Principles of Dynamic Orthoses

Question 1

what are components of dynamic orthoses?

Answer 1

base orthosis

cuff with tension (elastic or non elastic)

outrigger attachments (line guides= creates the angle pull 90)

Question 2

what structures can provide tension for dynamic orthoses?

Answer 2

rubber bands
coil springs
elastic thread

Question 3

how can The magnitude of force applied through dynamic traction can be measured?

Answer 3

using a Haldex gauge or clinical experience

Question 4

where should the axis of an articulating orthoses be aligned with anatomically?

Answer 4

the anatomical axis of the joint

Question 5

what can poor axis alignment on an articulating orthosis lead to?

Answer 5

risk of ineffective attempts to improve mobility and/or
shearing forces

Question 6

what is torque?

Answer 6

force x length of lever (T=F x FA)

Question 7

what is the relationship between the point of attachment and the joint axis?

Answer 7

as the distance between the joint axis and the point of attachment of the
dynamic assist increases, the
amount of torque on the joint
increases