Developmental Abnormalities of tooth Structure

Question 1

name the abnormalities of tooth structure

Answer 1

1. enamel hypoplasia
2. enamel hypocalcification
3. regional odontodysplasia
4. intrinsic staining

Question 2

name the abnormality of the tooth structure when it is incomplete or defective formation of enamel; as a result of disruption of emeloblast metabolism during enamel production

Answer 2

enamel hypoplasia

Question 3

what are the causes of enamel hypoplasia

Answer 3

1. amelogenisis imperfect
2. congenital syphilis
3. febril illness (fever)
4. vitamin deficiency
5. too much systemic fluoride
6. birth injury/premature birth
7. local infection of deciduous tooth

Question 4

what are the characteristics of the causes by Febrile illness/vitamin Deficiency

Answer 4

1. febrile illness: measles, chicken pox, scarlet fever
2. vitamin deficiency : Vitamin a, c,d
3. both can cause pitting of enamel in horizontal rows

Question 5

what are the characteristics of the causes by Local infection/trauma

Answer 5

1. “turner’s spot of tooth
2. carious deciduous tooth with periapical involvement can disturb ameloblasts
3. teeth most often affected MX permanent incisors
4. color may vary from yellow to brown

Question 6

name the abnormality of the tooth structure that is caused by ingesting high concentration of systemic fluoride during tooth formation and teeth are decay resistant but stained

Answer 6

fluorosis

Question 7

explain the abnormality of the tooth structure that is caused by syphilis and affects the incisors and molars

Answer 7

congenital syphilis

Question 8

explain the abnormality of the tooth structure caused by birth injury/permanent birth

Answer 8

ameloblasts are so sensitive, even a long traumatic birth or change in environment at birth , can cause some hypoplasia
sometimes cause is unknown

Question 9

name the characteristics of the dentition affected by congenital syphilis

Answer 9

1. hutchenson’s incisors–screw driver shaped

2. mulberry molars–globules of enamel instead of cusps

Question 10

name the abnormality of the tooth structure that affect the maturation of the enamel matrix and usually appears as localized chalky, white spot on middle 1/3 of crown; possible cause may be trauma during maturation stage

Answer 10

hypocalcification

Question 11

name the abnormality of the tooth structure due to deposition of substance circulating systemically during tooth formation (e.g. tetracycline–yellowish, green, grey discoloration of dentin

Answer 11

intrinsic staining

Question 12

name the abnormality of the tooth structure caused by bleeding of the crown

Answer 12

pink tooth of mummery

Question 13

name the abnormality of the tooth structure also known as “ghost teeth”
very thin enamel and dentin, with very large pulp chambers;

Answer 13

regional odontodysplasia

***if erupted, typically nonfunctional and malformed

Question 14

name the abnormality of the tooth structure when teeth that can’t erupt because of a physical obstruction and is one of the most common developmental defects in humans and most commonly seen in 3rd molars

Answer 14

impacted teeth

Question 15

name the abnormality of the tooth structure when deciduous teeth in which the cementum and bone are fused preventing exfoliation; tooth won’t come out on its own in a child or an adult

Answer 15

ankylosed teeth