EXAMINATION TEST FINAL PAPER 2026
GRADED A+.
⫸ what feature does the grooves and beads have? Answer: keeps liner
in- retention
⫸ what feature does the slots and tabs have? Answer: aiming and
removal- MDM- morse taper friction fit
⫸ how does locking mechanism engage a poly liner? Answer: barbs
and scallops
⫸ how does the locking mechanism engage an MDM liner? Answer:
slots and tabs
⫸ where are the indexing scallops on an MDM insert or poly liner?
Answer: little indents on shell
⫸ what 3 things are on the shell? Answer: barbs, grooves, slots
⫸ what 3 things are on the liner? Answer: scallops, beads, tabs
⫸ where are the tabs on an MDM liner? Answer: on liner, little
bumps
, ⫸ where is the barb on a shell? Answer: little squares on shell
⫸ how many barbs are on the trident II Shell? Answer: 4
⫸ where is the removal tool slot on the shell? Answer: big space- flat
⫸ why might a surgeon consider the use of a 10 degree or an elevated
rim poly liner? Answer: 10- helps with dislocation- put on posterior
superior rim.
elevated rim- surgeon up even more worse- bad placement of shell
⫸ what is the average angulation of a trident II 6.5mm low profile
bone hex screw? Answer: 37
⫸ what component use the 6.5mm hex screws Answer: Clusterhole
HA, PSL, tritanium clusterhole, multi-hole ALL
⫸ explain the purpose of the square recess inside the dome of the
trident II acetabular implant Answer: fits with the square tip of the
new impactor, anti-rotation, no stress on cup, can leave in package to
pick up
⫸ what are window trials for? Answer: concentric- see if it is sitting
perfectly and if it is medial