dental anomalies

Question 1

most common missing adult teeth

Answer 1

1. max 3rd molars
2. max lateral incisors
3. mandibular 2nd premolar

Question 2

other less common missing

Answer 2

1. primary mandibular central incisor

2. permanent mandibular central incisor

Question 3

supernumarary teeth most common

Answer 3

1. max incisor area
2. thrid molar area
3. mandibular premolar area

Question 4

mesiodens

Answer 4

extra maxillary incisor. can erupt or not erupt. cone shape. right in between centrals

Question 5

extra molar

Answer 5

paramolar, distomolar, fourth molar, maxillary, could be more than one

Question 6

top 5 abnormal crown morphology

Answer 6

1. third molars
2. peg shaped maxillary laterals
3. germination
4. fusion
5. hutchinson’s (syphilis)

Question 7

Germination

Answer 7

primary anterior teeth. 5 incisors instead of 4

2 crowns fused but one root, one pulp chamber, and one canal

Question 8

fusion

Answer 8

primary anterior teeth, count only 3 distinct crowns total instead of 4. has two of everything, just fused

Question 9

hutchinson’s

Answer 9

incisors have “V” shape, not fusion!

mulberry molars

Question 10

talon cusp

Answer 10

incisor has huge cusp on back, has own pulp horn

Question 11

macrodontia

Answer 11

affects incisors and canines

Question 12

microdontia

Answer 12

affects maxillary lateral incisors and third molars

Question 13

shovel shaped maxillary incisors

Answer 13

more common in american indians, asian, mongoloid and eskimos

Question 14

top 5 root abnormalities

Answer 14

1. dilaceration and flexion
2. enamel pearls
3. taurodontia
4. dens in dente
5. hypercementosis
6. concrescence
7. dwarfed roots
8. accessory roots

Question 15

dilaceratoin

Answer 15

severe bending of root at CEJ

Question 16

flexion

Answer 16

severe bending of root at other parts besides CEJ

Question 17

Taurodontia

Answer 17

Bull tooth, no CEJ constriction. molars usually, usually large pulp cavities

Question 18

dens in dente

Answer 18

tooth inside tooth

Question 19

kypercementosis

Answer 19

lots of cementum

Question 20

concrescence

Answer 20

joining of cementum of adjacent teeth AFTER ERUPTION

Question 21

dwarfed roots

Answer 21

incisors

Question 22

accessory roots

Answer 22

third molars and mandibular first and second molar
most common for mandibular canine and premolar (facial lingual root not MD)- could have 2
also on max first molars- could have 3

Question 23

transposition

Answer 23

teeth switch position in arch

Question 24

ectopic

Answer 24

tooth erupts somewhere other than mouth

Question 25

ankylosis

Answer 25

failure to complete eruption due to infection or trauma or don't have permanent tooth.

Question 26

amelogenesis imperfecta

Answer 26

faulty enamel formation- hereditary total or partial lack of enamel. both dentitions

Question 27

fluorosis

Answer 27

enamel, from too much fluoride during tooth formation, mild=mottled enamel, severe= pitted enamel

Question 28

focal enamel hypoplasia

Answer 28

turners tooth, from local trauma or infection like an abscess on primary tooth.

Question 29

dentinogenesis imperfecta

Answer 29

faulty dentin formation, hereditary, both dentitions

Question 30

tetracycline stain

Answer 30

drug taken while tooth forming

Question 31

bruxism

Answer 31

heavy weight load, stress on teeth during night

Question 32

attrition

Answer 32

tooth wear from tooth-to-tooth grinding or bruxing

Question 33

abrasion

Answer 33

tooth wear from abrasive products, brushing tooth, tobacco chewing.

Question 34

erosion

Answer 34

tooth destruction from acids,

Question 35

most unusual dentition

Answer 35

mandibular molars have maxillary molar anatomy