Dental Anomalies

Question 1

Anomalies are more common in:
Maxillary or Mandibular?
Permanent or Primary?

Answer 1

Maxillary

Permanent

Question 2

Condition where person has no eyebrows, eyelashes, nails, teeth (total anodontia), and less hair

Answer 2

Ectodermal Dysplasia

Question 3

Partial Anodontia: Most commonly missing adult teeth (in order):

Answer 3

1. Third molars (especially maxillary)
2. Maxillary lateral incisors (1-2% of population)
3. Mandibular second premolars (1%)

Question 4

What primary teeth are most commonly missing?

Answer 4

Primary mandibular central incisors

Question 5

Most common Extra/Supernumerary Teeth (in order):

Answer 5

(Mainly Permanent dentitions, 90% maxillary arch)

1. Maxillary Incisor Area (Mesiodens between max centrals)
2. Third Molar Area (Paramolar, Distomolar, Fourth Molar)
3. Mandibular Premolar Area

Question 6

Peg-shaped crown anomalies happen usually to _____ and rarely to _____ and they form from ____ lobe(s)

Answer 6

Maxillary lateral incisors

Maxillary central incisors

1

Question 7

The most variable crown morphology happens with _____

Answer 7

Malformed Third Molars

Question 8

One crown double in width; one root, one pulp chamber and canal

Answer 8

Gemination (Twinning)

Question 9

Two adjacent crowns join together and appear double in width (two roots, two pulp chambers and canals)

Answer 9

Fusion

Question 10

Congenital Syphilis causes ______ (wide incisors with an incisal notch) and _____ (extra tubercles on first molars)

Answer 10

Hutchinson’s Incisors

Mulberry Molars

Question 11

Extra cusps between cusps

Answer 11

Tuberculum Intermedium

Question 12

Extra cusps on distal marginal ridge

Answer 12

Tuberculum Sextum

Question 13

Extra lingual cusp

Answer 13

Talon Cusp

Question 14

Teeth that are extra big.

Most common teeth affected?

Answer 14

Macrodontia

Incisors and canines

Question 15

Teeth that are extra small.

Most common teeth affected?

Answer 15

Microdontia

Max lateral incisors and 3rd molars

Question 16

Anomaly more common in American Indians, Asians, Mongolians, and Eskimos

Answer 16

Shovel-shaped Maxillary Incisors

Question 17

Flexion at CEJ

Answer 17

Dilaceration

Question 18

Severe bending of root

Answer 18

Flexion

Question 19

Little spheres of enamel with core of dentin (often near root furcation)

Answer 19

Enamel Pearls

Question 20

Root doesn’t taper to apex but widens out instead (Bull tooth)

Answer 20

Taurodontia

Question 21

Tooth within a tooth, seal entrance to prevent decay (5% of population)

Answer 21

Dens in Dente

Question 22

Thickening of cementum (and webbed roots) due to trauma/infection

Answer 22

Hypercementosis

Question 23

Joining of cementum of adjacent teeth after eruption (different from fusion which is before eruption)

Answer 23

Concrescence of Roots

Question 24

Shortened roots from hereditary or orthodontic movements

Answer 24

Dwarfed Roots

Question 25

Extra roots? Most common teeth?

Answer 25

Accessory Roots Mandibular Canine and Premolar (facial and lingual root); Maxillary First premolar

Question 26

Tooth cannot erupt because of position

Answer 26

Impacted tooth

Question 27

Teeth switch places

Answer 27

Transposition

Question 28

Failure to complete eruption due to trauma/infection; loss of periodontal ligament, root fused to bone

Answer 28

Ankylosis

Question 29

Tooth erupts in weird spot (for example nose)

Answer 29

Ectopic Eruption

Question 30

Tooth eruption doesn't reach occlusal plane? Beyond occlusal plane? Lingual to occlusal plane?

Answer 30

Infraversion Supraversion Linguaversion

Question 31

Too much fluoride -> mottled/pitted enamel

Answer 31

Flourosis

Question 32

Hereditary total or partial lack of enamel (primary/permanent)

Answer 32

Amelogenesis Imperfecta

Question 33

Pitted enamel (damage) can be caused by this illness

Answer 33

High Fever

Question 34

Cavitation or white spot from local trauma or infection like an abscess on primary tooth

Answer 34

Focal Hypoplasia (Turner's Tooth)

Question 35

Faulty development of dentin (hereditary) (no dentin, no pulp chamber)

Answer 35

Dentinogenesis Imperfecta

Question 36

Drug is taken while tooth is forming to cause this stain

Answer 36

Tetracycline Stain

Question 37

Strips of green on teeth from bile duct blockage

Answer 37

Biliary Atrisia

Question 38

Tooth wear from tooth-to-tooth grinding (Bruxism)

Answer 38

Attrition

Question 39

Bending of tooth due to heavy occlusion with enamel chipping off at cervical

Answer 39

Abfraction

Question 40

Tooth wear by mechanical means (brushing, toothpaste, tobacco chewing)

Answer 40

Abrasion

Question 41

Tooth destruction from acids

Answer 41

Erosion