ARTHROPLASTY EXAM QUESTIONS WITH ACCURATE
SOLUTIONS (EXPERT VERIFIED) SCORED A+
What is the most common glenoid component used Right Ans - VaultLock
What is the main objective of a TSA Right Ans - Restore Anatomy. A rTSA
Recreates Anatomy
What attaches to the stem/baseplate on the humeral side of a rTSA Right
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 Right Ans - Constrained is rTSA,
Unconstrained is TSA
What is always needed in the cup in a rTSA Right Ans - A Poly Liner
Who is considered the God Father of shoulder Arthroplasty Right Ans - Dr.
Neer
What neck shaft inclination angle would Grammont cut at for his humeral side
in a rTSA Right Ans - 155 Degrees
What neck shaft inclination angle would Frankle cut at Right Ans - 135
Degrees
4 landmarks to consider during total shoulder arthroplasty Right Ans -
Lesser tuberosity, greater tuberosity, surgical neck, anatomic neck
What landmark separates the epiphysis from the metaphysis Right Ans -
Anatomic neck
What landmark separates the metaphysis from the diaphysis Right Ans -
Surgical neck
What landmark separates where cartilage meets bone Right Ans -
Anatomic neck
, What is the average inclination angle for most patients Right Ans - 130-135
degrees
What is the inclination angle Right Ans - Angle of anatomic neck relative to
the axis
According to Walch, what percentage of the humeral head is spherical
Right Ans - 90%
What portion of the sphere of the humeral head is articular cartilage Right
Ans - 1/3
What is medial offset Right Ans - Articular surface is offset medially
relative to the axis, average is 6.8mm offset
On average, how much is the humeral head retroverted Right Ans - 20
degrees
How much retroversion is added to the humeral head version from the
forearm Right Ans - An additional 10 degrees, 30 degrees total from the
forearm
What is the variability in version of the glenoid Right Ans - Glenoid has plus
or minus 10 degrees
What does the letter and number represent in the Walch classification scale
Right 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 Right Ans - Anterior instability
What can excessive retroversion lead to Right Ans - Posterior instability
For a Walch classification of A3, where would the glenoid wear be located
Right Ans - The humeral head is centered on the glenoid, therefore the wear is
centered and medial creating a constrained cup like wear pattern
SOLUTIONS (EXPERT VERIFIED) SCORED A+
What is the most common glenoid component used Right Ans - VaultLock
What is the main objective of a TSA Right Ans - Restore Anatomy. A rTSA
Recreates Anatomy
What attaches to the stem/baseplate on the humeral side of a rTSA Right
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 Right Ans - Constrained is rTSA,
Unconstrained is TSA
What is always needed in the cup in a rTSA Right Ans - A Poly Liner
Who is considered the God Father of shoulder Arthroplasty Right Ans - Dr.
Neer
What neck shaft inclination angle would Grammont cut at for his humeral side
in a rTSA Right Ans - 155 Degrees
What neck shaft inclination angle would Frankle cut at Right Ans - 135
Degrees
4 landmarks to consider during total shoulder arthroplasty Right Ans -
Lesser tuberosity, greater tuberosity, surgical neck, anatomic neck
What landmark separates the epiphysis from the metaphysis Right Ans -
Anatomic neck
What landmark separates the metaphysis from the diaphysis Right Ans -
Surgical neck
What landmark separates where cartilage meets bone Right Ans -
Anatomic neck
, What is the average inclination angle for most patients Right Ans - 130-135
degrees
What is the inclination angle Right Ans - Angle of anatomic neck relative to
the axis
According to Walch, what percentage of the humeral head is spherical
Right Ans - 90%
What portion of the sphere of the humeral head is articular cartilage Right
Ans - 1/3
What is medial offset Right Ans - Articular surface is offset medially
relative to the axis, average is 6.8mm offset
On average, how much is the humeral head retroverted Right Ans - 20
degrees
How much retroversion is added to the humeral head version from the
forearm Right Ans - An additional 10 degrees, 30 degrees total from the
forearm
What is the variability in version of the glenoid Right Ans - Glenoid has plus
or minus 10 degrees
What does the letter and number represent in the Walch classification scale
Right 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 Right Ans - Anterior instability
What can excessive retroversion lead to Right Ans - Posterior instability
For a Walch classification of A3, where would the glenoid wear be located
Right Ans - The humeral head is centered on the glenoid, therefore the wear is
centered and medial creating a constrained cup like wear pattern
