Clinical Radiology - Acquired Dental Anomalies

Question 1

Which acquired dental anomalies have to do with dental wear?

Answer 1

Attrition
Abrasion
Erosion
Abfraction

Question 2

Which acquired dental anomalies have to do with resorption?

Answer 2

Internal resorption
External resorption

Question 3

What are the 4 categories of acquired dental anomalies?

Answer 3

Dental wear
Resorption
Pulpal calcifications
Hypercementosis

Question 4

Gradual loss of dental hard tissue as a result of chewing

Answer 4

Attrition

Question 5

Curved surfaces of teeth are gradually altered to flat planes

Answer 5

Attrition

Question 6

What factors may accelerate attrition?

Answer 6

Bruxism, diet

Question 7

Crowns shortened coronal-apically; many adjacent teeth in each arch may show wear pattern

Answer 7

Attrition

Question 8

Incisal edges of mandibular incisors become pitted or “dished out”

Answer 8

Attrition

Question 9

In both attrition and abrasion:

Enamel wears away, dentin becomes exposed, and there is deposition of secondary dentin. What does this cause?

Answer 9

Decreased pulpal space

Question 10

There is a reduction in the size of pulp chamber and canals, but the PDL space widens

Answer 10

Attrition

Question 11

Gradual loss of dental hard tissue as a result of external mechanical action

Answer 11

Abrasion

Question 12

Which acquired dental anomaly?

Parafunctional habits (holding objects btwn teeth, toothpicks)
Poorly-fitting partial denture or retainer
Brushing or floss injuries (hard bristles, abrasive toothpaste, excessive pressure)

Answer 12

Abrasion

Question 13

What type of injury causing abrasion?

Radiolucent, well-defined defects at cervical level of teeth; contralateral to dominant hand

Answer 13

Toothbrush injury

Question 14

What type of injury causing abrasion?

Radiolucent, semilunar, well-defined defects in the interproximal surfaces of the cervical level of teeth; usually more present on distal side

Answer 14

Floss injury

Question 15

What type of injury causing abrasion?

Radiolucent, semilunar, well-defined defect in distal surfaces at the cervical level of teeth

Answer 15

Poorly-fitting partial denture

Question 16

Gradual loss of dental hard tissue as a result of chemical injuries (not involving bacteria)

Answer 16

Erosion

Question 17

Caused by excessive intake of acid beverages, gastric reflux, and bulimia

Answer 17

Erosion

Question 18

Smoothly outlined defects on enamel and underlying dentin

Answer 18

Erosion

Question 19

Dentin, enamel, and restoration are all worn to the same level

Answer 19

Attrition

Question 20

Dentin and enamel are worn to the same level, but restorations are elevated

Answer 20

Erosion

Question 21

Loss of tooth structural from occlusal stresses that create repeated tooth flexure

Answer 21

Abfraction

Question 22

Failure of enamel and dentin at a location away from the point of loading (usually result of occlusal forces)

Answer 22

Abfraction

Question 23

Creates sharp angles/edges at gum line

Answer 23

Abfraction

Question 24

Creates flatter, smooth surface at gum line

Answer 24

Abrasion

Question 25

Removal of tooth structure by odontoclasts

Answer 25

Resorption

Question 26

Only sections of the tooth that are covered by ________ __________ are susceptible to resorption. This means resorption usually happens on the _______

Answer 26

soft tissue; root

Question 27

Progressive resorption of deciduous tooth that result in shedding and subsequent eruption of permanent tooth

Answer 27

Physiological root resorption

Question 28

Odontoclasts resorb the outer surface of the tooth

Answer 28

External resorption

Question 29

What type of resorption? Excessive mechanical (ortho) and occlusal forces Localized inflammatory lesions Reimplanted teeth Impacted teeth, tumors, and cysts Unknown

Answer 29

External

Question 30

Blunting of roots

Answer 30

External resorption

Question 31

Localized, subepithelial, supra-osseous resorptive process of the tooth

Answer 31

Invasive cervical resorption

Question 32

Asymptomatic; etiology and pathogenesis are poorly understood

Answer 32

Invasive cervical resorption

Question 33

What type of Invasive cervical resorption? Supracrestal - at level of CEJ

Answer 33

Invasive cervical resorption Class 1

Question 34

What type of Invasive cervical resorption? Coronal 1/3

Answer 34

Invasive cervical resorption Class 2

Question 35

What type of Invasive cervical resorption? Subcrestal - into middle 1/3

Answer 35

Invasive cervical resorption Class 3

Question 36

What type of Invasive cervical resorption? Apical 1/3

Answer 36

Invasive cervical resorption Class 4

Question 37

Odontoclasts resorb the dentin wall of pulp chamber or root canal

Answer 37

Internal resorption

Question 38

Focal enlargement of the pulp space

Answer 38

Internal resorption

Question 39

Etiology is unknown; probably related to inflammation - acute trauma, pulp capping, pulpotomy

Answer 39

Internal resorption

Question 40

Radiolucent localized round, oval, or elongated lesions, continuous with image of the pulp chamber or root canal; sharply defined or diffuse

Answer 40

Internal resorption

Question 41

Important for proper diagnosis of resorptive lesions and treatment planning

Answer 41

CBCT

Question 42

Changes in pulpal tissue resulting in mineralization

Answer 42

Pulpal calcifications

Question 43

What is the function of the pulp?

Answer 43

Dentin formation and nutrition

Question 44

What type of dentin? Deposited in pulp structures Physiologic process, slow, continuous Related to aging

Answer 44

Secondary dentin

Question 45

What type of dentin? Additional deposition related to stimuli

Answer 45

Tertiary dentin

Question 46

Common idiopathic calcifications Freely in tissue or attached to wall Usually round radiopacities No treatment required

Answer 46

Pulp stones

Question 47

Idiopathic calcifications Associated with older age May be related to trauma Diffuse, ill-defined Difficulty for endodontic procedures due to calcified canals No treatment required

Answer 47

Pulpal sclerosis

Question 48

Excessive deposition of cementum on tooth roots

Answer 48

Hypercementosis

Question 49

Can be caused by: Supraerupted tooth (lost opposing tooth) Periapical inflammation Paget Disease of bone and Hyperpituitarism Unknown

Answer 49

Hypercementosis

Question 50

Roots appear thickened on X-Rays

Answer 50

Hypercementosis

Question 51

Difference in radiopacity of cementum vs dentin

Answer 51

Hypercementosis

Question 52

Continuity of the lamina dura and the PDL space that encompasses the extra cementum

Answer 52

Hypercementosis