OMSITE REVIEW TIPS QUESTIONS AND ANSWERS
SET A+
✔✔What is the difference between decorticate and decerebrate posturing? -
✔✔Decorticate flexes hands and feet toward body
Decerebrate extends away.
Think E for extend.
✔✔Patient involved in trauma has high serum Osm and low urine Osm. What condition
are they suffering from? - ✔✔Central (Neurogenic) Diabetes Insipidus
✔✔What is the MOA of Thiazolidinediones? - ✔✔PPAR activator, sensitize adipocytes
to insulin
✔✔What is the MOA of Biguanides? - ✔✔Decrease gluconeogenesis, increase insulin
sensitivity, decrease glucose
absorption
✔✔What is the MOA of Sulfonylureas? - ✔✔Increase insulin release by directly
stimulating release from pancreatic B-Cells?
✔✔What artery and vein are reanastomosed in free fibula flap? - ✔✔Peroneal artery
and vena comitans (provide blood supply to flap) with facial artery and vein
✔✔What areas of the hand can be affected from RFFF without prior Allen's test? -
✔✔Thumb and forefinger
✔✔Dopamine is given to a patient with what condition? - ✔✔Euvolemic hypotension
✔✔At what tooth position is the IAN closest buccally? - ✔✔3rd molar
,✔✔Who is most likely to get Angioedema from ACE inhibitor? - ✔✔Black people
✔✔What class of drugs has a negative impact on lipid and glucose metabolism? -
✔✔Beta blockers
✔✔How do you avoid bat wing deformity following facelift? - ✔✔Platysmal plication
✔✔ATLS is designed to manage patients in: - ✔✔Second peak of death
✔✔What is the mechanism of botox? - ✔✔Impedes Ach release from presynaptic
neuron at neuromuscular plate/junction
✔✔REM sleep compromises what percentage of total sleep? - ✔✔25%
✔✔What reason would you perform early secondary alveolar cleft grafting? - ✔✔If
ectopic eruption is occurring
✔✔What is the treatment for avulsion of tooth with open apex? - ✔✔Reimplantation and
observe
✔✔What is the ideal Zygomatic implant position from lateral canthus? - ✔✔2cm inferior,
1.5-2cm lateral (listed twice on OMSITE)
1.5-2cm inferior, 1cm lateral (listed once on OMSITE)
Just know more inferior than lateral. All values between 1 and 2
✔✔Describe synovial A and B cells - ✔✔A are like mAcrophages and B are like
fiBroBlasts
✔✔What type of cartilage for TMJ disc? - ✔✔Fibrocartilage (which consists of 85% type
I and 115% II collagen)
✔✔What structure arises from Meckel's cartilage? - ✔✔Sphenomandibular ligament
✔✔During arthroscopy what prevents access to the joint with endoscope? - ✔✔Not
enough fluid injected to distend joint space
✔✔Z pasty with 60 degree angle gives how much rotation? - ✔✔90 degree
✔✔Why use desflurane? - ✔✔Quick on and off due to low blood gas partition coefficient
Also notes fast return of cognitive functions which I take as quick wake up
,✔✔What is the mechanism by which servo causes hepatic damage? - ✔✔Antigenic
response
Tetrafluoro binds to hepatic proteins
Antigenic response = trifluoroacetylated reactive intermediate (TFA)
✔✔Why is EPTFE non degradable?
What is another name for sutures of this material? - ✔✔Body has no enzyme to break
down C-F bond.
Goretex
✔✔Patient with crown restored onto implant 5 months prior. Develops recession and
pain (maybe
minor exudate) with exposed threads. Xray looked with bone loss. What to do? -
✔✔Remove implant then wait to regraft bone and soft tissue
✔✔When placing Alloderm what is the orientation? (Smooth surface BM likes the blood,
rough
surface BM likes blood, smooth surface dermal likes blood, rough surface dermal likes
blood) - ✔✔Smooth surface is the dermal side, becomes red, likes blood, faces tissue
(vascular)
Rough surface is basement membrane, repels blood, remains white, placed toward root
surface (avascular)
✔✔What is the point of putting soft tissue graft at time of implant sx? - ✔✔Add buccal
gingival thickness
✔✔What is a risk of flapless implant placement? - ✔✔Increased apical fenestration
✔✔What is the difference between TADs and implants? - ✔✔For TADs time of loading
(healing time) is faster and amount of loading is less
✔✔Which BMP is bad? Why? - ✔✔BMP 3.
Decreases bone production and osteoblast activity?
✔✔When using BMP with collagen carrier, what is the most important step? - ✔✔Soak
for 15 minutes
✔✔With immediate loading of implants in edentulous mandible what do you need to be
, successful? - ✔✔Use acrylic prothesis to splint implants
✔✔What is the definitive way to differentiate ossifying fibroma from fibrous density? -
✔✔Some shit about fibroblasts/ osteoblast lineage
✔✔Impacted tooth with radiolucent/radiopaque lesion, 13F? - ✔✔AOT vs COC
Its going to come down to where exactly, and how much calcification. 1/3 COC
associated with impacted tooth and usually anterior jaw. 2/3 for AOT. Numbers game.
✔✔What is the difference of full thickness from split thickness skin graft? - ✔✔Overall
less contracture.
Full thickness has more primary contracture, less secondary contracture and easier
post operative wound care.
✔✔Percentage of patients over 40 years that have radiographic evidence of OA. -
✔✔40%
✔✔CT recon with L subcondylar fracture - ✔✔Only option that appears correct is L V3
paresthesia
Other options are L open bite, reduced L: excursion, deviation to the R on opening
✔✔Rhabdomyosarcoma in head and neck are of what origin? - ✔✔Embryonal (most
common)
✔✔Most common type of Osteosarcoma in the jaw?
Most common osteosarcoma of long bones? - ✔✔Chondroblastic - jaw
Osteoblastic - long
✔✔Most common salivary gland tumor with multifocal origin? - ✔✔Papillary
cystadenoma lymphomatosum
✔✔Most common salivary gland tumor with perineurial invasion?
Most common salivary gland tumor with perineurial spread? - ✔✔Polymorphous low
grade adenocarcinoma
(per 2009 OMSITE)
Adenoid cystic
SET A+
✔✔What is the difference between decorticate and decerebrate posturing? -
✔✔Decorticate flexes hands and feet toward body
Decerebrate extends away.
Think E for extend.
✔✔Patient involved in trauma has high serum Osm and low urine Osm. What condition
are they suffering from? - ✔✔Central (Neurogenic) Diabetes Insipidus
✔✔What is the MOA of Thiazolidinediones? - ✔✔PPAR activator, sensitize adipocytes
to insulin
✔✔What is the MOA of Biguanides? - ✔✔Decrease gluconeogenesis, increase insulin
sensitivity, decrease glucose
absorption
✔✔What is the MOA of Sulfonylureas? - ✔✔Increase insulin release by directly
stimulating release from pancreatic B-Cells?
✔✔What artery and vein are reanastomosed in free fibula flap? - ✔✔Peroneal artery
and vena comitans (provide blood supply to flap) with facial artery and vein
✔✔What areas of the hand can be affected from RFFF without prior Allen's test? -
✔✔Thumb and forefinger
✔✔Dopamine is given to a patient with what condition? - ✔✔Euvolemic hypotension
✔✔At what tooth position is the IAN closest buccally? - ✔✔3rd molar
,✔✔Who is most likely to get Angioedema from ACE inhibitor? - ✔✔Black people
✔✔What class of drugs has a negative impact on lipid and glucose metabolism? -
✔✔Beta blockers
✔✔How do you avoid bat wing deformity following facelift? - ✔✔Platysmal plication
✔✔ATLS is designed to manage patients in: - ✔✔Second peak of death
✔✔What is the mechanism of botox? - ✔✔Impedes Ach release from presynaptic
neuron at neuromuscular plate/junction
✔✔REM sleep compromises what percentage of total sleep? - ✔✔25%
✔✔What reason would you perform early secondary alveolar cleft grafting? - ✔✔If
ectopic eruption is occurring
✔✔What is the treatment for avulsion of tooth with open apex? - ✔✔Reimplantation and
observe
✔✔What is the ideal Zygomatic implant position from lateral canthus? - ✔✔2cm inferior,
1.5-2cm lateral (listed twice on OMSITE)
1.5-2cm inferior, 1cm lateral (listed once on OMSITE)
Just know more inferior than lateral. All values between 1 and 2
✔✔Describe synovial A and B cells - ✔✔A are like mAcrophages and B are like
fiBroBlasts
✔✔What type of cartilage for TMJ disc? - ✔✔Fibrocartilage (which consists of 85% type
I and 115% II collagen)
✔✔What structure arises from Meckel's cartilage? - ✔✔Sphenomandibular ligament
✔✔During arthroscopy what prevents access to the joint with endoscope? - ✔✔Not
enough fluid injected to distend joint space
✔✔Z pasty with 60 degree angle gives how much rotation? - ✔✔90 degree
✔✔Why use desflurane? - ✔✔Quick on and off due to low blood gas partition coefficient
Also notes fast return of cognitive functions which I take as quick wake up
,✔✔What is the mechanism by which servo causes hepatic damage? - ✔✔Antigenic
response
Tetrafluoro binds to hepatic proteins
Antigenic response = trifluoroacetylated reactive intermediate (TFA)
✔✔Why is EPTFE non degradable?
What is another name for sutures of this material? - ✔✔Body has no enzyme to break
down C-F bond.
Goretex
✔✔Patient with crown restored onto implant 5 months prior. Develops recession and
pain (maybe
minor exudate) with exposed threads. Xray looked with bone loss. What to do? -
✔✔Remove implant then wait to regraft bone and soft tissue
✔✔When placing Alloderm what is the orientation? (Smooth surface BM likes the blood,
rough
surface BM likes blood, smooth surface dermal likes blood, rough surface dermal likes
blood) - ✔✔Smooth surface is the dermal side, becomes red, likes blood, faces tissue
(vascular)
Rough surface is basement membrane, repels blood, remains white, placed toward root
surface (avascular)
✔✔What is the point of putting soft tissue graft at time of implant sx? - ✔✔Add buccal
gingival thickness
✔✔What is a risk of flapless implant placement? - ✔✔Increased apical fenestration
✔✔What is the difference between TADs and implants? - ✔✔For TADs time of loading
(healing time) is faster and amount of loading is less
✔✔Which BMP is bad? Why? - ✔✔BMP 3.
Decreases bone production and osteoblast activity?
✔✔When using BMP with collagen carrier, what is the most important step? - ✔✔Soak
for 15 minutes
✔✔With immediate loading of implants in edentulous mandible what do you need to be
, successful? - ✔✔Use acrylic prothesis to splint implants
✔✔What is the definitive way to differentiate ossifying fibroma from fibrous density? -
✔✔Some shit about fibroblasts/ osteoblast lineage
✔✔Impacted tooth with radiolucent/radiopaque lesion, 13F? - ✔✔AOT vs COC
Its going to come down to where exactly, and how much calcification. 1/3 COC
associated with impacted tooth and usually anterior jaw. 2/3 for AOT. Numbers game.
✔✔What is the difference of full thickness from split thickness skin graft? - ✔✔Overall
less contracture.
Full thickness has more primary contracture, less secondary contracture and easier
post operative wound care.
✔✔Percentage of patients over 40 years that have radiographic evidence of OA. -
✔✔40%
✔✔CT recon with L subcondylar fracture - ✔✔Only option that appears correct is L V3
paresthesia
Other options are L open bite, reduced L: excursion, deviation to the R on opening
✔✔Rhabdomyosarcoma in head and neck are of what origin? - ✔✔Embryonal (most
common)
✔✔Most common type of Osteosarcoma in the jaw?
Most common osteosarcoma of long bones? - ✔✔Chondroblastic - jaw
Osteoblastic - long
✔✔Most common salivary gland tumor with multifocal origin? - ✔✔Papillary
cystadenoma lymphomatosum
✔✔Most common salivary gland tumor with perineurial invasion?
Most common salivary gland tumor with perineurial spread? - ✔✔Polymorphous low
grade adenocarcinoma
(per 2009 OMSITE)
Adenoid cystic
