variation lecture that i missed :(

Question 1

enamel hypoplasia

Answer 1

• dark pits, rows of defective enamel or malformed enamel

- occurs when ameloblasts are disturbed during development

Question 2

disturbing ameloblasts during development

Answer 2

trauma, infection, low calcium, neural disorder

Question 3

enamel hypocalcification

Answer 3

disturbance that affects the calcification of the tooth during development
-looks like a white spot

Question 4

fluorosis

Answer 4

excessive intake of fluoride during the formative period of the tooth

Question 5

amelogenesis imperfecta

Answer 5

enamel defects

• both deciduous and permanent affected
• thin enamel
• highly susceptible to decay

Question 6

dentinogenesis imperfecta

Answer 6

• hereditary
• light blue/grey
• dentin formation affected
• ABSENCE of pulp
• • teeth are very weak

Question 7

tetracycline stain

Answer 7

• if its taken while teeth are forming
• permanent grey stain
• severity dependent on dosage

Question 8

peg shaped lateral incisors

Answer 8

most common genetic anomaly

• 1-2%
• develop from ONE labial lobe

Question 9

misplaced teeth (transportation)

Answer 9

mainly in max and mand CANINES

Question 10

complete absence of teeth

Answer 10

anodontia

Question 11

teeth usually missing in hypodontia

Answer 11

• 3rd molars (usually max than mand)
• max lateral incisors
• mad 2nd premolars
• mand central incisors

Question 12

what % of the population have at least one 3rd molar missing

Answer 12

25 to 40%

Question 13

what % of the population is missing at least one max lateral incisor

Answer 13

1-2%

Question 14

oligodontia

Answer 14

when 6 or more teeth are missing (not counting 3rd molars)