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BDS 4 - CDS - Periodontology > Root Resorption > Flashcards

Root Resorption Flashcards

1
Q

What is root resorption?

A

NON-BACTERIAL destruction of dental hard & soft tissue due to interaction of clast cells

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2
Q

How does resorption occur?

(In regards to RANKL)

A

Increase in RANKL allows for resorption through increased osteoclast activity

RANKL stimulated by:
- Bacterial LPS
- Trauma (physical, chemical)
- Chronic inflammation

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3
Q

what are surfaces on a tooth that help PREVENT resorption?

A
  • PDL
  • CEMENTUM
  • Predentine

When these are damaged, the resorption process is able to begin

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4
Q

What are the types of INTERNAL ROOT RESORPTION?

A
  • Inflammatory
  • Replacement
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5
Q

What are the types of EXTERNAL ROOT RESORPTION?

A
  • Inflammatory
  • Replacement
  • Cervical
  • Surface
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6
Q

what does INTERNAL resorption look like on a radiograph?

A

Uniform circular radiolucent area WITHIN canal space

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7
Q

How can you distinguish EXTERNAL resorption over INTERNAL resorption?

A

2 Radiographs taken

30 degree mesial or distal beam shift.

IF RADIOLUCENT AREA REMAINS OVER CANAL SPACE - Internal resorption

IF IT MOVES AWAY FROM CANAL SPACE - EXTERNAL

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8
Q

What are clinical findings of internal inflammatory resorption?

A
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9
Q

what is the radiographic finding for INTERNAL INFLAMMATORY resorption?

A
  • CENTRED IN CANAL, DOESNT MOVE with beam shift
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10
Q

PATHOGENESIS of internal inflammatory root resorption?

A
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11
Q

Tx of internal inflammatory root resorption?

A

NON-SURGICAL ENDO ONLY
- haemorrhage
- active irrigation
- intervisit medicament
- thermal obturation (hot GP)

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12
Q

Clinical findings of INTERNAL REPLACEMENT root resorption?

A
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13
Q

radiographic findings of internal replacement root resorption?

A

THINNING of Canal space as replaced with dentine

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14
Q

clinical findings of external surface resorption?

A
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15
Q

radiographic findings of external - surface resorption?

A

Loss of clarity in lamina dura,

loss of root, teeths root may appear shorter due to being resorbed away

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16
Q

AETIOLOGY of external - surface resorption?

A

Orthodontics:
- 90% of teeth have some form of external surface resorption (usually mind)
- The teeth used for anchorage are the ones worst affected

Ectopic teeth - pressure from erupting tooth

Pathological lesions

17
Q

Treatment for external - surface resorption?

A

PULP IS HEALTHY! - Endo wont help

Remove source to stop resorption

18
Q

Clinical findings of External - inflammatory resorption

A
19
Q

Radiographic findings of External - inflammatory resorption

A
  • Well defined radiolucency around the tooth roots
  • Loss of root outline/lamina dura clarity
20
Q

Aetiology of External - inflammatory resorption?

A
  • Pulp necrotic - Bacterial or dental trauma in origin
  • Periapical inflammatory lesion precipitates the resorption process

Majority of teeth with periapical lesions have microscope areas of root resorption

21
Q

Tx for external inflammatory resorption?

A
  • remove cause of inflammation

Usually endodontic tx, extractions also an option too

22
Q

clinical findings of External replacement resorption?

A
23
Q

Radiographic findings of external replacement resorption?

A

Loss of root outline as root is replaced with bone tissue

24
Q

Aetiology of external - replacement resorption?

A

Trauma - significant injuries to periodontium such that osteoclasts in contact with external root dentine

(E.g avulsion, lateral luxation)

25
Q

Tx option for external - replacement resorption?

A

Decoronation:

  • Remove crown to alveolar level then allow root to resorb
  • this preserves bone volume
  • adjacent teeth and periodontium develop normally
  • TOOTH REPLACEMENT WITH DENTURE OR Resin Bonded Bridge
26
Q

Clinical findings of external - cervical resorption

A
27
Q

Radiographic findings of External cervical resorption?

A
  • Well-defined radiolucent defect near CEJ
  • Marginal bone loss adjacent to affected tooth
  • Possible pulp involvement, widening or obliteration of pulp chamber
  • Widening of PDL space
28
Q

Risk factors for EXTERNAL - CERVICAL RESORPTION

A
  • Ortho
  • trauma (avulsion & luxation)
  • Wind instruments
  • viral infection
  • systemic disturbance - thyroid
29
Q

tx options of external cervical resorption?

A

-XLA & add prosthetic replacement

  • Internal repair & endodontics
30
Q

What resorption would require (orthograde) normal endodontics?

A
  • external INFLAMMATORY
  • internal INFLAMMATORY
31
Q

what resorption would require surgical endodontics?

A
  • external CERVICAL
32
Q

what resorption would NOT be suitable for any form of endodontics?

A
  • external REPLACEMENT
  • external SURFACE

BDS 4 - CDS - Periodontology (3 decks)

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