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19 Cards in this Set
- Front
- Back
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What is the function of the tibial polyethylene in a TKA prosthesis?
A-by being attached to the femoral condyles it confirms to the shape after the bone cuts have been made B-to fill the spaces previously occupied between the meniscus and the bone that has been removed C-it is used to measure the amount is resection required on the Tibia D-by being attached to the proximal tibia, it conforms to the shape after the bone cuts have been made |
B |
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Which is not one of the anatomical landmarks the surgeon uses as a guide for Whiteside's line? A-perpendicular to the TEA B-the deepest part of the trochlear groove C-parallel to the TEA D-in the center of the intercondylar notch |
C |
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What is the basic difference between TKA and PKR? A-TKA is surgical procedure. PKR is non - invasive procedure B-TKA is a procedure in which only the most damaged portion of the knee is replaced. PKR is a procedure in which all anatomical structures of the knee are replaced C-A patient who has had a TKA always requires extensive post op physical therapy. A patient who has had PKR is generally able to function normally within a week of the surgical procedure D-TKA is a procedure in which all anatomical structures of the knee are replaced. PKR is a procedure in which only the most damaged portion of the knee is replaced |
D |
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Interaction among the surfaces, stabilizers, and muscles of the knee joint provides: A-the stability to withstand considerable forces B-Mobility and stability C-Proper knee articulation D-Lubrication that allows the knee joint to move easily |
B |
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What type of joint is the knee? |
Synovial joint |
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What is the function of the ACL? |
Prevents the Tibia from translating anteriorly on the femur. Runs from the anterior of the Tibia to the medial side of the femur's lateral condyle |
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What is the most common type of arthritis? |
Osteoarthritis |
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Which of the following radiographic views might a surgeon order to determine if a patient had chondromalacia patella? |
Skyline/sunrise view |
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What are the 3 arcs of motion? |
1-screw home arc - between 10 and - 5 deg of full extension/knee locked in position and requires little assistance from muscles. Tibia rotates externally during terminal extension
2-Functional Arc - Affords the greatest ROM/Occurs between 10 and approx 120 deg of flexion. Femur rotates externally with reference to the Tibia
3-Deep Flexion Arc - Knee flexes beyond 120 deg (generally considered 145-160 deg). Femur rotates externally with reference to the Tibia, translates posteriorly to create spaces |
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What is the transepicondylar axis? |
A line passing through the apexes is the medial and lateral femoral epicondyles |
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What is the Mechanical axis of the femur? |
The angle of a line drawn from the centre of the femoral head to the center of the ankle |
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What is the anatomical axis of the femur? |
A line that runs parallel to the shaft of the upper and lower leg bones. Approximately 6 deg of valgus from the mechanical axis |
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What are the components of TKA (4)? |
Femoral component, Poly, Tibial BP, Patella implant |
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What is the benefit of a high degree of conformity between the femoral component and the tibial poly? |
To minimize stress |
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The Patellafemoral joint is: |
An intermediate joint between the patella and the femur |
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Which of the following functions as the anterior covering of the knee joint cavity? |
Patella |
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Which of the following is NOT true of the patella? |
Small bone located posterior to the knee joint |
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To which deformity do the following symptoms apply? Joint space narrowing on the medial side; contraction of the MCL; development of tibial osteophytes; sclerotic changes to the bone: |
Varus knee |
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To which arc of motion does the following description apply? Affords the greatest range of motion; occurs when the knee flexes beyond 10' ; extends to approximately 120' of flexion |
Functional arc |
