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3. Paediatrics > Trauma 2 - (Root #) > Flashcards

Trauma 2 - (Root #) Flashcards

1
Q

what is a root fracture?

A

This is where there is involvement of dentine, cementum and pulp involvement

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2
Q

What are traumatic root fractures?

A

Horizontal - most at an angle

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3
Q

What fractures can post crowns and restorative materials cause?

A

Vertical root fractures

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4
Q

How do we classify root fractures? 3

A

POSITION

DISPLACEMENT OF FRAGMENTS

STAGE OF ROOT DEVELOPMENT

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5
Q

What are the positions of root fragment?

A

apical 1/3
middle 1/3
coronal 1/3

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6
Q

What does displaced mean?

A

This means the fragments have been pushed apart

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7
Q

What does undisplayed mean?

A

Edges of fractured fragments are still together

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8
Q

What are the two stages of root development?

A

Mature - closed

Immature - open

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9
Q

What are apical root fractures?

A

fractures in apical 1/3 of tooth that can be difficult to see -

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10
Q

Prognosis of apical root fractures?

A

very good - especially if no displacement has occurred

if healing Is well then often fracture line can be undetecable

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11
Q

What is important with middle 3rd root fractures?

A

we must reduce the fracture as much as possible - GET BOTH HALVES TOUCHING AGAIN LIKE A JIGSAW

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12
Q

What is reduction?

A

when we get fragments to touch again or as close as

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13
Q

What is the prognosis of coronal 3rd root fractures?

A

Poor - very little PDL support to keep crown in position during function - eating etc

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14
Q

What is the issue with coronal 3rd root fractures?

A

Unfavourable crown:root ratio - crown is barely being held in - very mobile and will all out

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15
Q

How will teeth look with coronal 3rd root fractures?

A

They may look great but radiographs show the extend of how bad it is

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16
Q

What can fracture line look like on a radiograph sometimes?

A

occasionally looks like several fracture lines when break has occurred at an angle cutting across the beam - in reality only one fracture line

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17
Q

What does prognosis of fractured tooth depend on?

A

Age of child - immature or mature?

Degree of displacement - how well can we reduce teeth?

associated injuries? - has crown fractures too?

time between injury and tx - if we don’t reduce quickly then clot forms between two fragments making reduction v hard

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18
Q

What happens if we don’t do tooth fragment reduction quickly?

A

blood clot forms between two bits and reduction is much harder

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19
Q

What is the root fracture exam and investigations involve?

A

Clinical exam - trauma stamp

SIs:

  • sensibility testing
  • radiographs from two angles (2x pas from diff angles and maxillary occlusal)
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20
Q

What is the tx plan for a apical or middle third fracture which has displaced?

A
  1. clean area with water, saline or CHX
  2. Reposition tooth with digital pressure
  3. splint - flexible for 4 weeks
  4. review - 6-8wks, 6mths, 1 year, 5years
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21
Q

What does coronal third root fracture always need?

A

Flexible splint for 4 months

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22
Q

Do we require LA for reduction and splinting?N

A

Not always - depends on pt if in pain YES!

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23
Q

What advice do we give post reduction and splinting?

A

Soft diet for 1 week
no contact sports
good OH

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24
Q

How long is a splint placed for in middle and apical third fractures?

A

FLEXIBILE SPLINT 4 WEEKS

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25
Q

What are the healing outcomes following reduction?

A
  1. calcified tissue union across fracture line
  2. connective tissue healing
  3. calcified and ct healing
  4. bone and osseous healing
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26
Q

What is Calcified tissue union across fracture line

A

this is where the fracture is healing with dentine like material - will be v hard to see previous fracture line on second radiograph

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27
Q

What is connective tissue healing?

A

This is when the fracture line will always be obvious in radiographs

there is rounding off of edges as bone cells nibble away at edge of corners as they are sharp

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28
Q

What is eburnation?

A

o Rounding off edges – bone cells nibble away at edge of corners as they are sharp

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29
Q

What is bone and osseous healing?

A

This is when bony healing occurs - two diff segments become unique entities that aren’t associated with each other - we can trace the PDL between both parts

30
Q

How do we tell how the fracture has repaired?

A

calcified tissue union - no fracture line

CT - eburnation (rounding off off of edges and fracture line still present)

bone and osseous healing - two separate entities

31
Q

what are the chances of tooth becoming non vital?

A

20%

32
Q

What do we do for a NV tooth with apical and middle third fracture lines?

A

we would extirpate pulp to fracture line
dress with non setting cash then MTA/biodetine to coronal fracture line

then GP fill to fracture line

33
Q

What are the types of PDL injuries?

A

Concussion

Subluxation

Extrusion

Lateral Luxation

Intrusion

Avulsion

Dentoalveolar fractures

34
Q

What is a concussion injury?

A

This is where there is an injury to tooth supporting structures WITHOUT inc mobility or displacement of the tooth

Pain to percussion
no gingival bleeding

No need to splint

35
Q

What is a subluxation injury?

A

this is an injury to tooth supporting structures resulting in inc mobility and pain to percussion but NO displacement of tooth

Bleeding from gingival sulcus may be present

  • inc mob, bleeding from gums
36
Q

What can we provide for subluxation injury?

A

splint for 2 weeks but not needed - flexible splint (helps put pt at ease esp if in pain or if teeth move)

occlusal relief - if pt has a heavy bite we can remove part of tooth tissue or build up posterior teeth to take pressure off occlusion - prop dentition open with GI

37
Q

When might we do occlusal relief?

A

If pt has heavy bite - can help relieve pain

38
Q

What is the review process fro subluxation?

A

4 weeks
6-8 weeks
1 year

39
Q

Compare concussion and subluxation

A

Concussion - no displacement, no bleeding, no inc mobility but TTP, no need to splint, subluxation is where there is no displacement, inc mobility, gingival bleeding, ttp and requires 2-4 week flexible splint (2 weeks, 4 weeks, 6-8 weeks, 1 year review period)

40
Q

What is advice for any lunation injuries?

A

Soft diet for a week

OHI, gentle brushing

41
Q

How do we monitor concussion subluxations?

A

Clinical test - trauma sticker
Sensibility testing - at time of injury and at reviews
radiographs - look at root development - width and length of canal, compare with other side, can compare to see if continued growth

42
Q

What is 5 year pulp; survival in concussion? subluxation?

A

open - 100%
closed - 95%

open - 100%
closed - 85%

43
Q

What is 5 year resorption in concussion? subluxation?

A

open - 1%
closed - 3%

open - 1%
closed - 3%

44
Q

What is extrusion?

A

This is an injury to the tooth with partial or total separation of the PDL resulting in loosening and displacement of the tooth

alveolar socket remains in tact

axial displacement and some protrusive or recursive orientation

pdl torn so tooth hangs lower

wide pal space in radiograph- tooth isn’t where it should be

45
Q

What do we see on radiographs for extrusion?

A

We see a wide PDL space as the tooth isn’t where it should be

46
Q

How do we tx an extruded perm tooth?

A

reposition it under LA which has ben given buccal and palatally

flexible splint for 2 weeks

47
Q

How often do we review extrusion injuries?

A

4 weeks, 6-8wks, 6 months, yearly for 5 years

48
Q

What is the 5 year plural survival for extrusion?

A

Open - 95%

closed - 45%

49
Q

What is 5 yr resorption rates for extrusion?

A

open - 5%

closed - 7%

50
Q

What is a lateral lunation injury?

A

This is displacement of tooth other than up or down - its accompanied by communication or fracture of either labial or palatal/lingual bone

pal suffers both tear and crush injuries

51
Q

What happens to PDL in lateral luxation injury?

A

it is CRUSHED AND TORN!!

The pal is torn where tooth moves away and crushed on other side of alveolar plate

52
Q

How do we tx lateral lunation?

A

Reposition under LA admin buccally and palatally

flexible splint for 4 week

53
Q

How often do we review lateral lunation?

A

clinical and radiographic review at 4, 6-8 weeks, 6 months, and yearly for 5 years

54
Q

What is an intrusion injury?

A

This is when tooth is driven into alveolar process due to axially directed impact - most severe displacement injury

crush injury to pal - all pdl crushed into bone as tooth is forced straight up

55
Q

When are intrusion injuries more likely?

A

teeth with fully developed roots

56
Q

What is there a high risk of in intrusion injuries?

A

Resorption - end tx often needed with closed apex teeth - use an interim calcium hydroxide dressing

57
Q

How do we tx intrusion?

A

Radiograph then must identify if open or closed apex and then we decide how severely intruded the tooth is - measure incised edge of undamaged tooth to compare (can draw and put picture in notes for memory)

58
Q

How do we manage an intrusion of up to 7mm in open apex teeth?

A

monitor tooth to see what happens but if more than 7m then rapid ortho or surgical tx

59
Q

When would we monitor for spontaneous eruption in closed apex intruded teeth?

A

up to 3mm, after 3mm-7mm we look at ortho extrusion and more than 7mm we do a surgical

60
Q

If closed apex tooth is intruded 3-7mm what do we do?

A

ortho extrusion

61
Q

If closed apex tooth is intruded more than 7mm what do we do?

A

surgical

62
Q

How does ortho tx of intrusion work?

A

we place ortho bracket on tooth and fix ortho elastic around the arch wire and bracket for traction to extrude

63
Q

How does surgical tx of intrusion work?

A

Take forceps and reposition tooth gently

then apply flexible splint for 4 weeks and begin review process

64
Q

When do we allow spontaneous repositioning to occur?

A

Open apex up to 7mm

closed apex up to 3mm

65
Q

What do we do for spontaneous repositioning?

A

We give pt diet and OH advice

Review monthly to observe re-eruption and ensure progress against fixed point (adjacent tooth) - draw picture

66
Q

When do we use ortho for tx of intrusion?

A

+7mm for open apex or 3-7mm for closed apex

67
Q

When do we use surgical tx for intrusion?

A

> 7mm for open apex or >7mm for closed apex

68
Q

What are the review procedures for intruded teeth?

A

2 weeks, 4 weeks splint removal, 6-8 weeks, 6 months, 1 year then yearly for 5 years

69
Q

What is 5 year pulp survival for intrusion injuries?

A

Open - 40%

closed - 0%

70
Q

What are the 5 year resorption rates for intrusion injuries?

A

Open - 67%

closed -100%

71
Q

What are the follow ups for intrusion?

A

Endo tx wil be needed in closed apex teeth to prevent necrotic pulp from initiating infection related root resorption

72
Q

When should we consider end for intrusion injuries?

A

in all cases with completed root formation where chance of pulp revascularising is low

3. Paediatrics (10 decks)

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