Joints

Question 1

Time to driving after total knee

Answer 1

4 weeks

Question 2

Blood transfusion infection risk
HIV
HepC
HepB

Answer 2

1: 2 million
1: 2 million
1: 200,000

Question 3

Time to driving after knee arthroscopy

Answer 3

At least 1 week

Question 4

What to revise tibial component to with osteolysis and bone loss

Answer 4

Porous metal augmentation

Question 5

What produces highest risk for oxidized free radicals

Answer 5

Gamma irradiation in air

Question 6

What to order if pain with metal on metal hip after routine lab work?

Answer 6

Cobalt and chromium levels

mARS MR imaging

Question 7

Mcc of revision for failed metal on metal hip

Answer 7

Instability

Question 8

Varus deformity soft tissue release

Answer 8

Osteophytes
Meniscus
Deep MCL
Capsule
Semimembranosus
Superficial mcl

Question 9

Valgus knee soft tissue release

Answer 9

Osteophytes
Lateral capsule
It band if tight in extension
Popliteus if tight in flexion
Lcl

Question 10

Wear with intact acl vs incompetent acl

Answer 10

Intact: anteromedial
Compromised: posteromedial

Question 11

Labral tear

Answer 11

Groin pain with internal rotation and adduction

Lateral central edge angle less than 25 degrees abnormal…inadequate head coverage

Question 12

Adhesive wear

Answer 12

Most important in osteolysis

Micro PE gets stuck to prosthesis and debris get pulled off

Question 13

Abrasive wear

Answer 13

Cheese grafter effect of prosthesis scraping off particles

Question 14

Fatigue wear

Answer 14

Pitting and delamination

Question 15

Creep

Answer 15

Deformation without wear

Question 16

Gene mutation most likely to increased risk of clot after tha/TKA

Answer 16

Mthfr

Question 17

Vancouver treatment algorithm

Answer 17

A: address osteolysis, possible ORIF
B1:ORIF with cerclage and locking plates
B2:revision of component to long stem and ORIF
B3:revision component with prox fem allograft or prox fem replacement
C: ORIF with plate

Question 18

Lift off of tibial tray

Answer 18

Tight pick