DEX IOT DAY ACTUAL EXAM COMPLETE QUESTIONS AND
CORRECT VERIFIED ANSWERS (DETAILED ANSWERS)|ALREADY
GRADED A+
syndesmosis joint
ANSWER IS - also known as tibiofiibular ligament,
located above the ankle joint, comprised of:
AITFL: anterior inferior talo-fibular ligament
PITFL: strongest ligament
Tibiofibular Interosseous ligament: membrane running vertically between fibula and tibia
talus anchor in atfl
ANSWER IS - 2cm from lateral talar process angled 40-45 degrees to the sagittal plane and parallel with
the longitudinal line of fibula, 4:30 for R, 7:30 for L
fibula anchor in atfl
ANSWER IS - 15mm from distal tip of fibula
tensioning atfl ib
ANSWER IS - neutral with 10-15 degrees plantar flexion
medial mal anchor for deltoid ib
ANSWER IS - medial mal in intercollicular grove w/ 4.75 anchor
talus anchor in deltoid ib
ANSWER IS - deep deltoid, 12.2mm/1cm in talus
sustentaculum tali anchor for deltoid ib
ANSWER IS - superficial deltoid, 8mm anterior
deltoid recon
ANSWER IS - superficial tibiocalcaneal & deep posterior tibiotalar
ANSWER IS - forced external rotation of the foot (specifically talus)
syndesmosis function
ANSWER IS - resists movement of:
coronal translation (side to side/left to right)
rotational
sagital translation (forward or backwards)
ideally syndesmosis resists diastesis but allows normal physiological micro-motion
Aitfl mechanism of injyry
, ESTUDY
ANSWER IS - external rotation -> force of the talus pushing on fibula causes tear/stress
when to use aitfl internal brace
ANSWER IS - Re-assess syndesmotic motion. mild rotational instability
Weber Classifications
ANSWER IS - based on level of fibula fracture compared to ankle/syndesmosis joint & better for
surgical decision making
Weber A
ANSWER IS - below ankle joint (infrasyndesmotic)
Avulsion type injury of distal fibula Foot supinated (inversion) with an adduction deforming force
Stress on atfl & cfl causes bone to break off (similar to medial mal) Usually doesn't involve syndesmotic
injury
medial mal is also often fractured
Weber B
ANSWER IS - at the ankle joint (transyndesmotic)
could include syndesmosis injury
most common
medial mal may be fractured or deltoid ligament may be torn
variable stability
foot inverted with external rotation
Weber C
ANSWER IS - above the ankle joint (suprasyndesmotic)
most likely a syndesmosis injury
distal tibiofibular articulation widened
foot in pronation (eversion), the medial structures are under tension and external rotation force is
applied
almost always syndesmosis
deltoid injury and/or medial mal fracture
Lauge hansen
ANSWER IS - describes position of foot at time of injury & deforming forces
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Estudyr. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $14.99. You're not tied to anything after your purchase.
