Root Resorption

Question 1

what is the definition of root resorption

Answer 1

non-bacterial destruction of dental hard and soft tissue due to the interaction of clastic cells

Question 2

what are the key features of the clastic cells

Answer 2

very motile
ruffled border
in contact with dentine

Question 3

what stimulates resorption

Answer 3

RANKL

Question 4

what stimulates RANKL for resorption

Answer 4

parathyroid hormone
bacterial lipopolysaccharides
trauma
chronic inflammation

Question 5

what does RANKL do

Answer 5

promote development

Question 6

what does OPG do

Answer 6

inhibit RANKL and development

Question 7

what are the surfaces of the root acting to prevent resorption

Answer 7

periodontal ligament
cementum
predentine

Question 8

what are the main classifications of root resorption

Answer 8

internal and external

Question 9

what are the types of internal root resorption

Answer 9

inflammatory
replacement

Question 10

what are the types of external root resorption

Answer 10

inflammatory
replacement
cervical
surface

Question 11

what do we look for when examining the coronal integrity of remaining tooth

Answer 11

if it can be restored after treatment

Question 12

what do we look for when looking at the colour of the tooth

Answer 12

pink spots

Question 13

why do we look for pocketing when examining a tooth

Answer 13

to see if there is periodontal communication with the resorption

Question 14

what would a sinus in the mucogingival junction indicate

Answer 14

internal resorption has perforated the root canal

Question 15

what are swelling and apical tenderness associated with

Answer 15

periradicular disease

Question 16

what radiographs do we need when assessing resorption

Answer 16

2 angles for parallax
or CBCT

Question 17

what are the notable clinical findings for internal inflammatory resorption

Answer 17

everything is normal with positive sensitivity testing

Question 18

what is seen on radiographs with internal inflammatory resorption

Answer 18

parallel canals lost
radiolucency in canal does not move with beam shift

Question 19

what is the pathogenesis of internal inflammatory resorption

Answer 19

coronal pulp necrotic
inflammatory and vascular tissue in lesion
apical pulp vital to power progression of resorption

Question 20

how do you treat internal inflammatory resorption

Answer 20

endodontics only

Question 21

what are the notable clinical findings with internal replacement resorption

Answer 21

everything is normal with positive sensitivity testing

Question 22

what are the radiographic findings with internal replacement resorption

Answer 22

mineralised tissue within the canal forming trabecular shape

Question 23

what is the treatment for internal replacement resorption

Answer 23

need to wait until symptomatic to take it out as cant get files through the mineralised tissue

Question 24

what are the notable findings for external surface resorption

Answer 24

increased physiological mobility
positive sensitivity

Question 25

what are the radiographic findings for external surface resorption

Answer 25

very short resorbed roots PDL intact sometimes radiolucency from ectopic tooth

Question 26

what is the aetiology for external surface resorption

Answer 26

ectopic teeth pathological lesions idiopathic

Question 27

what is the treatment for external surface resorption

Answer 27

remove the source splint if mobile

Question 28

what are the notable clinical findings for external inflammatory resorption

Answer 28

possible sinus/swelling/apical tenderness/percussion sometimes increased mobility negative to sensitivity (necrotic pulp)

Question 29

what is seen radiographically with external inflammatory resorption

Answer 29

large periapical radiolucencies roots resorbed from apex upwards

Question 30

what is the aetiology of external inflammatory resorption

Answer 30

necrotic pulp periapical inflammatory lesion precipitates resorption process

Question 31

how do you treat external inflammatory resorption

Answer 31

remove cause of inflammation orthograde endodontic treatment possibly surgical endodontics extraction

Question 32

what are the notable findings from external replacement resorption

Answer 32

infra occluded high pitched note no physiological mobility positive sensitivity

Question 33

what can be seen radiographically for external replacement resorption

Answer 33

no PDL

Question 34

what is the aetiology for external replacement resorption

Answer 34

trauma (avulsion or lateral luxation)

Question 35

when would you decoronate for replacement resorption

Answer 35

if infraocclusion more than 1mm in growing patient

Question 36

why would you choose to decoronate

Answer 36

to preserve bone volume

Question 37

what are the treatment options for external replacement resorption

Answer 37

decoronation monitor add composite incisally to lengthen tooth

Question 38

what are the notable clinical findings for external cervical resorption

Answer 38

pocketing with profuse BOP pink spot positive sensitivity

Question 39

what can be seen radiographically with external cervical resorption

Answer 39

radiolucency in the canal which moves when you look at it from another angle

Question 40

what protects the pulp from external cervical resorption

Answer 40

predentine

Question 41

what are the risk factors for developing external cervical resorption

Answer 41

orthodontics trauma historical non-vital whitening with heat wind instruments viral infection systemic disturbance

Question 42

what are the treatment options for external cervical resorption

Answer 42

monitor - continued resorption extract internal repair and endodontics

Question 43

what types of resorption use orthograde endodontics as treatment options

Answer 43

external inflammatory internal inflammatory

Question 44

what types of resorption use surgical endodontics as treatment option

Answer 44

external cervical

Question 45

what treatments do not use endodontics at all for treatment

Answer 45

external replacement external surface