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MDENT110 > Extractions > Flashcards

Extractions Flashcards

1
Q

What are the indications for extractions?

A 
Unrestorable caries
Pulpitis
Periapical disease
Periodontal disease
Trauma
Failed restorative treatment including endodontics
Orthodontics / Restorative dentistry
Teeth involved with pathology
Prophylactically e.g. radiotherapy
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2
Q

What instruments are used for extractions?

A

Forceps

Elevators

Luxators

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3
Q

Whee are forceps applied?

A

to the roots of teeth, apically to dilate the socket

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4
Q

Why are the forceps applied near the fulcrum?

A

To reduce the risk of the fracture

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5
Q

What movement do the forceps carry out on upper anterior teeth and lower premolars?

A

apical then rotation

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6
Q

What movement do the forceps carry out lower anterior teeth?

A

Buccal movement

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7
Q

What movement do the forceps carry out lower molars?

A

Figure of 8 and/or buccally

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8
Q

What movement do the forceps carry out on upper pre-molars?

A

Gentle bucco-palatal movement

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9
Q

What movement do the forceps carry out on upper molars?

A

Buccal movement

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10
Q

What are the principles of use an elevator?

A

Applied to roots
Rotational movement to remove teeth and roots
Not used as a lever
Potentially dangerous

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11
Q

What should you do on completion of the extraction?

A 
Assess contour of socket
Place gauze in the mouth
Remove sharps
Give post op instructions
Confirm haemostasis 
Write notes
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12
Q

What should the post operative advice cover?

A 
Supported by written information leaflet
Should cover;
Bleeding – how to avoid and manage
Pain 
Hygiene 
How to access help if required
Other information as appropriate
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13
Q

What are the post operative instructions for an extraction?

A 
For the 1st day avoid:	
Mouth rinsing
Hot food or drink 
Alcohol
Smoking 
Strenuous activity
If bleeding develops, bite on a clean handkerchief or cloth for 10 minutes
Take simple analgesics as required

From the 2nd day:
Use hot salt mouthwashes – after meals until socket(s) healed over

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14
Q

What do you check for a new patient needing an extraction?

A

Introduce yourself
Check you have the correct patient
Check the notes to see what patient has been referred for – confirm with patient
Which tooth / teeth to be removed and why
Are they medically fit for treatment
Review radiograph if one is available

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15
Q

What structures do you assess pre-operatively?

A

Crown
Root
nerves
surrounding bone

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16
Q

in what 3 stages can complications occur?

A

before - MH, anatomy
during - fracture of bone/tooth, bleeding
after - pain swelling bleeding dry socket etc

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17
Q

What are common complications of extractions?

A 
Failure to complete  extraction
Fracture of tooth
Pain
Swelling
Trismus
bleeding 
infected sockets

Antral complications:
OAC (oro-antral communication)
Root or tooth in sinus
Fractured tuberosity

Post-op infections

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18
Q

How may you anticipate the failure to complete extraction or a tooth fracture?

A 
Previous history
Age, size of patient 
Root filled teeth
Bruxism
Heavily restored / carious / broken down teeth
Abnormal anatomy, ankylosis
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19
Q

How can you possibly prevent or warn of a failed extraction?

A

Don’t start unless you can complete or have contingency plan
Warn patient
Make referral to colleague

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20
Q

What is the management for a failed extraction?

A

Palliate
-dressing / extirpation / (antibiotics?)

Proceed immediately to surgical removal or complete later
Refer

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21
Q

What is the trans-alveolar approach?

A 
Raise a muco-periosteal flap
Remove bone
Section roots
Elevate roots
Close flap with sutures
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22
Q

How can you minimise pain and swelling?

A

Careful extraction technique
NSAIDs
Post-op advice

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23
Q

What analgesics and doses might be recommended after extraction?

A

Paracetamol 500mg – 1g 6 hourly - (max 8 per day)
Co-codamol 500/8mg – as above
Co-codamol 500/30mg – as above

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24
Q

What NSAIDs and doses might be recommended after extraction?

A 
Aspirin 		
300 – 900mg 6 hourly
Ibuprofen		
200 – 400mg 8 hourly
Diclofenac		
25 - 50mg 8 hourly (POM)
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25
Q

What patients have to be cautious of NSAIDS?

A

Use with caution in the elderly, patients with known allergy, (asthma), bleeding problems, kidney disease and gastric problems

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26
Q

What can cause trismus?

A 
Inflammatory swelling and pain
Haematoma
Abscess
Cellulitis:
Trauma
Cancer
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27
Q

What is trismus?

A

Limitation of mouth opening

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28
Q

What are the signs and symptoms of infection after extraction?

A 
Pain and swelling 
Trismus +/-
Difficulty swallowing
Lymphadenopathy
Pyrexia - raised body temp
Tenderness
Tense tissues or fluctuation if abscess formation
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29
Q

How can you anticipate and prevent an infection?

A 
Pre-existing infection
Chlorhexidine mouthwash pre-op
Wound care
Antibiotics if:
infection present?
patient is compromised 
post-op infection likely or potentially serious
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30
Q

What is the treatment for an infection?

A

Treatment
Drain abscess
Antibiotics

Bone infections
Antibiotics , debridement

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31
Q

What patients have an increased risk of bleeding with extraction?

A

Clotting disorders / anticoagulants

Platelet disorders / antiplatelet drugs

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32
Q

What is the management for a patient with bleeding issues in an extraction?

A

Pre-op precautions e.g. INR
Apply pressure
Suture across socket
Haemostatic dressing in socket

33
Q

What is alveolar osteitis?

A

Dry socket

34
Q

Who and what is dry socket more likely in?

A

Smokers

lower extractions

Patients on oral contraceptives

35
Q

When does dry socket develop?

A

Typically a few days post op

36
Q

What is the management of a dry socket?

A 
Patient education -post op instructions
avoid smoking for 4 days after 
BIPP (historical)
Platelet rich fibrin ( no evidence)
pre-emptive alvogyl 
Therapeutic: 
Irrigate socket
Dress socket (alvoygl)
give advice on analgesics 
can also:
- analgesia 
- smoking cessation 
- gentle mouth bathing
37
Q

When may antral complications arise?

A

May occur following removal of upper posterior teeth

More likely in lone standing teeth and where the maxillary antrum is large

38
Q

What antral complications can arise?

A

Oro – antral communication

Fistula formation

Root or tooth into sinus

39
Q

What may suggest that there might be an antral complication?

A

Anatomical features

Age

40
Q

What are the symptoms of an oro-antral communication?

A

patient complains of:
Fluid in nose
Unable to achieve an oral seal
Air passing into mouth

41
Q

What are the signs of an oro-antral communication?

A 
Bone extracted with tooth  (egg shell)
Large void into sinus
Antral lining visible via socket
Bubbles in socket
Prolapsed antral lining
42
Q

How do you manage an oro-antral communication?

A

Assess degree of damage
Buccal advancement flap or leave open
Give appropriate POI

Antibiotics
Amoxicillin
Decongestants (e.g. ephedrine nasal drops)
Review

43
Q

What instructions are given to a patient with an oro-antral communication?

A

The usual instructions following surgery PLUS
Inform patient
No nose blowing
Sneeze with the mouth open
Do not blow up balloons or play wind instruments

44
Q

What do you do if there is a root or tooth in the sinus?

A

May be able to retrieve with a small sucker or instrument if stuck under lining
Give antibiotics and refer
Surgeon can retrieve via Caldwell-Luc incision or endoscopy

45
Q

Where is it more likely to get a fractured tuberosity?

A

lone standing upper molars where the antrum is large

46
Q

What are the signs of a fractured tuberosity?

A

Tearing of palatal mucosa

Mobility of adjacent teeth and alveolus

47
Q

How do you manage a fractured tuberosity?

A

Replace and splint
Suture tears
Palliation, soft diet
Refer,

or
Remove tooth surgically a few weeks later
Raise flap and remove at the time

48
Q

What is the immediate reaction in a socket to an extraction?

A

Blood clot, white cells, vasodilation - inflammatory response but allows healing

49
Q

What happens in the 1st, 2nd and 4th week of socket healing?

A

1

50
Q

What are the symptoms of dry ocket?

A 
Pain
foul taste and smell
localised inflammation and tenderness
partial or total loss of blood clot
resistant to analgesics
51
Q

What is septic socket?

A

Inflammation of the socket - involving cortical bone only (outer surface)

52
Q

What is osteomyelitis?

A

Infection involving cancellous bone

53
Q

What is osteonecrosis?

A

Death of portion of jaw bone

54
Q

What are the causes of dry socket?

A

failure of clot to form - poor blood supply, smoking, sclerotic bone
clot degradation - fibrinolysis as a result of oestrogens, trauma - traumatic extraction, bacterial pyrogens (clot may be absorbed too early)
clot loss - excessive mouth washing - don’t rinse for first 24 hours
bacterial colonisation - further breakdown of clot

55
Q

What is the incidence of a dry socket on average and in lower wisdom teeth?

A

0.5-5% average risk

up to 25% for lower wisdom tooth

56
Q

What are the risk factors for dry socket?

A

patient factors

  • female - oestrogen can affect the lot degradation
  • OCP and menstruation
  • smoker
  • failure to comply with post-op instructions
  • age - older people at more risk
  • poor healing

technical factors

  • posterior
  • mandible
  • pre-existing infection/pericoronotis (infection around wisdom tooth)
  • traumatic extraction
  • experience of surgeon
  • inappropriate irrigation - over irrigation can reduce clotting
  • LA load (vasoconstrictor) - too much restricts blood supply with reduces clotting
57
Q

What are the risk factors for poor healing?

A 
smoking
steroid therapy
immunosuppression med
poorly controlled diabetes
bone pathology
poor hygiene
previous radiotherapy
58
Q

What three things are in Alvogyl?

A

butamben (LA)
iodoform (antiseptic)
eugenol (analgesic)

59
Q

What are the symptoms of septic socket and how would you manage it?

A

Swelling
lymphadenopathy
fromation of pus - only in the socket

Manage as dry socket with or without antibiotics (metronidazole or pencilin based) + alvogyl

60
Q

How can you prevent septic socket?

A

not always possible
careful POI
antiobitics for compromised patients
consider antiobiotics if surgial site is infected at time of surgery especially wisdom

61
Q

What investigations would you do with delayed healing and what treatment?

A

x ray - delayed healing cna cause a granulation tissue response in the roots
consider other diagnoses - SCC

curettage - removal of tissue and dressing

62
Q

What are the symptoms of osteomyelitis?

A

pain
altered sensation
pus, sinus formation
may progress to involve nerves

63
Q

How is osteomyelitis treated?

A

Antibiotics
debridement
refer to OMFS

64
Q

When does acute and chronic myelitis occur?

A

acute - 4 weeks

chronic - there after

65
Q

What would you see histologically osteomyelitis?

A

Leukocyte infiltration in amrrow space
scalloping of bone
loss of osteocytes from lacunae
necrotic bone

66
Q

What is osteoradionecrosis?

A

Bone has died off related to radiotherapy of the jaws
must have had previous radiotherapy to this area
mandible greater than maxilla
65 grays is threshold between low and high risk
reduced incidence over the last few decades - computer aided tech has localised the area more

67
Q

What is MRONJ?

A

medication related osteonecrosis of the jaws
BRONJ - bisphosphante related - common cause of osteonecrosis

common in exams 
ADA criteria:
exposed bone > 8 weeks
no history of RT
patient is on drug linked to MRONJ 
about 70% preceded by invasive dental surgery 
only occurs in the craniofacial skeleton
68
Q

How is osteoradionecrosis managed?

A

prevention better than cure
remove teeth of doubtful prognosis prior to radiotherapy
good oral health and prevention with fluoride
need antiobitoics and careful surgery
management depends on severtiy
hyperbaric oxygen(high dose), antibiotics if infected, debridement

69
Q

What are the drugs causing MRONJ?

A

Bisphosphonates
monocloncal antibodies e.g. denosumab
tyrosine kinase inhibitors e.g. sunitinib

70
Q

Give some examples of bisphosphonate?

A 
risedronate
alendronate
etidronate
pamidronate - IV greater risk 
zoledronate  -IV greater risk
71
Q

Why are bisphonates used?

A

reduction in bone turnover through effects on osteoclast

beeneficial in osteoporosis, Pagets disease, Metastasis (common breast cancer)

72
Q

What is the structure of a bisphosphonate?

A

2 x phosphonate groups (Po3)
linked by central carbon
2 x side chains (R groups) - exposed to bone surface, OC contacts this first
reduces SA of osteoclast, fewer chemicals released so reduces bone turnover

73
Q

What are the 2 main clinical scenarios where people are on bisphosphonate?

A

Breast cancer - high dose, IV bisphosphonates, 10% risk of BRONJ over a 3 year course

osteoporosis - low dose, oral
1/100000 per year
1/1000 following extraction

74
Q

Why does MRONJ occur/

A

anti-angiogenesis
direct toxicity to cells with bone
toxicity to overlying soft tissues

75
Q

Name three medications that may predispose to dry socket?

A 
steroids, cyclosporins
cop
methotrexate 
bisphosphonates
vasoconstritor in lA
76
Q

Give 4 other factors that may predispose to dry socket that are not medications

A 
Oral hygiene
smoking
site of tooth extraction
excessive mouth rinsing
hsitor of traumatic extraction
77
Q

Give three treatments you could offer this patient to improve their symptoms

A 
irrigate socket with chlorhex, normal saline
alvogyl dressing
analgesia
repeat post op instructions
advise no further smoking
78
Q

What would be your differential diagnoses and how would you rule them out ? (for dry socket)

A

Septic socket - no visble pus
Delayed healing - take an x ray
Mronj
osteoradionecrosis of jaw

MDENT110 (26 decks)

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