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OMFS > Middle Third fractures > Flashcards

Middle Third fractures Flashcards

1
Q

Guerin Fracture is another name for

A

Lefort 1 also called as
horizontal or telescopic fracture
or Floating Maxilla fracture

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2
Q

Criteria for Glasgow Comma scale

A

Motor response
Verbal performance
eye opening

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3
Q

HALO ON PILLOW or Tramline effect is seen in

A

CSF rhinorrhea - Nasoethmoidal , lefort 2 and 3 fractures

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4
Q

CSF biochemical analysis in case of rhinorrhea is

A

Beta 2 transferrin (also present in perilymph and aqueous humour)

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5
Q

Beta 1 transferrin is seen in

A

Nasal secretions
Tears
Saliva

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6
Q

Management of CSF rhinorrhea

A

Bed rest, head elevation, fluid restriction, avoid nasal blowing, VALSAVA

Mannitol 100 ml IV
Acetazolamide
Antibiotics - Cephalosporins
Spontaneous closure within 1 week

lumbar drainage - next week
surgical - 3rd week

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7
Q

Epiphora seen in

A

Lefort 3

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8
Q

Athens displaced Zygomatic complex can be reduced by

A

Gillies Temporal Approach (GTA)

intraoral approach is Keen’s technique

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9
Q

Lefort 3 involves

A

Maxilla
Lacrimal
Nasal
Ethmoidal bones

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10
Q

Lefort 2 involves

A

Maxilla
Nasal
Lacrimal bones

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11
Q

Rowe’s Disimpaction forceps are used for

A

Reducing the tooth bearing portion of the upper jaw

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12
Q

Bristowe’s Elevator used for

A

elevating Fractured zygomatic bone

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13
Q

Asche’s / Walsham forceps is used for

A

Reduction of nasal complex fractures

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14
Q

For hypovolemic shock post trauma what solution is infused IV?

A

Ringer Lactate due To it’s high osmotic value maintains fluid in vascular compartment.

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15
Q

Hess Chart measures….?

A

The degree of diplopia I. maxillofacial trauma accurately

seen in - Zygomatic complex, lefort 2 And 3 # - passing Whitnells tubercle

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16
Q

Lefort 3 is also called …. when fracture line runs from fronto nasal suture transversely backward parallel with the base involving Ethmoidal bone and cribriform plate

A

Craniofacial Dysjunction

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17
Q

Moon face appearance seen in

A

Lefort 2 and 3

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18
Q

Patient with maxillofacial trauma requires …. mmol of sodium

A

100

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19
Q

Patient with maxillofacial trauma requires …. mmol of potassium

A

60 mmol

20
Q

Gillies approach uses ….. Elevator

A

Bristowe’s Elevator

21
Q

Zygomatic nerve supplies

A

Temple
Cheek
one side of upper lip
and side of 👃

22
Q

Diplopia occura due to injury of

A

Inferior rectus

secondly inferior oblique

23
Q

Ye most accurate diagnostic criteria for blowout fracture of orbital floor consists of

A

2 mm thick section of sagittal CT scans
and
lateral Hyppcycloidal tomograms

24
Q

Treatment of Blowout Fracture of orbital floor should be made within

A

not before 10 days - edema to subside
2-3 weeks of injury
ENOPTHALMOSOUS greater than 3 mm

25
Q

Grafts for orbital floor reconstruction

A

Alloplastic- Teflon , polyvinyl sponge
Allogenic- allogenic bone
Autologous - illiac crest

26
Q

In traumatic telecanthus the intercanthal distance is increased to

A

35-40 mm

27
Q

Fir diagnosis of Nasal Fractures

A

True Lateral and

15 - 30 degrees occipitomental projection

28
Q

Redness in conjunctiva remains bright red due to

A

oxygenation of HB can take place through thin conjunctiva

29
Q

Dautry procedure is used in

A

Chronic Subluxation of TMJ - Zygomatic arch is pushed down infront of Condyle - prevents dislocation to occur

30
Q

Lefort 1 Osteotomy comprises of …. bones

A

5
two maxilla
vomer
pterygoid plates

31
Q

Surgical approach for Frontonasal area is best by

A

Coronal method

32
Q

Bicoronal approach gives best exposure to…. complex

A

Nasoethmoidal complex

33
Q

Tetrapod of zygomatic fracture includes

A

Infraorbital rim - Infraorbital foramen
Lateral Orbital Wall
Zygomaticomaxillary buttress
Zygomatic arch (thin posterior)

34
Q

Latency Phase of fracture healing lasts

A

5-7 days

but patients younger than 4-5 yrs have 0-2 days

35
Q

Three Variables of distraction include

A

Rate
Rhythm
Time

36
Q

Rate of distraction in young children is

A

2mm/day

in adults it’s 1 mm/d

geriatric patients 0.5 mm/d

37
Q

Vascularity of Lefort 1 Osteotomy segment is by

A

Ascending Palatine

ascending pharyngeal of facial artery

38
Q

Elevation of zygomatic arch is confirmed by

A

Audible crunch OR crack sound

39
Q

Exophthalmos is seen in

A

Blow in #
Thyrotoxicosis
Grave’s Disease
Medullary Carcinoma

40
Q

Combitube method of intubation is contraindicated in

A

Patients with innate gag reflex and in rare circumstance of caustic ingestion.
Not used in patients with notable upper airway or neck trauma, since placement is blind and may cause iatrogenic injury

41
Q

Fiber-optic intubating bronchoscope can be used in

A

suspected cervical spine injury

42
Q

Illizarov principal or distraction osteogenesis works on the principle of

A

law of Tension- stress meaning by gradual traction on living tissues created stresses that stimulate regeneration and active growth of certain structures

43
Q

…… nervw injury is most common with transverse fracture of temporal bone

A

Facial nerve

44
Q

In CSF levels of these enzymes indicate injury

A

LDH - Lactate Dehydrogenase

CK- creatinine kinase

45
Q

Most common of facial fractures is

A

Nasal bone fracture

46
Q

Antimongoloid slant is due to

A

downward displacement of zygoma a slant to the lateral canthus, ENOPTHALMOS and accentuation of supra tarsal fold of upper eyelid.
seen in LEFORT 3
Craniofacial dysostosis - Crouzon syndrome
mandibulofacial dysostosis - Teacher Collins Franacetti syndrome

OMFS (5 decks)

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