Acquired Dental Anomalies

Question 1

Acquired Dental Anomalies

Answer 1

Dental wear
Resorption
Pulpal calcifications
Hypercementosis

Question 2

Gradual loss of dental hard tissue as a result of chewing

Answer 2

Attrition

Question 3

Is attrition physiological or pathological

Answer 3

physiological

Question 4

Curved surfaces gradually altered to flat planes

Answer 4

Attrition

Question 5

Some factors may accelerate loss with attrition

Answer 5

Bruxism/grinding
Diet
Etc.

Question 6

What surfaces are effected by attrition

Answer 6

Incisal/occlusal surfaces

Question 7

Crowns shortened coronal-apically. Many adjacent teeth in each arch may show wear pattern

Answer 7

Attrition

Question 8

What can get worn away with attrition

Answer 8

Enamel may get worn away –> dentin becomes exposed –> deposition of secondary dentin
(Pt does not complain of pain due to this secondary dentin protecting the dentinal tubules)

Question 9

Attrition can cause a reduction in the size of the

Answer 9

pulp chambers and canals

Question 10

With attrition, incisal edges of mandibular incisors tend to become

Answer 10

pitted or “dished out”

Question 11

During attrition there is simultaneous widening of the

Answer 11

PDL space

Question 12

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

Answer 12

Abrasion

Question 13

3 causes of abrasion

Answer 13

Parafunctional habits (holding objects between teeth)
Poorly-fitting partial dentures or retainers
Brushing or dental floss injuries

Question 14

With abrasion, __ gets worn away and __ becomes exposed

Answer 14

enamel
dentin

Question 15

Radiolucent well-defined defects at the cervical level of teeth are from

Answer 15

Toothbrush injuries
(contralateral to dominant hand)
PIC

Question 16

Radiolucent semilunar well-defined defects in the interproximal surfaces at the cervical level of teeth are from

Answer 16

Dental floss injuries (distal)

Question 17

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

Answer 17

dental clasps of partial denture

Question 18

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

Answer 18

Erosion

Question 19

3 reasons for erosion

Answer 19

Excessive intake of acid beverages
Gastric reflux
Bulimia

Question 20

Smoothly outlined defects of enamel with underlying dentin

Answer 20

Erosion (surfaces effected depend on cause)

Question 21

If the restoration is showing and not flat with the dental wear this is an example of

Answer 21

Erosion
(Dentin> surrounding enamel > restorations)

Question 22

How is erosion shown on a radiograph

Answer 22

Well defined radiolucent defects on the crowns

Question 23

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

Answer 23

Abfraction

Question 24

Failure of enamel and dentin at a location away from the point of loading

Answer 24

Abfraction

Question 25

Sharp angles compared to a flatter smooth surface

Answer 25

Abfraction vs abrasion

Question 26

Removal of tooth structure by odontoclasts

Answer 26

Resorption

Question 27

Only section of the tooth with __ are susceptible to resorption

Answer 27

soft tissue coverage

Question 28

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

Answer 28

Physiological root resorption of primary teeth

Question 29

Odontoclasts resorb the outer surface of the tooth

Answer 29

External resorption

Question 30

The causes of external resorption is __

Answer 30

Excessive mechanical and occlusal forces Localized inflammatory lesions reimplanted teeth impacted teeth, tumors and cysts Unknown

Question 31

Apical root resorption associated with orthodontic treatment is an example of

Answer 31

External resorption (Mechanical and occlusal forces)

Question 32

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

Answer 32

Invasive cervical resorption

Question 33

Resorbed root from external resorption is replaced by

Answer 33

ingrowth of bone

Question 34

0.02%-2.3% (common) Asymptomatic Etiology and pathogenesis poorly understood

Answer 34

Invasive Cervical Resorption

Question 35

Invasive cervical resporption occurs most commonly with

Answer 35

Maxillary central incisors (then max canines)

Question 36

Odontoclasts resorb the dentin wall of pulp chamber or root canal

Answer 36

Internal resorption

Question 37

Focal enlargement of the pulp space

Answer 37

Internal resorption

Question 38

Internal resorption is probably related to

Answer 38

inflammation (acute trauma, pulp capping, pulpotomy)

Question 39

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

Answer 39

Internal resorption

Question 40

This is important for proper diagnosis of resorptive lesions

Answer 40

CBCT (Tells you if its internal or external cause)

Question 41

Changes in pulpal tissue resulting in mineralization

Answer 41

Pulpal calcifications

Question 42

Function of the pulp

Answer 42

Dentin formation and nutrition

Question 43

Deposited in the pulp structures, physiologic process, slow and continuous. Related to aging

Answer 43

Secondary dentin

Question 44

Additional deposition related to stimuli

Answer 44

Tertiary dentin

Question 45

Common idiopathic calcifications, freely in tissue or attached to wall, usually round radiopacities, no treatment requires

Answer 45

Pulp stones

Question 46

Idiopathic calcification, associated with older age (may be related to trauma). Diffuse ill-defined, no treatment required, difficulty for endodontic procedures

Answer 46

Pulpal sclerosis

Question 47

Excessive deposition of cementum on the tooth roots

Answer 47

Hypercementosis

Question 48

3 possible causes of hypercementosis

Answer 48

Supraerupted tooth (lost opposing tooth) Periapical inflammation Paget disease of bone hyperpituitarism

Question 49

Roots appear thickened on radiographs. Difference in radiopacity cementum vs dentin

Answer 49

Hypercementosis

Question 50

Continuity of the __ and the __ that encompasses the extra cementum with hypercementosis

Answer 50

lamina dura PDL space