Arthroplasty- Test Questions & Answers
What is the most common glenoid component used Correct Ans-VaultLock
What is the main objective of a TSA Correct Ans-Restore Anatomy. A rTSA Recreates Anatomy
What attaches to the stem/baseplate on the humeral side of a rTSA Correct Ans-A cup that
articulates with the Glenosphere. A spacer can be added in the cup as well if the humerus needs
to be built up
Between TSA and rTSA, which one creates a constrained joint and which creates an
unconstrained joint Correct Ans-Constrained is rTSA, Unconstrained is TSA
What is always needed in the cup in a rTSA Correct Ans-A Poly Liner
Who is considered the God Father of shoulder Arthroplasty Correct Ans-Dr. Neer
What neck shaft inclination angle would Grammont cut at for his humeral side in a
rTSA Correct Ans-155 Degrees
What neck shaft inclination angle would Frankle cut at Correct Ans-135 Degrees
,4 landmarks to consider during total shoulder arthroplasty Correct Ans-Lesser tuberosity,
greater tuberosity, surgical neck, anatomic neck
What landmark separates the epiphysis from the metaphysis Correct Ans-Anatomic neck
What landmark separates the metaphysis from the diaphysis Correct Ans-Surgical neck
What landmark separates where cartilage meets bone Correct Ans-Anatomic neck
What is the average inclination angle for most patients Correct Ans-130-135 degrees
What is the inclination angle Correct Ans-Angle of anatomic neck relative to the axis
According to Walch, what percentage of the humeral head is spherical Correct Ans-90%
What portion of the sphere of the humeral head is articular cartilage Correct Ans-1/3
What is medial offset Correct Ans-Articular surface is offset medially relative to the axis,
average is 6.8mm offset
On average, how much is the humeral head retroverted Correct Ans-20 degrees
, How much retroversion is added to the humeral head version from the forearm Correct Ans-
An additional 10 degrees, 30 degrees total from the forearm
What is the variability in version of the glenoid Correct Ans-Glenoid has plus or minus 10
degrees
What does the letter and number represent in the Walch classification scale Correct Ans-The
letter represents humeral head placement on the glenoid and the number represents the
amount of wear on it
What can excessive anteversion lead to Correct Ans-Anterior instability
What can excessive retroversion lead to Correct Ans-Posterior instability
For a Walch classification of A3, where would the glenoid wear be located Correct Ans-The
humeral head is centered on the glenoid, therefore the wear is centered and medial creating a
constrained cup like wear pattern
What does the Walch B classification indicate Correct Ans-The humeral head is not centered,
sits posteriorly, possible torn rotator cuff
What is a paleo glenoid Correct Ans-It is the original, native glenoid
What is the most common glenoid component used Correct Ans-VaultLock
What is the main objective of a TSA Correct Ans-Restore Anatomy. A rTSA Recreates Anatomy
What attaches to the stem/baseplate on the humeral side of a rTSA Correct Ans-A cup that
articulates with the Glenosphere. A spacer can be added in the cup as well if the humerus needs
to be built up
Between TSA and rTSA, which one creates a constrained joint and which creates an
unconstrained joint Correct Ans-Constrained is rTSA, Unconstrained is TSA
What is always needed in the cup in a rTSA Correct Ans-A Poly Liner
Who is considered the God Father of shoulder Arthroplasty Correct Ans-Dr. Neer
What neck shaft inclination angle would Grammont cut at for his humeral side in a
rTSA Correct Ans-155 Degrees
What neck shaft inclination angle would Frankle cut at Correct Ans-135 Degrees
,4 landmarks to consider during total shoulder arthroplasty Correct Ans-Lesser tuberosity,
greater tuberosity, surgical neck, anatomic neck
What landmark separates the epiphysis from the metaphysis Correct Ans-Anatomic neck
What landmark separates the metaphysis from the diaphysis Correct Ans-Surgical neck
What landmark separates where cartilage meets bone Correct Ans-Anatomic neck
What is the average inclination angle for most patients Correct Ans-130-135 degrees
What is the inclination angle Correct Ans-Angle of anatomic neck relative to the axis
According to Walch, what percentage of the humeral head is spherical Correct Ans-90%
What portion of the sphere of the humeral head is articular cartilage Correct Ans-1/3
What is medial offset Correct Ans-Articular surface is offset medially relative to the axis,
average is 6.8mm offset
On average, how much is the humeral head retroverted Correct Ans-20 degrees
, How much retroversion is added to the humeral head version from the forearm Correct Ans-
An additional 10 degrees, 30 degrees total from the forearm
What is the variability in version of the glenoid Correct Ans-Glenoid has plus or minus 10
degrees
What does the letter and number represent in the Walch classification scale Correct Ans-The
letter represents humeral head placement on the glenoid and the number represents the
amount of wear on it
What can excessive anteversion lead to Correct Ans-Anterior instability
What can excessive retroversion lead to Correct Ans-Posterior instability
For a Walch classification of A3, where would the glenoid wear be located Correct Ans-The
humeral head is centered on the glenoid, therefore the wear is centered and medial creating a
constrained cup like wear pattern
What does the Walch B classification indicate Correct Ans-The humeral head is not centered,
sits posteriorly, possible torn rotator cuff
What is a paleo glenoid Correct Ans-It is the original, native glenoid
