Arthroplasty final Exam with Complete Solutions

Arthroplasty final Exam with Complete
Solutions

What are the lateralizing options for MGS? Correct Ans-Baseplate 0, +2, +4, Glenosphere 0,
+2.5 inferior, +4 lateral




What are all the different offset? Correct Ans-1mm - secondary reamer for the universal
glenoid (post correction reamer)

1.5mm - pressfit for all stems

2mm - head go up by 2

2.5mm - inferior offset of glenosphere for MGS

3mm - Glenosphere goes up by 3mm

3.5mm - head offset eccentric

4mm - glenosphere +4 lateral offset




What are the humeral head sizes for Apex and Univers II? Correct Ans-(EVEN) 40mm - 56mm
increase by 2




What are the humeral head sizes for Eclipse? Correct Ans-(ODD) 37mm-55mm increase by 2




Universal baseplate pros and cons? Correct Ans-Pro - it's convertable

Con - people tend to overstuff the joint causing failure to the RC too much stress

, True or False: Eclipse can have overhang Correct Ans-False




VIP benefits Correct Ans--Custom guide with proper pin placement

-retroversion

-inclination




VIP planning options Correct Ans-baseplates

lateralization

5D

3D bone model

plan only




What are the views of X-ray? Correct Ans-axillary

AP lateral




What is love at first bite? Correct Ans--first broach that has reasonable fixation and satisfying
fixation stop

-larger the implant, more likely to lead to stress shielding

-fracture is possible (1.5mm of press fit)