DEX STUDY GUIDE TEST PAPER QUESTIONS
WITH THOROUGH ANSWER
EXPLANATIONS
●● Why is a solid 1.5mm Hex Driver included with the compression FT
Screw instrumentation?
To aid in screw removal
To increase torque when inserting the solof compression FT screws
To help countersink screws
To make the set look cool
Answer: To aid in screw removal
●● Which of the following is NOT a feature or a benefit of the 3.5mm
mini compression FT screw?
Variable stepped thread pitch
Improved torque transmission through a hexaglobe recess
Conical shaped outer diameter to gain final compression
Headless
Cannulated
Answer: Conical shaped outer diameter to gain final compression
,●● What are the screw lengths available in the 7.0,, X-large compression
FT screw system- (AR-8750S)?
20-50mm by 2mm increments, 55-90mm by 5 mm increments
35-120mm by 2mm increments
35-120mm by 5mm increments
35-140mm by 5mm increments
Answer: 35-120mm by 5mm increments
●● True or False: one of the ways the compression FT screws achieve
compression is by having a large pitch on the leading end and smaller
pitch on the trailing end
Answer: true
●● Which of the following is NOT a feature or benefit of the 2.5mm
micro compression FT screw?
Variable stepped thread pitch
Improved torque transmission through a hexalobe recess
Self-tapping flutes
Headless
Cannulated
Answer: Improved torque transmission through a hexalobe recess
,●● There are two main types of headless compression screws available
on the market. One is a "herbert" style screw that has threads at the
leading end, a smooth shaft, and threads at the trailing end or head of the
screw. The other type is similar to the Arthrex compression FT screws
that is fully threaded with variable thread pitch to gain compression.
True or False. The main advantage to using a fully threaded screw with
variable pitch is to gain purchase along the entire length of the screw
rather than depending on the head of a partially threaded screw to gain
and maintain purchase in just the near cortex
Answer: True
●● What are the lengths of the 2.5 micro compression FT screws?
8-14mm by 2mm increments, then 16-34mm by 1mm increments
8-14mm by 2mm increments, then 16-30mm by 1mm increments
8-14mm by 1mm increments, then 16-50mm by 2mm increments
8-14mm by 1mm increments, then 16-34mm by 2mm increments
Answer: 8-14mm by 1mm increments, then 16-50mm by 2mm
increments
●● Besides the actual size of the larger compression FT screws, what is
the key design difference between the 5.0 and 7.0 compression FT
screws compared to the smaller compression FT screws?
Variable threaded pitch
Cannulated
Comes with a profile drill
, Are tapered on the outer diameter
Headless design
Answer: Are tapered on the outer diameter
●● True or False: a 3.5 mini compression FT screws schieves a statically
significant higher maximum push-out when compared to an acumed
acutrak 2 mini screw and a synthes 3.0mm Hebert screw. This may lead
to a better long term stability and less likely screw backout/
Answer: false
●● When using a 3.5 mm DX SwiveLock® SL anchor in the metacarpal
head for reconstruction of the thumb UCL using SutureTape and a
palmaris longus autograft what size drill should be used?
3.2 mm
3.0 mm
3.5 mm
3.7 mm
Answer: 3.5 mm
●● Before placing the second SwiveLock® anchor for a thumb UCL IB
repair, the thumb should be placed in:
Neutral
60 degrees of extension
30 degrees of flexion
WITH THOROUGH ANSWER
EXPLANATIONS
●● Why is a solid 1.5mm Hex Driver included with the compression FT
Screw instrumentation?
To aid in screw removal
To increase torque when inserting the solof compression FT screws
To help countersink screws
To make the set look cool
Answer: To aid in screw removal
●● Which of the following is NOT a feature or a benefit of the 3.5mm
mini compression FT screw?
Variable stepped thread pitch
Improved torque transmission through a hexaglobe recess
Conical shaped outer diameter to gain final compression
Headless
Cannulated
Answer: Conical shaped outer diameter to gain final compression
,●● What are the screw lengths available in the 7.0,, X-large compression
FT screw system- (AR-8750S)?
20-50mm by 2mm increments, 55-90mm by 5 mm increments
35-120mm by 2mm increments
35-120mm by 5mm increments
35-140mm by 5mm increments
Answer: 35-120mm by 5mm increments
●● True or False: one of the ways the compression FT screws achieve
compression is by having a large pitch on the leading end and smaller
pitch on the trailing end
Answer: true
●● Which of the following is NOT a feature or benefit of the 2.5mm
micro compression FT screw?
Variable stepped thread pitch
Improved torque transmission through a hexalobe recess
Self-tapping flutes
Headless
Cannulated
Answer: Improved torque transmission through a hexalobe recess
,●● There are two main types of headless compression screws available
on the market. One is a "herbert" style screw that has threads at the
leading end, a smooth shaft, and threads at the trailing end or head of the
screw. The other type is similar to the Arthrex compression FT screws
that is fully threaded with variable thread pitch to gain compression.
True or False. The main advantage to using a fully threaded screw with
variable pitch is to gain purchase along the entire length of the screw
rather than depending on the head of a partially threaded screw to gain
and maintain purchase in just the near cortex
Answer: True
●● What are the lengths of the 2.5 micro compression FT screws?
8-14mm by 2mm increments, then 16-34mm by 1mm increments
8-14mm by 2mm increments, then 16-30mm by 1mm increments
8-14mm by 1mm increments, then 16-50mm by 2mm increments
8-14mm by 1mm increments, then 16-34mm by 2mm increments
Answer: 8-14mm by 1mm increments, then 16-50mm by 2mm
increments
●● Besides the actual size of the larger compression FT screws, what is
the key design difference between the 5.0 and 7.0 compression FT
screws compared to the smaller compression FT screws?
Variable threaded pitch
Cannulated
Comes with a profile drill
, Are tapered on the outer diameter
Headless design
Answer: Are tapered on the outer diameter
●● True or False: a 3.5 mini compression FT screws schieves a statically
significant higher maximum push-out when compared to an acumed
acutrak 2 mini screw and a synthes 3.0mm Hebert screw. This may lead
to a better long term stability and less likely screw backout/
Answer: false
●● When using a 3.5 mm DX SwiveLock® SL anchor in the metacarpal
head for reconstruction of the thumb UCL using SutureTape and a
palmaris longus autograft what size drill should be used?
3.2 mm
3.0 mm
3.5 mm
3.7 mm
Answer: 3.5 mm
●● Before placing the second SwiveLock® anchor for a thumb UCL IB
repair, the thumb should be placed in:
Neutral
60 degrees of extension
30 degrees of flexion
