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4th yr- CCD2- Trauma Symposium > Luxation and Avulsion Injuries > Flashcards

Luxation and Avulsion Injuries Flashcards

1
Q

Describe a luxation injury

A

An injury that causes damage to the periodontal ligament

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2
Q

List the different classifications fro a luxation injury

A
  1. Concussion
  2. Subluxation
  3. Extrusion
  4. Lateral Luxation
  5. Intrusion
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3
Q

What is a concussion injury

A

Haemorrhage and Oedema in Periodontal Structure

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4
Q

Describe the periodontal ligament fibres in a concussion injury

A

They are intact

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5
Q

Describe how a concussion tooth presents clinically

A
  1. Very tender
  2. Not dispalced
  3. Not mobile
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6
Q

What is a subluxation injury

A

Gingival haemorrhage

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7
Q

Describe the periodontal ligament fibres in a subluxation injury

A

Are torn

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8
Q

Describe how a subluxation tooth presents clinically

A
  1. Mobility

2. No displacement

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9
Q

How do we manage a concussion and subluxation injury

A

Soft diet

possible splint if mobile but not common

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10
Q

What is an extrusion injury

A

Occlusion displacement of tooth along vertical axis

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11
Q

Describe the periodontal ligament fibres in a extrusion injury

A

Rupture of periodontal fibres and Neurovascular bundle

Periodontal ligament torn

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12
Q

Describe how an extrusion injury presents clinically

A
  1. Clinically elongated
  2. mobile
  3. Gingival Haemorrhage
  4. Occlusal Interference
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13
Q

What is a lateral luxation injury

A

Simultaneous rupee and compression of periodontal ligament with fracture to the alveolar socket

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14
Q

Describe how a lateral luxation injuty presents clinically

A
  1. Usually crown is displaced labially
  2. may be mobile
  3. Gingival haemorrhage
  4. May be occlusal interference
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15
Q

How do we treat extrusion of lateral luxation injury

A
  1. Reposition tooth
  2. Physiological Splint for 3-4 weeks
  3. Antibiotics, chlorhexidine
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16
Q

What is an intrusion injury

A

Tooth displaced vertically upwards

17
Q

Describe the PDL in an intrusion injury

A
  1. Extensive Crushing of Periodontal Structures
  2. Disruption of Neurovascular Bundle
  3. Significant number become necrotic
18
Q

How do we manage intrusion injuries

A
  1. Leave it and it may spontaneously erupt
  2. Orthodontically extrude
  3. Surgically extrude
19
Q

What factors do we need to consider before deciding a treatment option for intrusion injuries

A
  1. Open or closed apex
  2. Patients age
  3. Intrusion severity
  4. Eruptive potential
  5. Likelihood to become non vital
20
Q

List the situation in which you would leave an intrusion injury

A
  1. Open apex with less than 7mm intrusion severity

2. Closed apex up to 3mm intrusion severity

21
Q

List the situation in which you would orthodontically reposition an intrusion injury

A
  1. Open apex with more than 7mm intrusion severity

2. Closed apex 3-7mm intrusion severity

22
Q

List the situation in which yo would surgically reposition an intrusion injury

A
  1. Open apex with more than 7mm intrusion severity

2. Closed apex more than 7mm intrusion severity

23
Q

What does the prognosis of an avulsion injury depend on

A
  1. Extra oral time

2. Extra oral storage medium

24
Q

List some extra oral storage medium that can improve prognosis

A
  1. Normal saline

2. Milk

25
When is unfavourable healing guaranteed
1. Extra oral time more than 60 mins in a medium | 2. Dry extra oral time more than 30 mins
26
What happens to the PDL when a tooth is avulsed
PDL dies
27
What effect does PDL death have on the tooth
1. Bone is now in direct contact with tooth | 2. Ankylosis (infra occlusion) and Replacement Resorption
28
What are the disadvantages of not reimplanting
1. Infraocclusion 2. Gingival contour 3. Multiple Visits 4. Tooth will be lost
29
What are the advantages of reimplanting
1. Aesthetics 2. Space Maintenance 3. Maintain options (bone preservation, transplants) 4. Prevent restorative treatment
30
How do we reimplant
1. LA 2. Irrigate socket 3. Hold tooth by crown only 4. Gently reposition 5. Ask patient to bite on cotton wool roll 6. Placem flexible splint
31
What is the survival rate of a pulp following avulsion of an open apex
30%

4th yr- CCD2- Trauma Symposium (7 decks)

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