ARTHROPLASTY IOT LATEST
(ARTHREX) EXAM
What anatomic landmarks provide the boarders for the exposure field in
a TSA? - ANSWERS-Inferior = 3 sisters
Superior = rotator interval
Medial = conjoin tendons
Lateral = long bead of biceps
Explain the benefits (with respect to fixation and seating) and
advantages of the VaultLock Glenoid Component. How do the changes
improve glenoid preparation? - ANSWERS-The VaultLock implant
features a combination of 2 pegs and 1 keel. The pegs are fluted,
allowing for bony in-growth, while the inferior keel provides increased
stability to the construct. All together, the pegs and keel contribute to
t=0 stability.
The VaultLock implant also has a varying radius of curvature that is
proportionate to the size of the implant.
Allows for bone grafting.
What is the MGS baseplate coated in to promote bone in-growth? -
ANSWERS-BioSync
END OF
PAGE
1
, ARTHROPLASTY IOT LATEST
(ARTHREX) EXAM
Explain glenohumeral mismatch and the ideal amount as suggested by
Dr. Walch. - ANSWERS-5.5-7mm
What are the 4 components of a 4-part humeral fracture? - ANSWERS-
Greater tuberosity, lesser tuberosity, humeral head, humeral shaft.
Walch classification question. - ANSWERS-A = humeral head remains
centered on the glenoid.
B = Humeral head is subluxed from the glenoid.
C = Total humeral head/glenoid dysfunction.
Describe "superior escape," and the associated muscle/tendon. -
ANSWERS-Superior escape occurs in conjunction with supraspinatus
dysfunction. Without the inferior force coupling from the dysfunctional
supra, the humerus drifts upwards raising concern for articulation with
the AC joint.
Describe the lateral offset options built into the MGS glenoid baseplate.
- ANSWERS-neutral, +2, +4
END OF
PAGE
2
(ARTHREX) EXAM
What anatomic landmarks provide the boarders for the exposure field in
a TSA? - ANSWERS-Inferior = 3 sisters
Superior = rotator interval
Medial = conjoin tendons
Lateral = long bead of biceps
Explain the benefits (with respect to fixation and seating) and
advantages of the VaultLock Glenoid Component. How do the changes
improve glenoid preparation? - ANSWERS-The VaultLock implant
features a combination of 2 pegs and 1 keel. The pegs are fluted,
allowing for bony in-growth, while the inferior keel provides increased
stability to the construct. All together, the pegs and keel contribute to
t=0 stability.
The VaultLock implant also has a varying radius of curvature that is
proportionate to the size of the implant.
Allows for bone grafting.
What is the MGS baseplate coated in to promote bone in-growth? -
ANSWERS-BioSync
END OF
PAGE
1
, ARTHROPLASTY IOT LATEST
(ARTHREX) EXAM
Explain glenohumeral mismatch and the ideal amount as suggested by
Dr. Walch. - ANSWERS-5.5-7mm
What are the 4 components of a 4-part humeral fracture? - ANSWERS-
Greater tuberosity, lesser tuberosity, humeral head, humeral shaft.
Walch classification question. - ANSWERS-A = humeral head remains
centered on the glenoid.
B = Humeral head is subluxed from the glenoid.
C = Total humeral head/glenoid dysfunction.
Describe "superior escape," and the associated muscle/tendon. -
ANSWERS-Superior escape occurs in conjunction with supraspinatus
dysfunction. Without the inferior force coupling from the dysfunctional
supra, the humerus drifts upwards raising concern for articulation with
the AC joint.
Describe the lateral offset options built into the MGS glenoid baseplate.
- ANSWERS-neutral, +2, +4
END OF
PAGE
2
