2022 Flashcards
mechanism of clindamycin
binding to the 50s ribosomal subunit of bacteria. This agent disrupts protein synthesis. Antitoxin
milrinone MOA
vasodilator. inhibits PEAK III cAMP phosphodiesterase isozyme in cardiac and vascular muscle, leading to an increase in intracellular ionised calcium and contractile force in cardiac muscle
ketamine MOA
direct cardiac depressant
NMDA antagonist
also mu opioid
what makes hyaluronic acid in the TMJ
Synovial cells appear somewhat undifferentiated and serve both a phagocytic and a secretory role and
are thought to be the site of production of HA, a glycosaminoglycan found in synovial fluid
tx of desmoplastic fibroma
surgical treatment with a wide free margin resection, followed by reconstruction of the bony defect with a fibular graft
initial fluid bolus resuscitation for peds
20 cc / kg
holdaway ratio– what are teeth in relation to?
chin
Lemierre’s
severe illness caused by the anaerobic bacterium, Fusobacterium necrophorum which typically occurs in healthy young adults. Originates in the throat and spreads via a septic thrombophlebitis of tonsillar vein and internal jugular vein
marginal incision in rhinoplasty goes between which cartilages?
lower lateral cartilage at caudal edge…
eye drop that can fix ptosis
apraclonidine
Webster’s triangle
small triangle of maxillary bone supporting lateral nasal cartilages
bacteria for pericoronitis
step, staph, bacteroides
name of fibers connecting gingiva to tooth and gingiva to implant
circular and periosteogingival fibers
majority of fibers showed a parallel or parallel-oblique orientation to implant neck
edentulous atrophic mandible blood supply
centripetal
major mechanism for tip support in nose
- size, shape and strength of lower lateral cartilages
- attachment of medial crura to caudal septum
- attachment of lower lateral cartilages to upper lateral cartilages
contraindication to BMP
cancer
timing of collagen sponge and BMP
15 minutes
cephalic stripping– how much to leave to avoid alar notching
6 mm
Z plasty 60 degree allows for how much rotation
90 degree change in scar direction
75% in scar length
blood supply to trapezius flap
transverse cervical artery
blood supply to pec flap
Internal mammary artery
blood supply to platysmal flap
Submental branch of facial artery
blood supply to temporalis flap
anterior and posterior deep temporal arteries
blood supply to temporoparietal fascial graft
superficial temporal artery
what to interpose between joint space after TJR to prevent bony growth
fat
what physical exam findings if subcondylar fx and condyle medially displaced
deviation to the ipsilateral side on opening
positive margin on granular cell tumor– observe after or RT?
I think observe but not sure
which sinusitis bacteria is an anaerobe
Peptostreptococcus spp., Fusobacterium spp., and Prevotella and Porphyromonas spp.
mobitz type 1
layer to stay in for coronal flap
?
why use acetone pre-peel
remove oils?
temporal lac that went deep, what nerve injured?
woven bone vs intramembranous bone
what happens when you distract a kid too quickly
when breaking pterygoid plates for lefort, brisk bleed, what is bleeding?
IMA
corticocancellous bone graft properties
cortical bone has higher concentration of BMP, cortical chips incorporated into corticocancellous grafts enhance osteoinductive potential
first step in repairing panfacial fractures
secure airway
not sure if they’re going for top down / outside in .. or expose all the fractures…
worst part of mandible to use avascular bone graft
antibiotic to treat actinomyces
Penicillin G 18-24mil units IV/d x 2-6 wks, then amoxicillin 500-750mg PO three times a day/four times a day x 6-12 mos
(doxycycline or erythromycin as alternatives)
landmark for supraorbital foramen
medial iris or medial pupil?
how to figure out if cant?
measure from medial canthus to canines
can’t fit in space for arthroscopy
didn’t insufflate enough
Kaban classification hemifacial microsomia
I: small joint
IIa: small and abnormal shape relatively normal muscle function
IIb: rotation but no translation, small and abnormal shape, worse muscle function
III: absence of condyle
IV Mandibular body hypoplasia
treatment of Kaban class 3
Iliac or costochondral bone grafts + distraction osteogenesis (later)
Wilkes classification
1: C: Painless clicking with no restrictions in motion. R: ADD with reduction. Normal bone
2: C: occasionally painful clicking, intermittent locking, headaches R: ADD with reduction. Early disc deformity. Normal bone
3: C: frequent pain, joint tenderness, HA, closed lock, painful chewing. R: ADD (early stages reduce, late stages don’t), disc thickening, normal bone
4: C: chronic pain, HA, restricted motion
R: ADD w/o red. Disc thickening. Abnormal bone contours
5: C: crepitus
R: perforated disc, degen changes
what aspect of orbital anatomy is an extension of the periosteum?
septum
what happens if you remove too much fat on an upper bleph?
lagophthalmos
mechanism of bisphosphonates
attach to hydroxyapatite and inhibit osteoclasts
what lab to order before starting carbamazepine
CBC (Plt count and diff, retics), LFTs and renal function, UA, BUN, serum sodium
what lab to order before starting phenytoin
CBC, CMP (Cr and LFTs),
what does wedge pressure represent
left atrial pressure
what is platform switching and why is it done
use smaller abutment than implant. crestal bone loss prevention
