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MODULE 6 > OS - tutorial 3 > Flashcards

OS - tutorial 3 Flashcards

1
Q

what does a sinus imply about the duration of infection?

A

chronic infection

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2
Q

a sinus is placed buccally, what does this tell you about the anatomy of the buccal roots of tooth 26?

A

short roots, close to buccal cortex

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3
Q

why wont antibiotics help a root treated tooth showing signs of infection (sinus)?

A

bacteria in the tooth itself
tooth no longer has vascular supply
antibiotics are systemic so wont reach it

antibiotics only kill bacteria that have infiltrated tissues (acute)

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4
Q

what forceps would you use for xla tooth 26?

A

upper left molar

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5
Q

how can you achieve anaesthesia if a lidocaine infiltration fails?

A

intraligamentary, intraosseous, intrapulpal
or
articaine

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6
Q

list compications of xla of upper molars?

A

OAC
crown fracture
root fracture
alveolar fracture
laceration of soft tissues
damage to adjacent teeth
displacement in to antrum

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7
Q

if a crown fractures off during xla, what determines it becoming surgical?

A

if tooth is below bone level
shape of roots - bulbous, convergent, divergent, very long

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8
Q

what flap design would be most suitable for tooth 26? and why?

A

3 sided
reduces complication of OAC as you can use flap to close

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9
Q

once a flap has been raised, where do you remove bone to remove a tooth?

A

remove bone for a point of application
always take buccal roots out first

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10
Q

what factors determine whether you need to section the furcation during SR of a tooth?

A

convergent, divergent, bulbous roots

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11
Q

when extracting tooth 26, the palatal root is pushed up in to antrum. how do you investigate this?

A

PA
if doesnt show, DPT

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12
Q

Why would you give antibiotics for OAC creation?

A

introduced contaminated tooth in to a sterile area - risk of sinusitis

high risk - whole root
low risk - apical third of root

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13
Q

if OAC not managed, what may happen?

A

it will either close spontaneously
or
epithelialise and cause oral antral fistula (permanent communication) = chronic sinusitis

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14
Q

what is the surgical treatment for OAC?

A

buccal advancement flap - excise periosteum to allow mucosa to stretch across

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15
Q

what does a temperature above 37.8 degrees imply?

A

pyrexia

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16
Q

how do you investigate pericoronitis?

A

half/ full DPT

17
Q

what are the local management measures for pericoronitis?

A

irrigation with saline
assess possible traumatic aspects e.g., upper 8 may need grinded down

18
Q

what antibiotics can be given for pericoronitis showing with systemic effects like trismus and pyrexia?

A

metronidazole 400mg 3xday for 5 days

19
Q

what must be avoided when taking metronidazole?

A

drinking alcohol

20
Q

what are the angles of impaction seen with 8s?

A

transverse - lingual or buccal positioned
aberrant - upside down
horizontal
vertical
mesioangular
distoangular

21
Q

what order do you plan surgery for third molars?

A
  1. path of eruption
  2. extrinsic/ intrinsic obstacles
  3. required bone removal
  4. point of application
  5. flap design
22
Q

what flap design is most often used for third molars?

A

3 sided flap (triangular)

23
Q

what are the general principles of flap design?

A

flap wound should rest on bone
fewer sutures placed the better

24
Q

how do you carry out bone removal?

A

bur in a surgical handpiece

25
Q

when would you need to section teeth?

A

horizontally impacted teeth
distoangular impacted teeth

roots with different paths of removal

26
Q

why do you use saline irrigation when drilling bone?

A

bur gets hot

27
Q

what suture material is used to close the wound and where do you place sutures?

A

3/0 vicryl rapide
suture placed from buccal tissues to lingual tissues immediately distal to 7

28
Q

how do you check for an OAC?

A

CBCT

29
Q

What flap design would you use to close an OAC?

A

buccal advancement flap

30
Q

What antibiotics can you prescribe for OAC?

A

penicillin

31
Q

what analgesic would you recommend for OAC?

A

ephedrine drops
mucolytic inhalers

32
Q

How can you reduce patients risk of MRONJ?

A

ensure you dont strip the periosteum during elevation as it has blood supply for healing

33
Q

when would you review an MRONJ risk patient?

A

8 weeks after xla
until socket heals

34
Q

what is the significance of prednisilone and MRONJ?

A

causes damage to the bones

35
Q

what warnings would you give to pts before completing SR on the mandible?

A

numbness of lower lip due to post op swelling

36
Q

what disorder is associated with supernumerary teeth?

A

cleidocranial dysostosis

37
Q

what flap design would you use for removing teeth in the lingual area?

A

envelope

MODULE 6 (69 decks)

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