TAA

Question 1

Foot consists of

Answer 1

tarsals
metatarsals
phalanges

Question 2

Talus transfer most of the weight from…

Answer 2

tibia to the calcaneus

Question 3

The ankle is a _ joint

Answer 3

hinge

Question 4

What three bones form the ankle

Answer 4

tibia
fibula
talus

Question 5

Primary weight bearing surface

Answer 5

distal surface of the tibia and the trochlea of the talus

Question 6

3 joints that provide the stability

Answer 6

proximal tibiofibular joint
distal tibiofibular joint
fibulotalar joint

Question 7

the ankle articular capsule ligaments

Answer 7

medial deltoid ligament
3 lateral ligaments

Question 8

anterior + posterior portions are…

Answer 8

thin

Question 9

lateral and medial surfaces _____ and reinforces by _____ ligaments

Answer 9

strong
stout

Question 10

foot motion occurs about 3 axes

Answer 10

dorsiflexion and plantarflexion
eversion and inversion
abduction and adduction

Question 11

mitered hinge model of leg

Answer 11

tibia internally rotates, the subtalar joint evert (eversion)
tibia externally rotates, the subtalar joint invert (inversion)

Question 12

Ankle dieases

Answer 12

osteoarthritis, rheumatoid arthritis, fused ankle, failed TAA

Question 13

Symptoms of ankle diseases

Answer 13

inflammation, wear of cartilage (bone on bone contact)
swelling and pain during gait + up/down stairs
joint deformation

Question 14

treatments

Answer 14

bracing and shoe wear alterations
joint injections
ankle joint debridement
distraction
arthrodesis
arthroplasty

Question 15

components of TAA

Answer 15

Tibial component
talar component
bearing component

Question 16

bearings can be

Answer 16

fixed
mobile

Question 17

candidates for TAA

Answer 17

older patients with joint problems
normal alignment of bone tissue
stability of ankle and foot
no history of septic arthritis
not very active patient
not over weight

Question 18

greatest failure mode of TAA

Answer 18

implant loosening
-greater in constrained designs
-cemented prosthesis

Question 19

Ankle arthrodesis of fusion consist of

Answer 19

removal of articular cartilages
internal fixation of talus and tibia
fixation of fibula is controversial

Question 20

cons of ankle arthrodesis

Answer 20

fusion of ankle joint
increase stress in other joints (subtalar)
additional fusion
pain + arthritis in other joints

Question 21

cons of TAA

Answer 21

wear of joint implant
material debris
loosening of implant + interface
revision often requires custom implant (bone graft)

Question 22

What is TAA

Answer 22

Replacement of articulating surfaces (tibial and talar)
tibial comp (metal implant with short stem)
talar comp (metal articulating surface)
bearing (UHMW polymer)

Question 23

studies show that the talar component….

Answer 23

deforms the liner, articulating with the deformed component

Question 24

what is ankle arthrodesis

Answer 24

removal of articular cartilage
fixing the talus and tibia together
fuses the ankle joint (no movement)