Resorption

Question 1

For resorption to occur, _______ to the protective unmineralized layers must occur

Author

Answer 1

damage
Tronstad

Question 2

Clasts cannot adhere to ________ such as ______ or ________

Answer 2

unmineralized tissue such as predentin or precementum

Question 3

Internal root resorption process

Answer 3

Pulpal injury causes some degree of coronal pulp necrosis
induced inflammation in the apical tissue
area of exposed dentinal tubules (loss of predentin and odontoblastic layer)

Question 4

_______% success rate for non-perforating IRR lesions, ______% for perforating

Answer 4

100%
25%

Question 5

ICRR requires

Answer 5

PDL in direct contact with dentin (loss of cementum)

Question 6

In ICRR, the outline of the pulp spaces usually remains _____

Answer 6

well defined

Question 7

Histology of ICRR

Answer 7

Fibro-osseous and fibro-vascular tissue associated with clastic cells

Question 8

True etiology of ICRR is likely _______

Answer 8

multifactorial

Question 9

Top etiological factors of ICRR

Answer 9

Orthodontics
Trauma
Internal bleaching

Question 10

Intracoronal bleaching often follows ______, which could have resulted in _______ at the CEJ

Answer 10

trauma
cemental defects

Question 11

Viral etiology for ICRR may invovle

Answer 11

Feline herpes virus
Von Arx

Question 12

Class I and II ICRR remain ______

Answer 12

localized to the cervical area

Question 13

Class III ICRR extends into the

Answer 13

coronal third of the root

Question 14

Class IV ICRR extends

Answer 14

beyond the coronal third of the root

Question 15

Treatment of ICRR includes

Answer 15

debridement of the defect
placement of glycerol on the gingival tissues
application of 90% trichloroacetic acid for 1-4 minutes
restoration of a GI cement

Question 16

TCA deactivates the resorptive tissue via ______

Answer 16

coagulative necrosis

Question 17

GI cements are indicated for resorption repair due to

Answer 17

ability of periodontal tissue to reattach

Question 18

Treatment of ICRR lesions classes _______ only is recommended

Answer 18

Classes 1-3

Question 19

ICRR treatment success rates

Author

Answer 19

1 and 2 – 100%
3 – 78%
4 – 12.5%
Heithersay

Question 20

EIRR is either _____ or ______ in origin

Answer 20

endodontic or orthodontic
Tronstad

Question 21

________% of apical periodontitis will have EIRR

Answer 21

86%

Question 22

EIRR will typically arrest when ______ or _______

Answer 22

RCT initiated
orthodontic movement ceases

Question 23

Extensive EIRR can result following _____

Answer 23

trauma

Question 24

Pathognomonic for replacement resorption

Answer 24

metallic tone on percussion

Question 25

EIRR results with loss of

Answer 25

protective precementum and cementoblastic layer

Question 26

Following resolution of inflammatory component of EIRR, _______ may occur

Answer 26

Replacement resorption

Question 27

Pressure resorption occurs in response to

Answer 27

direct damage to the precementum

Question 28

Pressure resorption is generally limited to the ______

Answer 28

apical third

Question 29

Pressure resorption often occurs secondary to (3)

Answer 29

Orthodontics
misaligned tooth eruption
slow-growing tumors or cysts