Chapter 2

Question 1

When do the crowns of deciduous teeth develop?

Answer 1

~14th week gestation through 12 months of age

Question 2

When do crowns of permanent dentition develop?

Answer 2

~6months to 15 years

Question 3

What is the term for teeth that have enamel defects seen in the permanent teeth caused by periapical inflammation of the overlying deciduous tooth?

Answer 3

Turner’s hypoplasia

Question 4

When is the critical period for children developing dental fluorosis?

Answer 4

2nd and 3rd year of life.

Question 5

Congenital syphilis can cause what type of odontogenic malformations?

Answer 5

Hutchinson’s incisors. The teeth will have a straight-edge screwdriver shape and the molars will be “mulberry molars.”

Question 6

What is the triad of congenital syphilis?

Answer 6

Hutchinson teeth, interstitial keratitis, and 8th nerve deafness.

Question 7

How would you ID these teeth?

Answer 7

Hutchinson Incisors

Question 8

How would you ID these teeth?

Answer 8

Mulberry Molars

Question 9

What is attrition?

Answer 9

Wear of teeth due to tooth to tooth contact.

Question 10

What is abrasion?

Answer 10

Wear of teeth due to pathologic wearing IE tooth brush.

Question 11

What is demastication?

Answer 11

Wear of teeth due to attrition and abrasion. IE chewing tobacco.

Question 12

What is erosion?

Answer 12

Wear of teeth due to a nonbacterial chemical process.

Question 13

What is perimolysis?

Answer 13

Wear of teeth due to gastric secretions.

Question 14

What is the term when teeth are fused by cementum?

Answer 14

Concrescence.

Question 15

What is anodontia?

Answer 15

Lack of tooth development.

Question 16

What is hypodontia?

Answer 16

Lack of one or more teeth.

Question 17

What is oligodontia?

Answer 17

Lack of 6+ teeth.

Question 18

List the most common teeth affect by hypodontia.

Answer 18

3rd molars, 2nd premolars, lateral incisors.

Question 19

What is a paramolar?

Answer 19

Devloping 4th molar.

Question 20

What is a mesiodens?

Answer 20

Supernumerary tooth inbetween maxillary incisors.

Question 21

What is it called when two teeth switch position during eruption?

Answer 21

Transposition.

Question 22

What are the most commonly impacted teeth?

Answer 22

Mand. 3rd molars, Max. 3rd molars, and Max. canine.

Question 23

What is gemination?

Answer 23

Single enlarged tooth. Looks like it is splitting into two. Tooth count will be normal when it is counted as one tooth.

Question 24

What is fusion?

Answer 24

Single enlarged tooth. Tooth count will be low when the tooth is counted as one.

Question 25

What is Riga fede disease?

Answer 25

Tramatic ulcers of soft tissue that may occur during breast feeding.

Question 26

What is this?

Answer 26

Riga fede disease

Question 27

What is this?

Answer 27

Talon Cusp

Question 28

What is dens evaginatus?

Answer 28

Elevation of the enamel located in the central groove of a tooth, often in the premolars. Very common in native americans and Inuits.

Question 29

What is this?

Answer 29

Dens evaginatus

Question 30

What is dens-in-dente?

Answer 30

Known as a tooth within a tooth. Deep surface invagination of the crown or root that is lined by enamel.

Question 31

What is the frequency of dens-in-dente?

Answer 31

Lateral incisors, central incisors, premolars, caninies, molars.

Question 32

What is this?

Answer 32

Dens-in-dente

Question 33

What is taurodontism?

Answer 33

An enlargement of the body and pulp chamber of a multi-rooted tooth.

Question 34

What are the three syndromes associated with taurodontism?

Answer 34

Kleinfelters Syndrome. Amelogenesis imperfect. Tricho-dento-osseous syndrome.

Question 35

What are the four aspects to tricho-dento-osseous syndrome?

Answer 35

Taurodontism, kinky hair, brittle nails, and osteosclerosis.

Question 36

What is this?

Answer 36

Hypercementosis

Question 37

What is hypercementosis?

Answer 37

non-neoplastic deposition of excessive cementum that is continuous with the normal radicular cementum.

Question 38

What disease is strongly associated with hypercementosis?

Answer 38

Paget's Disease.

Question 39

What direction will a dilaceration usually present?

Answer 39

Distal

Question 40

What are the three forms of amelogenesis imperfecta?

Answer 40

Hypoplastic, hypocalcified, and hypomaturation.

Question 41

What are the characteristics of the hypoplastic form of amelogenesis imperfecta?

Answer 41

It is the inadequate deposition of enamel matrix. Teeth will typically be more brown/yellow in color due to lack of enamel.

Question 42

What are the characteristics of the hypomaturation form of amelogenesis imperfecta?

Answer 42

It is when the enamel matrix is laid down appropriately, but there is a defect in the maturation of the crystal structure. The enamel will be soft and chips away with the "snow capped" teeth.

Question 43

What are the characteristics of the hypocalcified form of amelogenesis imperfecta?

Answer 43

This is when the enamel is laid down appropriately, but there is no mineralization.

Question 44

What is causing this?

Answer 44

Hypoplastica amelogenesis imperfecta

Question 45

What is causing this?

Answer 45

Hypoplastic amelogenesis imperfecta.

Question 46

What is causing this?

Answer 46

Hypomaturation amelogenesis imperfecta.

Question 47

What is causing this?

Answer 47

Hypomaturation amelogenesis imperfecta

Question 48

What is causing this?

Answer 48

Hypocalcified amelogenesis imperfecta

Question 49

What is causing this?

Answer 49

Hypocalcified amelogenesis imperfecta

Question 50

What causes dentinogenesis imperfecta?

Answer 50

Mutation of the dentin sialophosphoprotein gene.

Question 51

What is dentinogenesis imperfecta called when it occurs with osteogenesis imperfecta? How will patients eyes appear?

Answer 51

Osteogenesis imperfecta with opalescent teeth. Blue sclera

Question 52

How will the radiographs look with dentinogenesis imperfecta?

Answer 52

Bulbous crowns, cervical constrictions, thin roots, and early obliteration of canals and chambers.

Question 53

What is causing this?

Answer 53

Dentinogenesis imperfecta

Question 54

What is causing this?

Answer 54

Dentinogenesis imperfecta

Question 55

What are the characteristics of dentin dysplasia Type I

Answer 55

The crowns will appear normal, but the teeth will be rootless.

Question 56

What are the characteristics of dentin dyplasia type II?

Answer 56

It is closely related to dentinogenesis imperfecta(cant tell the difference). Root length is normal. On radiograph, will have thistle shaped chamber and canal anatomy.

Question 57

What is the term for a localized, non-hereditary developmental abnormality of the teeth with extensive adverse effects on the formation of enamel, dentin, and pulp?

Answer 57

Regional odontodysplasia.

Question 58

What is causing this? (note: it is only happening in a single quadrant.)

Answer 58

Regional odontodysplasia.