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DEX IOT Exam with All Complete Solutions Graded A+
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DEX IOT Exam with All Complete Solutions Graded A+ PARS system advantages - Answer-reserves blood supply, percutaneous locking stitch, less risk of injury or entrapment of sural nerve bc it is placed in the paratenon where the nerve isnt, suture coarse adjacent to achilles suture tape benefits ...

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  • September 7, 2024
  • 17
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • dex iot
  • dex iot exam
  • pars system advantages
  • dex iot exam with all complete solutions graded a

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DEX IOT Exam with All Complete
Solutions Graded A+

PARS system advantages - Answer-reserves blood supply, percutaneous locking stitch,
less risk of injury or entrapment of sural nerve bc it is placed in the paratenon where the
nerve isnt, suture coarse adjacent to achilles

suture tape benefits compared to #2 fiberwire - Answer-■ Feels flat out better than
round suture ■ Increased resistance to tissue pull-through1 ■ Stronger knotted and
knotless fixation1 ■ Tighter, smaller knot stacks ■ Better handling characteristics

lateral ankle complex - Answer-also known as talofibular joint, located below ankle joint,
consists of ATFL, CFL, and PTFL

lateral ankle instability - Answer-functional instability: subjective complaint of patient
mechanical instability: clinical and radiographic evidence that demonstrates movement
of the talus within ankle mortise

atfl mechanism of injury - Answer-forced plantarflexion and inversion

inferior extinsor retinaculum - Answer-used for modified brostrom gould procedure to
strengthen atfl repair

ATFL - Answer-primary ligament stabilizer of the ankle
resists anterior translation of talus and internal rotation/inversion of talus during plantar
flexion/mechanism of injury
80% of ankle sprains result of inversion injury
origin: 15mm from distal tip of fibula
insertion: 18mm from to

CFL - Answer-2nd most important, primary lateral stabilizer of the subtalar joint, resists
inversion during dorsiflexion
tears primarily in inversion and ankle dorsiflexion - connects distal lateral malleolus to
calcaneus
origin: 4mm anterior to distal fibula

PTFL - Answer-resists posterior translation of talus, not a lot of clinical significance

peroneus brevis - Answer-lateral tendon, everts and abducts the foot, inserts 5th met

,peroneus longus - Answer-lateral tendon, everts foot, inserts 1st met/medial cuneiform

detloid ligament - Answer-serves to resist external rotation of the hindfoot, helps resist
valgus stress on talus, and stabilize the subtalar joint, gives stability to medial ankle
total of 6 ligaments/bands, separated into deep and superficial
superficial (4): from medial mal to sustentaculum tali (calc)!!! - Tibionavicular,
Tibiospring, Tibiocalcaneal (stabilizes the ankle joint & subtalar joint, connection
between distal tibia and calcaneous, most common ligament in deltoid reconstruction),
superficial posterior tibiotalar
deep (2): from medial mal to talus!!! - Deep posterior tibiotalar, Deep anterior tibiotalar
(most common in deltoid reconstruction)

medial ankle joint - Answer-deltoid ligament, consists of:
medial malleolus (tibia)
talus (head supported by calcaneus and spring ligament)
calcaneus (sustentaculum tali where deltoid and spring ligament insert)

deltoid mechanism of injury - Answer-forced eversion and external rotation

spring ligament - Answer-aka calcaneovaciluar ligament (superomedial & inferomedial),
Provides support to medial arch, Thought to also be a main reason for flatfoot deformity
if injured, Goes from ST to navicular, Supports talar head

PTT - Answer-inserts on plantar medial navicular tuberosity

FHL - Answer-connects to first metatarsal, May be used in conjunction with Achilles
reconstruction for tendon balancing with peroneal tendon deficiency

fdl - Answer-connects to lesser metatarsals, done with spring ligament for flatfoot, Used
for Posterior tibial tendon dysfunction

tenodesis screw sizes - Answer-2.5x7
3x8
4.75x15 (&19)
5.5x15
6.25x15
7x23
8x23

brostrom repair - Answer-just repairing atfl, can use fibertaks/suturetaks

brostrom gould repair - Answer-modified brostrom, inferior extinsor retinaculum included
to strengthen atfl repair

Brostrom w/ IB augmentation - Answer-repair atfl with fibertaks, use internal brace as
seatbelt that braces ATFL

, syndesmosis joint - Answer-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-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-15mm from distal tip of fibula

tensioning atfl ib - Answer-neutral with 10-15 degrees plantar flexion

medial mal anchor for deltoid ib - Answer-medial mal in intercollicular grove w/ 4.75
anchor

talus anchor in deltoid ib - Answer-deep deltoid, 12.2mm/1cm in talus

sustentaculum tali anchor for deltoid ib - Answer-superficial deltoid, 8mm anterior

deltoid recon - Answer-superficial tibiocalcaneal & deep posterior tibiotalar

superficial deltoid - Answer-4, resists eversion of hindfoot

deep deltoid - Answer-2, medial ankle sprain, lateral ankle sprain, ankle fracture, flatfoot

mechanical instability - Answer-clinical and radiographic evidence that demonstrates
excess movement of the talus within ankle mortise

functional instability - Answer-subjective complaint of patient

sorain classifications - Answer-Grade 1: ATFL sprain
Grade 2: ATFL & CFL partial tear
Grade 3: ATFL, CFL, and possibly PTFL

sural & superficial peroneal - Answer-nerves to watch out for with ATFL IB

syndesmosis mechanism of injury - Answer-forced external rotation of the foot
(specifically talus)

syndesmosis function - Answer-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

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