DEX IOT QUESTIONS AND VERIFIED ANSWERS
What fracture types is the TightRope XP indicated for? - Answers - Weber B & C
What are the dimensions of the TightRope XP's....
1. Oblong button
2. Round button - Answers - 1. Oblong - 3.5 x 13 mm
2. Round - 6.5 mm
What is the mechanism of injury for syndesmotic injuries? - Answers - Forced external
rotation of the foot
What is the structure associated with the AiTFL on the Tibia? - Answers - Chaput's
Tubercle
What is the structure associated with the AiTFL on the Fibula? - Answers - Wagstaffe's
tubercle
What is the shelf life of Amnion Matrix? - Answers - 5 years
What is the shelf life of Amnion Viscous? - Answers - 2 years
What is the volume range for autologous fluid that can be processed in the Angel? -
Answers - 40 cc - 180 cc
What are the storage requirements for ArthroCell?
1. Storage temperature
2. Shelf Life - Answers - 1. -65° C (must be used within 4 hours after thawing)
2. 2-year shelf life
What is ArthroFlex and what is its primary function? - Answers - Acellular dermal matrix
Functions as a scaffold of collagen, elastin, and growth factors
MatraCell process for sterilization removes ____ % of DNA - Answers - >97% of DNA
removed
What are the storage requirements for ArthroFlex?
1. Storage temperature
2. Shelf life - Answers - 1. Room temp; ready-to-use
2. 3-year shelf-life
What are the storage requirements for BioCartilage?
1. Storage temperature
2. Shelf life - Answers - 1. Room temp storage
,2. 5-year shelf life
What are the storage requirements
for Cartiform?
1. Storage temperature
2. Shelf life - Answers -
How much spacing is between the TightRope XP holes of the Buttress plate? What is
the hole spacing of a standard plate? - Answers - Buttress plate - 22 mm
Standard plate - 16 mm
How many degrees of angulation does the Buttress Plate allow for anatomic placement
of the TightRope XP implants? - Answers - 35° of angulation
How thick is the TightRope Buttress Plate? - Answers - 1.5 mm thick
How should the 2-Hole Buttress Plate be positioned on the lateral fibula? - Answers -
Distal hole should be centered 1.5-2 cm proximal to the tibial plafond
How big are the TightRope XP gudiewires? - Answers - 0.049 in / 1.2 mm
How many cycles does the TightRope persist compared to a 4.5 Synthes screw? -
Answers - TR: 27,000 cycles to failure
4.5 screw: 11,000 cycles to failure
How many distal screws can be placed through the FibuLock? - Answers - 3 screws: 2
lateral-medial, 1 anterior-posterior
Where should the incision be made for the FibuLock entry point? - Answers - 1 cm distal
to the tip of the fibula
To what diameters do the 3.0 and 3.8 mm FibuLock nails expand to after talon actuation
- Answers - 3.0 nail --> 5 mm
3.8 nail --> 6 mm
What does the Offset guide do in the FibuLock instrument set? - Answers - Allows for
drilling of guide wires 2.5 or 5 mm from an initial K-wire position
What is Tom, Dick, ANd Harry? - Answers - Mnemonic for remembering the location of
tissue on the medial side of the ankle from anterior to posterior
Tom = tibialis posterior
Dick = flexor digitorum longus
A = posterior tibial artery
N = tibial nerve
Harry = flexor hallucis longus
,deep posterior tendons
Which of the following toe deformities includes hyperextension of the MTP joint, flexion
of the PIP joint, and flexion of the DIP joint?
- (A): Hammer Toe
- (B): Claw Toe
- (C): Mallet Toe - Answers - MTP: Hyper extension + PIP/DIP: Flexion =
(B) Claw Toe
Lisfranc injuries are commonly due to which of the following mechanism(s)?
- (A): Motor vehicle accidents
- (B): Falls from heights
- (C): Athletic injuries
- (D): All of the above - Answers - (D) All of the above
What is another name for the Tarsal-Metatarsal Joint of the foot?
- (A): Charcotʼs Joint
- (B): The Hinged Joint
- (C): The PIP Joint
- (D): Lisfrancʼs Joint - Answers - TMT Joint of the foot =
(D) Lisfranc's Joint
Which of the following terms is NOT used to describe the malposition of a fracture?
- (A): Angulation
- (B): Translation
- (C): Shortening
- (D): Comminution - Answers - (D) Comminution
For an ankle fracture classified as a Danis-Weber type B a surgeon needs to be
concerned about an unstable syndesmosis joint.
- (A): True
- (B): False - Answers - (A) True
A surgeonʼs start point with FibuLock is too lateral. What deformity at the fracture is
possible?
- (A): Varus
- (B): Valgus
- (C): Recurvatum (apex-posterior)
- (D): Procurvatum (apex-anterior) - Answers - (A) Varus
, Hyperextension of the MTP and Flexion of the PIP joints defines which of the following
deformities?
- (A): Mallet Toe
- (B): Hammer Toe
- (C): Tiger Toe
- (D): All of the above - Answers - (B) Hammer Toe
What joint between the calcaneus and the talus supports most of the bodyweight?
- (A): Anterior Facet
- (B): Middle Facet
- (C): Posterior Facet
- (D): Inferior Facet - Answers - C. Posterior Facet
The normal Hallux Valgus Angle (HVA) is:
- (A): < 5°
- (B): < 9°
- (C): < 15°
- (D): < 20° - Answers - Normal HVA =
C. < 15°
The normal IMA is:
- (A): 8° - 12°
- (B): < 9°
- (C): 15° - 20°
- (D): 10° - 15°
- (E): 9° - 15° - Answers - Normal IMA =
(B) < 9°
Hallux varus is usually due to the following pitfalls after hallux valgus correction
EXCEPT:
- (A): Excessive resection of medial eminence
- (B): Overcorrection of IMA
- (C): Excessive tightening of lateral capsule MTP Joint
- (D): Excessive release of lateral structures - Answers - C. Excessive tightening of the
lateral capsule MTP joint
The main deforming forces in the hallux valgus deformity are:
- (A): Adductor hallucis and intermetatarsal ligament
What fracture types is the TightRope XP indicated for? - Answers - Weber B & C
What are the dimensions of the TightRope XP's....
1. Oblong button
2. Round button - Answers - 1. Oblong - 3.5 x 13 mm
2. Round - 6.5 mm
What is the mechanism of injury for syndesmotic injuries? - Answers - Forced external
rotation of the foot
What is the structure associated with the AiTFL on the Tibia? - Answers - Chaput's
Tubercle
What is the structure associated with the AiTFL on the Fibula? - Answers - Wagstaffe's
tubercle
What is the shelf life of Amnion Matrix? - Answers - 5 years
What is the shelf life of Amnion Viscous? - Answers - 2 years
What is the volume range for autologous fluid that can be processed in the Angel? -
Answers - 40 cc - 180 cc
What are the storage requirements for ArthroCell?
1. Storage temperature
2. Shelf Life - Answers - 1. -65° C (must be used within 4 hours after thawing)
2. 2-year shelf life
What is ArthroFlex and what is its primary function? - Answers - Acellular dermal matrix
Functions as a scaffold of collagen, elastin, and growth factors
MatraCell process for sterilization removes ____ % of DNA - Answers - >97% of DNA
removed
What are the storage requirements for ArthroFlex?
1. Storage temperature
2. Shelf life - Answers - 1. Room temp; ready-to-use
2. 3-year shelf-life
What are the storage requirements for BioCartilage?
1. Storage temperature
2. Shelf life - Answers - 1. Room temp storage
,2. 5-year shelf life
What are the storage requirements
for Cartiform?
1. Storage temperature
2. Shelf life - Answers -
How much spacing is between the TightRope XP holes of the Buttress plate? What is
the hole spacing of a standard plate? - Answers - Buttress plate - 22 mm
Standard plate - 16 mm
How many degrees of angulation does the Buttress Plate allow for anatomic placement
of the TightRope XP implants? - Answers - 35° of angulation
How thick is the TightRope Buttress Plate? - Answers - 1.5 mm thick
How should the 2-Hole Buttress Plate be positioned on the lateral fibula? - Answers -
Distal hole should be centered 1.5-2 cm proximal to the tibial plafond
How big are the TightRope XP gudiewires? - Answers - 0.049 in / 1.2 mm
How many cycles does the TightRope persist compared to a 4.5 Synthes screw? -
Answers - TR: 27,000 cycles to failure
4.5 screw: 11,000 cycles to failure
How many distal screws can be placed through the FibuLock? - Answers - 3 screws: 2
lateral-medial, 1 anterior-posterior
Where should the incision be made for the FibuLock entry point? - Answers - 1 cm distal
to the tip of the fibula
To what diameters do the 3.0 and 3.8 mm FibuLock nails expand to after talon actuation
- Answers - 3.0 nail --> 5 mm
3.8 nail --> 6 mm
What does the Offset guide do in the FibuLock instrument set? - Answers - Allows for
drilling of guide wires 2.5 or 5 mm from an initial K-wire position
What is Tom, Dick, ANd Harry? - Answers - Mnemonic for remembering the location of
tissue on the medial side of the ankle from anterior to posterior
Tom = tibialis posterior
Dick = flexor digitorum longus
A = posterior tibial artery
N = tibial nerve
Harry = flexor hallucis longus
,deep posterior tendons
Which of the following toe deformities includes hyperextension of the MTP joint, flexion
of the PIP joint, and flexion of the DIP joint?
- (A): Hammer Toe
- (B): Claw Toe
- (C): Mallet Toe - Answers - MTP: Hyper extension + PIP/DIP: Flexion =
(B) Claw Toe
Lisfranc injuries are commonly due to which of the following mechanism(s)?
- (A): Motor vehicle accidents
- (B): Falls from heights
- (C): Athletic injuries
- (D): All of the above - Answers - (D) All of the above
What is another name for the Tarsal-Metatarsal Joint of the foot?
- (A): Charcotʼs Joint
- (B): The Hinged Joint
- (C): The PIP Joint
- (D): Lisfrancʼs Joint - Answers - TMT Joint of the foot =
(D) Lisfranc's Joint
Which of the following terms is NOT used to describe the malposition of a fracture?
- (A): Angulation
- (B): Translation
- (C): Shortening
- (D): Comminution - Answers - (D) Comminution
For an ankle fracture classified as a Danis-Weber type B a surgeon needs to be
concerned about an unstable syndesmosis joint.
- (A): True
- (B): False - Answers - (A) True
A surgeonʼs start point with FibuLock is too lateral. What deformity at the fracture is
possible?
- (A): Varus
- (B): Valgus
- (C): Recurvatum (apex-posterior)
- (D): Procurvatum (apex-anterior) - Answers - (A) Varus
, Hyperextension of the MTP and Flexion of the PIP joints defines which of the following
deformities?
- (A): Mallet Toe
- (B): Hammer Toe
- (C): Tiger Toe
- (D): All of the above - Answers - (B) Hammer Toe
What joint between the calcaneus and the talus supports most of the bodyweight?
- (A): Anterior Facet
- (B): Middle Facet
- (C): Posterior Facet
- (D): Inferior Facet - Answers - C. Posterior Facet
The normal Hallux Valgus Angle (HVA) is:
- (A): < 5°
- (B): < 9°
- (C): < 15°
- (D): < 20° - Answers - Normal HVA =
C. < 15°
The normal IMA is:
- (A): 8° - 12°
- (B): < 9°
- (C): 15° - 20°
- (D): 10° - 15°
- (E): 9° - 15° - Answers - Normal IMA =
(B) < 9°
Hallux varus is usually due to the following pitfalls after hallux valgus correction
EXCEPT:
- (A): Excessive resection of medial eminence
- (B): Overcorrection of IMA
- (C): Excessive tightening of lateral capsule MTP Joint
- (D): Excessive release of lateral structures - Answers - C. Excessive tightening of the
lateral capsule MTP joint
The main deforming forces in the hallux valgus deformity are:
- (A): Adductor hallucis and intermetatarsal ligament
