1|Page
MSC ORT FINAL EXAM || MOST RECENT EXAM
ACTUAL COMPLETE REAL VERIFIED EXAM
QUESTIONS AND CORRECT ANSWERS (VERIFIED
ANSWERS) ALREADY GRADED A+ | NEWEST EXAM!!!
Which TKA implant fixation method is most common in
today's market? - Answer-- bone cement
How thick (microns) is hydroxyapatite (HA) coating? -
Answer-- 50 microns
Are there other options for porous coating for THA
components? - Answer-Yes
- beads, wires, cancellous structured metal (trabecular
metal)
Which 2 common implant metals are contraindicated for
use in the body, when in contact with one another? -
Answer-- SS and Ti
what is created when these SS and Ti come into contact?
- Answer-galvanic cells
,2|Page
Which area of orthopaedics routinely uses stainless steel
implants? - Answer-Trauma
What have we done to polyethylene to help reduce wear?
- Answer-crosslinked poly
What have we done to poly to help reduce oxidation? -
Answer-- infuse with vitamin E
(T/F) the early TKA designs were all hinge implants -
Answer-true
What is the term for the modern design of TKA? - Answer--
total knee arthroplasty
- total condylar knee
(T/F) the cam and post is another way of describing a
posterior stabilized (PS) knee component? - Answer-true
Would the surgeon that utilizes the cam and post type
implant be an anatomical or a functional surgeon? -
Answer-functional surgeon
,3|Page
In 1890, Themistocles Gluck implanted a hinged knee
made from ivory into a patient. What is the term we use to
state why this type of prosthesis can not hold up to the
forces put upon it in vivo? - Answer-it was not biofunctional
Which knee design allows for deeper flexion, CR or PS? -
Answer-CR knee
(T/F) flat on flat TKA design lead to an increase in
polyethylene wear and osteolysis - Answer-true
How did we resolve this issue of PE wear and osteolysis
that lead to better longevity of implants? - Answer-
crosslinking the polyethylene
What revision TKA design would be required if the patient
had a deficient LCL or MCL? Would this implant limit
motion and patient outcomes? - Answer-- constrained
condylar knee (CCK)
- limit medial lateral motion
- wouldn't limit outcomes compared to another CCK
, 4|Page
When a surgeon makes an anterior femoral resection,
which cuts deeper into the anterior femoral cortex than
intended, creating a "step" in the bone, what do we call
this? - Answer-- notching
When the poly articulating surface is opened and
implanted, what element does it get exposed to, which has
proved detrimental to it, and what have some companies
done to combat this issue? - Answer-- oxygen
- infuse with vitamin E (antioxidant)
- keep implants in a nitrogen rich area
(T/F) All unstable knee patients require a TKR Revision. -
Answer-true
What common reason for TKA failure requires a 2 stage
approach to resolve? - Answer-infection
Describe the process to complete this 2 stage approach in
a TKA? - Answer-1. remove everything and put in spacer
or PMMA (flush with antibiotics)
2. take out spacer and replace with new prosthesis
MSC ORT FINAL EXAM || MOST RECENT EXAM
ACTUAL COMPLETE REAL VERIFIED EXAM
QUESTIONS AND CORRECT ANSWERS (VERIFIED
ANSWERS) ALREADY GRADED A+ | NEWEST EXAM!!!
Which TKA implant fixation method is most common in
today's market? - Answer-- bone cement
How thick (microns) is hydroxyapatite (HA) coating? -
Answer-- 50 microns
Are there other options for porous coating for THA
components? - Answer-Yes
- beads, wires, cancellous structured metal (trabecular
metal)
Which 2 common implant metals are contraindicated for
use in the body, when in contact with one another? -
Answer-- SS and Ti
what is created when these SS and Ti come into contact?
- Answer-galvanic cells
,2|Page
Which area of orthopaedics routinely uses stainless steel
implants? - Answer-Trauma
What have we done to polyethylene to help reduce wear?
- Answer-crosslinked poly
What have we done to poly to help reduce oxidation? -
Answer-- infuse with vitamin E
(T/F) the early TKA designs were all hinge implants -
Answer-true
What is the term for the modern design of TKA? - Answer--
total knee arthroplasty
- total condylar knee
(T/F) the cam and post is another way of describing a
posterior stabilized (PS) knee component? - Answer-true
Would the surgeon that utilizes the cam and post type
implant be an anatomical or a functional surgeon? -
Answer-functional surgeon
,3|Page
In 1890, Themistocles Gluck implanted a hinged knee
made from ivory into a patient. What is the term we use to
state why this type of prosthesis can not hold up to the
forces put upon it in vivo? - Answer-it was not biofunctional
Which knee design allows for deeper flexion, CR or PS? -
Answer-CR knee
(T/F) flat on flat TKA design lead to an increase in
polyethylene wear and osteolysis - Answer-true
How did we resolve this issue of PE wear and osteolysis
that lead to better longevity of implants? - Answer-
crosslinking the polyethylene
What revision TKA design would be required if the patient
had a deficient LCL or MCL? Would this implant limit
motion and patient outcomes? - Answer-- constrained
condylar knee (CCK)
- limit medial lateral motion
- wouldn't limit outcomes compared to another CCK
, 4|Page
When a surgeon makes an anterior femoral resection,
which cuts deeper into the anterior femoral cortex than
intended, creating a "step" in the bone, what do we call
this? - Answer-- notching
When the poly articulating surface is opened and
implanted, what element does it get exposed to, which has
proved detrimental to it, and what have some companies
done to combat this issue? - Answer-- oxygen
- infuse with vitamin E (antioxidant)
- keep implants in a nitrogen rich area
(T/F) All unstable knee patients require a TKR Revision. -
Answer-true
What common reason for TKA failure requires a 2 stage
approach to resolve? - Answer-infection
Describe the process to complete this 2 stage approach in
a TKA? - Answer-1. remove everything and put in spacer
or PMMA (flush with antibiotics)
2. take out spacer and replace with new prosthesis
