Dental Anomalies

Question 1

Defines as something noticeable different or deviates from that which is ordinary or normal

Answer 1

Anomaly

Question 2

A congenital or acquired abnormality in which a tooth or teeth deviate from normal form, function, and position

Answer 2

Dental Anomaly

Question 3

What are the 2 dental anomalies based on the size of teeth?

Answer 3

1. Microdontia
2. Macrodontia

Question 4

Teeth which are smaller than normal teeth and is outside the usual limits of variation

Answer 4

Microdontia

Question 5

All teeth are smaller than normal and is common in dwarfism

Answer 5

True Generalized Microdontia

Question 6

This is normal or slightly smaller than normal teeth present in jaws that are somewhat larger than normal and results to spacing

Answer 6

Relative Generalized Microdontia

Question 7

A common condition where the most commonly affected teeth are maxillary lateral incisor and third molar

Answer 7

Microdontia involving only a single tooth

Question 8

Refers to teeth that are larger than normal

Answer 8

Macrodontia

Question 9

All teeth are larger than normal

Answer 9

True Generalized Macrodontia

Question 10

This is more common and there is the presence of normal or slightly larger than normal teeth in small jaw resulting to crowding of teeth

Answer 10

Relative Generalized Macrodontia

Question 11

A common type of macrodontia

Answer 11

Macrodontia of a single tooth

Question 12

What are the 9 dental anomalies in shape?

Answer 12

1. Gemination
2. Fusion
3. Concrescence
4. Taurodontism
5. Hutchinson’s Teeth
6. Talon’s Cusp
7. Dens In Dente
8. Dens Evaginatus
9. Dilaceration

Question 13

Also known as twinning and is an anomaly that arises when a tooth attempts to divide itself or partially twin itself, by splitting its tooth germ

Answer 13

Gemination

Question 14

Usually one with two completely or incompletely separated crowns that have a single root or root canal

Answer 14

Gemination

Question 15

Occurs when two adjacent tooth germs unite and are joined by their crowns or their roots

Answer 15

Fusion

Question 16

Fusion which occurs after root formation has been completed, whereby teeth are united by cementum only

Answer 16

Concrescence

Question 17

What are the 2 causes of concrescence?

Answer 17

a. Traumatic injury
b. Crowding of the teeth with the resorption of the interdental bone

Question 18

Resembles an eagle’s talon and commonly affects maxillary and mandibular permanent incisors

Answer 18

Talon’s Cusp

Question 19

Appearance of Talon’s Cusp

Answer 19

a. Cusp blend smoothly with the tooth except that there is a deep developmental groove where the cusp blends with the sloping lingual tooth surface
b. Composed of normal enamel and dentin and a horn of pulp tissue

Question 20

3 problems of Talon’s Cusp

Answer 20

1. Esthetics
2. Caries control
3. Occlusal accommodation

Question 21

What are the 2 other names for dens in dente?

Answer 21

Dens Invaginatus and Dilated Composite Odontome

Question 22

The tooth commonly affected in this anomaly is the maxillary permanent lateral incisors

Answer 22

Dens In Dente

Question 23

What are the 3 causes of invagination?

Answer 23

1. Increased localized external pressure
2. Focal growth retardation
3. Focal growth stimulation in certain area of the tooth bud

Question 24

What is the radiographic appearance of dens in dente?

Answer 24

Pear-shaped invagination of enamel and dentin

Question 25

4 other names for dens evaginatus

Answer 25

1. Occlusal Tuberculated Premolar 2. Leong's Premolar 3. Evaginated Odontome 4. Occlusal Enamel Pearl

Question 26

Clinical appearance of dens evaginatus

Answer 26

Accessory cusp or globule of enamel on the occlusal surface between the buccal and lingual cusps of premolars; may be unilateral or bilateral

Question 27

3 clinical significance of dens evaginatus

Answer 27

1. May contribute to incomplete eruption of the teeth 2. May contribute to displacement of the teeth 3. May contribute to pulp exposure with subsequent infection following occlusal wear or fracture

Question 28

Bull-like tooth wherein there is enlargement of the body of the tooth at the expense of the root

Answer 28

Taurodontism

Question 29

Clinical appearance of taurodontism

Answer 29

a. Seen both in either the deciduous or permanent teeth, but more common to permanent teeth b. May be unilateral or bilateral

Question 30

4 radiographic features of taurodontism

Answer 30

1. Rectangular in shape 2. Pulp chamber is extremely large with a much greater apico-occlusal height than normal 3. Pulp lacks constriction at the cervical of the tooth 4. Roots extremely short with bifurcation or trifurcation only a few millimeters above the apices of the roots

Question 31

An angulation of the root or crown of formed tooth

Answer 31

Dilaceration

Question 32

Cause of dilaceration

Answer 32

Trauma

Question 33

Common locations of dilaceration

Answer 33

1. Cervical portion 2. Middle third of the root 3. Apical third of the root

Question 34

Clinical consideration of dilaceration

Answer 34

Difficulty in extraction

Question 35

This is a congenital anomaly that is associated with syphilis and there is notching at incisal edge and narrowing of incisors

Answer 35

Hutchinson's Teeth

Question 36

4 anomalies of the roots of the tooth

Answer 36

1. Short root 2. Long root 3. Enamel pearl 4. Supernumerary root

Question 37

What are the 2 dental anomalies in number?

Answer 37

1. Anodontia 2. Supernumerary teeth

Question 38

All teeth are missing and may involve both deciduous or permanent dentition

Answer 38

Total Anodontia

Question 39

A common congenital condition characterized by absence of one or more teeth

Answer 39

Partial Anodontia or Hypodontia

Question 40

Absence of many teeth, usually associated with small size of the existing teeth and other anomalies

Answer 40

Oligodontia

Question 41

Occurs as a result of extraction of all teeth, clinically absent teeth

Answer 41

Induced or False Anodontia

Question 42

Teeth are missing clinically but are formed but failed to erupt in the oral cavity

Answer 42

Pseudoanodontia

Question 43

Teeth in excess of the normal number

Answer 43

Supernumerary teeth

Question 44

Possible causes of supernumerary teeth:

Answer 44

a. Developed from a third tooth bud but arising from the dental lamina near the permanent tooth bud b. Splitting of permanent tooth bud c. Hereditary

Question 45

A tooth situated between the maxillary central incisors and appears or occurs singly, paired erupted or impacted, occasionally inverted

Answer 45

Mesiodens

Question 46

Small tooth with a cone shaped crown and a short root

Answer 46

Mesiodens

Question 47

A supernumerary molar usually small and situated buccally or lingually to one of the maxillary molars, or interproximal between the 1st, 2nd, 3rd molars

Answer 47

Paramolar

Question 48

Supernumerary teeth that erupt outside the dental arch

Answer 48

Peridentes

Question 49

Teeth which erupt within the first 30 days after birth

Answer 49

Neonatal Teeth

Question 50

More common than neonatal teeth and erupts at birth that commonly affects the mandibular central incisor

Answer 50

Natal teeth