Dental Anomalies Lecture

Question 1

congenitally missing all teeth, usually with associated with broader defects, skin/hair/nails/sweat glands/salivary glands can also be impacted

Answer 1

anodontia

Question 2

state with permanent teeth were present at one time but are not there anymore

Answer 2

edentulous

Question 3

true or false, babies have anodontia

Answer 3

false

Question 4

missing tooth/teeth

Answer 4

partial anodontia

Question 5

true or false, partial anodontia can be unilateral or bilateral (as opposed to bilateral always)

Answer 5

true

Question 6

missing more than 6 teeth

Answer 6

oligodontia

Question 7

which arch is most likely to have missing teeth?

Answer 7

Mx

Question 8

other commonly missing teeth (1-2%)

Answer 8

Mx lateral incisors, Mn 2nd PM, Mx 2nd PM

Question 9

tooth least likely to be missing

Answer 9

canine

Question 10

additional teeth to dental formula, most common in maxilla, more common in male vs. female, typically downsized

Answer 10

supernumerary teeth

Question 11

supernumerary third molar names

Answer 11

distomolars, paramolars, 4th molars

Question 12

small supernumerary tooth at Mx midline, what percentage of people?

Answer 12

mesiodens, up to 2%

Question 13

morphological characteristic teeth most common

Answer 13

Mx 3rd molar, Mx lateral incisors

Question 14

a tooth splits during formation resulting in crown that is doubled in width and oftentimes notched in the middle

Answer 14

gemination (twinning)

Question 15

root is ____, ___ pulp canal in gemination

Answer 15

singular, one

Question 16

union of two adjacent teeth, separate but fused roots

Answer 16

fusion

Question 17

does fusion occur more in the Mx or Mn arch?

Answer 17

Mn

Question 18

wide cervix and narrow incisally, notched incisor, from congenital syphillis

Answer 18

hutchinson’s incisor

Question 19

congential syphillis, molar variation

Answer 19

mulberry molar

Question 20

enamel pearls, problematic when found on root

Answer 20

occlusal tubercles

Question 21

dramatic turn of the root

Answer 21

dilaceration

Question 22

fusion of cementum of two teeth

Answer 22

concresence

Question 23

condition where teeth are switched/flipped in position

Answer 23

transposition

Question 24

condition in which a tooth maintains a position below the occlusal plane

Answer 24

ankylosis

Question 25

rough, brown or pitter enamel, lack of enamel

Answer 25

amelogenesis imperfecta

Question 26

white spots, brown discoloration of teeth

Answer 26

fluorosis

Question 27

hereditary disorder in which teeth are opalescent, light grey/blue to yellow color

Answer 27

dentinogenesis imperfecta

Question 28

conditions in which dentin is not forming correctly

Answer 28

dentin dysplasia

Question 29

examples of dentin dysplasia

Answer 29

dentinogenesis imperfecta, tetracycline stain

Question 30

banding of grey/brown to yellow teeth, a dentin dysplasia anomaly, d/t exposure to tetracycline

Answer 30

tetracycline stain

Question 31

injury after tooth eruption (4)

Answer 31

attrition, abrasion, erosion, abfraction

Question 32

cervical, wedged lesion, lever forces, occlusal/parafunction habits, grinding, clenching can cause this

Answer 32

abfraction