Chapter 2

Question 1

Answer 1

Tetracycline staining

Intrinsically permanently stained - incorporated by ameloblasts

Question 2

Answer 2

Turner’s Hypoplasia

Periapical inflammatory disease of overlying deciduous

Enamel defects of the permanent teeth

Permanent Bicuspids

Question 3

Answer 3

Dental Fluorosis

Excess amounts of fluoride result in significant enamel defects

During tooth development (2nd and 3rd years), don’t use fluoridated toothpaste

Optimum fluoridation of drinking water –> .7ppm

Question 4

Congenital Syphillis

Answer 4

Rare

Hutchinsons incisors

Mulberry molars

Question 5

Answer 5

Mulberry Molars

*Congenital Syphillis*

Question 6

Answer 6

Hutchinson’s Incisors

*Congenital Syphillis*

Question 7

Hutchinson’s Triad

Answer 7

Hutchinson’s Teeth

Interstitial Keratitis (corneal scarring)

8th nerve deafness

Saddle nose (may manifest in leprosy as well)

Question 8

Answer 8

Abrasion

Question 9

Answer 9

Erosion

Question 10

Answer 10

Abfraction

Question 11

Impacted Teeth

Answer 11

Mandibular 3rd molars > Maxillary 3rd molars > Maxillary Canines

Question 12

Answer 12

Ankylosis

No PDL

Fuses to the bone – WILL NOT ERUPT

Failure of the tooth to reach the occlusal plane

Primary or permanent

Question 13

Anodontia

Answer 13

Lack of tooth development

Occur in the presence of Hereditary hpohidrotic ectodermal dysplasia (absence of ectodermal tissue development)

Question 14

Hypodontia

Answer 14

Lack of one ore more teeth

Abscence of deciduous tooth –> Likely to miss associated permanent tooth (develop from the same dental lamina)

Ectodermal Dsyplasia –> Conical shaped teeth

Question 15

Oligodontia

Answer 15

Lack of 6+ teeth

Question 16

Hyperdontia

Answer 16

Supernumerary teeth

Question 17

Mesiodens

Answer 17

supernumerary tooth that develops in the MAXILLARY incisal region between centrals

Question 18

Answer 18

Dental Transposition

Teeth flip positions and grow not in the normal location

Question 19

Answer 19

Rege Fede Disease

Traumatic ulcerations of the adjacent soft tissue from neonatal teeth that may occur during breast feeding

Question 20

Gemination

Answer 20

Single enlarged tooth or joined teeth in which the tooth count is normal when the anomalous toot is counted as one

single pulp chamber

Question 21

Fusion

Answer 21

Single enlarged tooth or joined teeth in which the tooth count reveals a missiong tooth when the anomalous tooth is counted as one

Two different pulp chambers

Question 22

Concrescence

Answer 22

Union of two adjacent teeth by cementum alone without confluence of underlying dentin

Question 23

Answer 23

Dilaceration

A bend in the tooth – usually distally

Mandibular 3rd molars

Question 24

Answer 24

Dens Evaginatus

External growth of the tooth

PREMOLAR teeth

100% prevalence in NATIVE AMERICANS

May have a pulp horn

Question 25

Answer 25

Dens - in Dente (Dens invaginatus) Deep surface invagination of the crown or rooot that is line by enamel **Permanent LATERAL incisors**

Question 26

Answer 26

Taurodontium Elargement of the body and pulp chamber of a multi-rooted tooth Apical displacement of the pulpal floor Isolated or Syndromic Syndromes: \* Kleinfelter's syndrome (XXY) \* Amelogenesis imperfecta \* Trich-dento-osseous syndrome

Question 27

Answer 27

Hypercementosis Non neoplastic depositio of excessive cementum - continuous with radicular cementum Threat --\> for extraction of tooth Local factors: Occlusal trauma, Adjacent inflammation Systemic Factors: Paget's Disease of bone

Question 28

Paget's Disease of bone

Answer 28

Associated with generalized hypercementosis

Question 30

Amelogenesis Imperfecta

Answer 30

AD inherited Developmental alterations of the structure of enamel No systemic disorder Permanent and Primary teeth affected

Question 31

Hypoplastic Amelogenesis Imperfecta

Answer 31

Inadequate deposition of the enamel matrix Pinpoint pitting on tooth surface

Question 33

Answer 33

Hypomaturation amelogenesis imperfecta Enamel matrix is laid down **Defect in maturation of the enamel's crystals** Snow-capped white opaque enamel on incisal or occlusal 1/3

Question 34

Answer 34

Hypocalcified amelogenesis imperfecta Matrix is laid down and teeth are normal shape Enamel is soft ant is easily lost **Enamel is yellow-brown or orange - rapid calculus apposition**

Question 35

Answer 35

Dentinogenesis Imperfecta **Mutation of the DSPP - dentin sialophosphoprotein gene** Primary or permanent. Blue to brown discoloration with distinctive translucence Xray: Bulbous crown, cervical constriction, thin roots, early obliteration of pulp chambers Shell teeth --\> normal thickness enamel, enlarge pulp chamber

Question 36

Answer 36

Dentinogenesis imperfecta

Question 37

Answer 37

Shell tooth ## Footnote **Dentinogenesis imperfecta**

Question 38

Dentin Dysplasia

Answer 38

Type I and Type II Autosomal dominant

Question 39

Answer 39

Dentin Dysplasia Type I **Rootless Teeth** Clinically normal -- usually mobile Enamel and coronal dentin are normal Radicular dentin looses organization and is shortened dramatically

Question 40

Answer 40

Dentin Dysplasia Type 2 **Blue-Amber Brown translucence** Root length is normal Altered pulp anatomy -- thistle tube shaped teeth, pulp stones

Question 41

Regoinal Odontodysplasia

Answer 41

Localized, **NON HEREDITARY** abnormality of teeth None of tooth tissues form correctly "GHOST TEETH" Usually one quadrant Clinically --\> NO TEETH PRESENT

Question 42

Aminacycline Staining

Answer 42

Causes blue roots or dark crown Typically found in 3rd molars (medication taken for acne)

Question 43

Perimolysis

Answer 43

Gastric Secretions Related to erosion