Root resorption

Question 1

What is root resorption?

Answer 1

The non bacterial destruction of the dental hard tissues due to the interaction of clastic cells

Question 2

What initiates the resorption?

Answer 2

Damage to the surface of PDL, cementum and predentine causes stimulation of RANKL

Question 3

What are the two types of root resorption?

Answer 3

• Internal and external

Question 4

Two types of internal root resorption?

Answer 4

Inflammatory and replacement

Question 5

4 types of external root resorption?

Answer 5

• Inflammatory
• Replacement
• Cervical
• Surface

Question 6

2 radiographs to take for assessing root resorption?

Answer 6

• CBCT
• PA at two angles * 30 degrees*

Question 7

2 common clinical findings for internal inflammatory root resorption?

Answer 7

• Can be unrestored
• Positive to sensibility testing

Question 8

radiographic findings of internal root resorption?

Answer 8

• Centred in canal radiolucency that does not move with beam shift

Question 9

Pathogensis of internal inflammatory resorption?

Answer 9

• Coronal pulp necrosis

Question 10

Treatment for internal inflammatory resorption?

Answer 10

• Orthograde endodontics

Question 11

Clinical findings of internal replacement root resorption?

Answer 11

• Unrestored crown
• Positive to sensibility testing

Question 12

Radiographic finding of internal replacement root resorption?

Answer 12

Pulp obliteration

Question 13

2 clinical findings of external surface resorption?

Answer 13

• Increased mobility
• Positive to sensibility testing

Question 14

Radiographic finding of external surface resorption?

Answer 14

PDL intact

Question 15

Which teeth in orthodontic treatment are mostly affected by root resorption?

Answer 15

The ones used for anchorage

Question 16

How to manage external surface resorption?

Answer 16

• Remove the source and splint if mobile

Question 17

3 clinically findings of external inflammatory resorption?

Answer 17

• Tooth can be restored
• May have increased mobility
• Negative to sensibility testing due to necrotic pulp

Question 18

How to treat external inflammatory resorption?

Answer 18

• Remove cause of inflammation and endodontic treatment or XLA

Question 19

Clinical findings of external cervical resorption ?

Answer 19

• tooth can be restored
• May have periodontal pocketing
• Pink spot
• Positive to sensibility testing

Question 20

What may cause cervical resorption?

Answer 20

• Trauma - avulsion and luxation
• Viral infection
• Thyroid problems
• Orthodontics

Question 21

Treatment options for cervical resorption?

Answer 21

• Monitor - XLA - Prosthesis to replace space
  Surgical repair or internal repair and endodontics

Question 22

3 clinical findings of external replacement resorption?

Answer 22

• Infra-occluded
• High pitch note on percussion
• No physiological mobility

Question 23

Radiographic finding of replacement external resorption?

Answer 23

• no PDL space

Question 24

What is the aetiology of replacement external resorption?

Answer 24

• Avulsion
• Lateral luxation

Question 25

What is tx options for replacement resorption?

Answer 25

* Decoronation in yound patient then replace space * monitor in older patients and restore with composite