Orthotics SMO, IMO, AFO Flashcards Preview

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Flashcards in Orthotics SMO, IMO, AFO Deck (43):
1

What motions does an SMO control

Probation, Supination, and plantar flexion*

2

Forces acting to control Supination with an SMO

Primary: L-M at the talus
Secondary: M-L at the medial malleoli/Superior timeline
Secondary: M-L at the 1st met head from shoe/Orthotic

3

Forces acting to control Pronation with a SMO

Primary: M-L at the talus
Secondary: L-M at the lateral malleoli
Secondary: L-M at the 5th met head

4

Forces controlling Supination at using an IMO

Primary: L-M at the talus
Secondary: M-L at the Calcaneus
Secondary: M-L at the 1st met head from shoe/Orthotic

5

Forces acting to control Pronation with a IMO

Primary: M-L at the talus
Secondary: L-M at the Calcaneus
Secondary: L-M at the 5th met head

6

When is a SMO recommended

When medial to lateral is not adequently controlled or PF needs controlling

7

How can an SMO control PF

If it has a heel back it controls PF similar to an AFO

8

Proper alignment of an SMO.
(Post, late, med, ant)

Posterior: Heel cup is vertical or slight virus
Lateral View: Hindfoot, midfoot, and forefoot are in neutral
Superior View: Forefront is neutral and bisecting heel. Line should pass between 2nd and 3rd met
Anterior: All metatarsal heads are level

9

What will a SMO for a flexible deformity look like

Will be aligned to neutral

10

What will a SMO for a rigid deformity look like

Not aligned to neutral but to the most optimal alignment possible in regards to the deformity

11

What is an indication for a full foot plate

Pt has no active toe extension
Toe Clawing

12

Benefit of a semi-rigid or flexible foot plate

Use for ambulation because it allows the mets to break

13

Indication for a rigid foot plate

Foot amputees, presence of a toe filler, they are not able to stand with neutral foot alignment

14

Where does a partial foot plate end and why use it

Proximal or at the met heads. If the patient can actively extend the toes for food swing in the gait phase

15

IMO vs shoe mods

IMO is closer to the anatomical shape of a foot
IMO is interchangeable that can be placed in multiple shoes

16

What are some functions of the foot and ankle

Shock absorber
Push of for gait
Mobility
Stability

17

Which side is structurally designed for mobility and which side for mobility

Medial side: Mobility
Lateral side: stability

18

Which motions are most favored at the Talocural joint

PF and DF

19

Which motions are favored at the subtalar joint

Inversion and Eversion

20

What motions occur at each joint for pronation of the foot

TC: DF
Subtler: Everson
Midtarsal: DF
Tarsal/Metatarsal: Forefoot abduction

21

What motions occur at each joint for Supination of the foot

TC: PF
Subtler: Inversion
Midtarsal: PF
Tarsal/metatarsal: Abdduction

22

What is occurring up the kinematic chain with foot pronation

Hip: Flexion, Abduction, IR
Tibia: IR
Knee Flex, valgus
Lumbar spine: extension

23

What is occurring up the kinematic chain with foot Supination

Tib: ER
Knee: Extends and Varus
Hip: Adduction, ER, Extended
Lumbar flexed

24

How can a shoe act as an Orthotics

Provides stability, alignment, and a shock absorber.

25

What are AFO's made from

Plastic
Metal
Hybrid

26

What are the types of plastic foot Orthotics

SAFO: solid foot Orthotics
HAFO: hinged foot Orthotic.
(AAFO: articulated)

27

What is the purpose of a Posterior leaf spring Orthotics

Will act as a DF assist
Will not control any other motions

28

What is the purpose of a spiral Orthotics

Has a Dorsi flexion assist

29

Why use a metal AFO

Advised to use when pt weight fluxuates or there is edema

30

What motions does a SAFO control

PF, DF, Probation, Supination

31

Forces to control Plantar flexion in AFO

Primary: Posterior inferior direction coming from the top/tongue of shoe
Secondary: Going anteriorly from the posterior portion of the superior timeline of the Orthotic
Secondary: Going superiorly from the inferior surface of the Orthotics applied at the met heads

32

Forces to control DF in AFO

Primary: Superior and anterior applied from the heel of shoe/Orthosis
Secondary: Going post applied at the anterior superior Orthotics band
Secondary: Going inf applied at the met heads from the toe box of the shoe

33

What does a media flange do

Prevents pronation of the foot by controlling IR of the tibia on the talus

34

What does a lateral flange do

Prevents Supination by controlling ER of the tibia on the talus

35

What is the benefit of a hinged AFO

Allows varying degrees of movement at the ankle

36

What is a prerequisite for prescribing a HAFO to a patient

They must demonstrate fair hip and trunk control and emerging control at the knee

37

When prescribe a free ankle joint Orthosis

Pt with polio with intact mm's but compromised hip or knee control

38

When prescribe posterior stop on a AFO

To limit plantar flexion for a pt who can't clear toes in swing phase of gait

39

When prescribe a anterior stop on a AFO

When a person walks with a crouched (Knees flexed gait)

40

When prescribe a spring loaded DF assist Orthosis

DF facilitation needed at initial swing

41

When is a spring loaded AFO contraindicated

With spasticity

42

When to prescribe a spring loaded DF-PF assist AFO

To assist with both DF and PF in gait cycle

43

How to name Orthotics

Identify right or left
Material: Plastic/metal/hybrid
Name: SAFA
Motions controlled and joint
Additional features