Transfemoral prosthetic alignment

Question 1

available degrees of motion

Answer 1

4 translational
8 angular
4 rotational

Question 2

translational changes

Answer 2

4
inset and outset
knee and foot forward, knee and foot backward

Question 3

angular changes

Answer 3

8
Foot DF, PF, inversion,eversion
Socket- flexion,extension, ADD,ABD

Question 4

rotational changes

Answer 4

toe in and toe out
knee internal and external rotation

Question 5

Socket outset/foot inset

Answer 5

moment acting at the hip is lateral thrust

Question 6

socket inset/foot outset

Answer 6

moment acting the hip is medial thrust

Question 7

socket translated anterior

Answer 7

moves the GRF anterior to the knee for stability

Question 8

socket translated posteriorly

Answer 8

moves the GRF posterior to knee causing instability

Question 9

socket flexion

Answer 9

places hip in flexion
moves knee anterior to GRF
allow for relative extension

Question 10

socket extension

Answer 10

moves hip into extension
moves knee posterior to GRF

Question 11

socket adduction

Answer 11

places hip in adduction
moves GRF laterally
medial thrust at hip

Question 12

socket abduction

Answer 12

places hip in abduction
moves GRF medially
lateral thrust

Question 13

dorsiflexion

Answer 13

places hip in extension
moves knee anterior to GRF

Question 14

plantarflexion

Answer 14

places hip in flexion
moves knee posterior to GRF

Question 15

inversion and eversion

Answer 15

very little net effect on forces
lever are in 1/2 the width of the heel
set so that the foot is flat on the floor

Question 16

rotational changes

Answer 16

knee and foot rotation

Question 17

bench alignment

Answer 17

socket flexion
socket adduction
foot inset
knee posterior to socket

Question 17

socket flexion

Answer 17

allows for relative extension
normal 5-20° of flexion
increases hip extension force

Question 18

socket adduction
(shank or foot abduction)

Answer 18

promotes femoral adduction
maintains hip abductors on a stretch

Question 19

foot inset in relation to socket

Answer 19

controls thrusting of socket medially
prevents valgus moment at the hip

Question 19

knee posterior to socket
(socket anterior)

Answer 19

maintain weight line anterior to knee for extension moment
critical for knee stability

Question 20

Prosthetic gait deviation causes

patient causes

Answer 20

force
motor
motion
energy
patient specific factord

Question 21

Prosthetic gait deviation causes

prosthetic causes

Answer 21

component and alignment causes

Question 22

gait deviations caused by alignment

Answer 22

GRF
Joint moments/forces
prosthetic bench alignment
prosthetic height
changing heel heights/shoes