.

Question 43

Tetracycline stains the dentition, because it can..

Answer 43

Cross the placental barrier.

Question 44

Attrition..

Answer 44

Wear of enamel and dentin due to opposing tooth contact. (Bruxism)

Question 45

Abrasion..

Answer 45

Wear of tooth structure by mechanical means, e.g., tooth brush, tooth pick, chewing tobacco.

Question 46

Abfraction..

Answer 46

Bringing of tooth structure due to heavy occlusion with enamel chipping at cervical.

Question 47

Erosion..

Answer 47

Wear of tooth structure due to chemical agents, e.g., carbonated beverages, bulimic patients.