Arch Supports Flashcards
Wedging to the medial border of the arch support type of foot orthosis will provide additional?
Valgus stability
Additional varus stability may be achieved with an arch support type of orthosis by?
Wedging the lateral border
Forefoot supination may be achieved with An arch support type of foot orthosis by?
Posting (wedging) under the first metatarsal
Posting wedging under the 5th metatarsal heads of an arch support will
Pronate the forefoot
The component used to elevate the second, third, and fourth metatarsal heads in an arch support type of foot orthosis is called?
Metatarsal pad
Corrective floor reaction forces applied by an arch support type of orthosis during walking could be affected by?
The quality of fit of the shoe the patient is wearing
In selecting the footwear to be used with an arch support type of orthosis, the major factor to consider is?
That the shoe must provide a stable base of support.
An arch support type of foot orthosis provides stability of
longitudinal and transverse arches of the foot
The longitudinal arch can be raised by?
Adducting the forefoot
The longitudinal arch can be lowered by
Abducting the forefoot
The distal anterior edge of an arch support is often trimmed proximal to the metatarsal heads if the orthosis is only supporting the
Longitudinal arch
If relief is needed at the metatarsal heads, the distal anterior trim must
Extend distal to the metatarsal head
Taking an impression of the foot for an arch support should be done with the patient
Partial weight bearing and corrective forced applied
The use of elastic plaster bandage while taking an impression for a foot orthosis
Is recommended as the first wrap
Typically, footboards are classified according to
Heel heights
When taking an impression for an arch support type of foot orthosis while non-weight bearing, the hind foot and forefoot are
Held in neutral
A non plaster bandage impression of a foot can be taken by
Using a foam box impression
Areas of sensitivity on a foot should be marked while taking an impression do that?
The location of the areas of sensitivity transfer to the inside of the impression.
When applying corrective forces to the foot for which an impression is being taken, the orthotist must maintain the ankle and forefoot correction
Until the plaster bandage sets
During the impression process for an arch support, the longitudinal arch can be raised by
Both adducting the forefoot and externally rotating the tibia
During the impression process for an arch support, the longitudinal, arch can be lowered by?
Both abducting the forefoot and internally rotating the tibia
The marking of bony prominences and landmarks of the foot prior to the impression process should include the
Navicular, base of the fifth metatarsal, and the distal trim line
Sometimes, material is removed from the area of the arch on a cast of the foot in order to
Provide additional valgus stability
Forefoot pronAtion can be achieved with an arch support type of foot orthosis by
Posting (wedging) under the 1st metatarsal
Forefoot supination can be achieved with an arch support type of foot orthosis by
Posting (wedging) under the 1st metatarsal
Removing plaster from the cast in the area just proximal to the metatarsal heads will
Elevate those met heads
To relieve a bony prominence in an arch support, the cast should be
Built up 3mm in that area
To increase the amount of medial support of an arch support, plaster should be
Removed in the area of the longitudinal arch
An arch support is best evaluated on the patients foot
Prior to, during, and after ambulation
Corrections should be made to an arch support if skin redness persists for more than
15 minutes
Pressure on the metatarsal heads can be relieved by incorporating a metatarsal pad
Proximal to the metatarsal heads
All bony prominences on a patients foot must be free from
Signs of excessive pressure
During walking with an arch support, the patients heel should
Not slip(piston) causing irritation
Under weight bearing, the foot orthosis must apply sufficient forced to
Stabilize the deformity and be comfortable
If the patients skin shows areas of excessive pressure
The orthosis should be reformed in that area
If the foot orthosis is to be stable in the shoe
The heel and forefoot must be flat and parallel
Before fitting a foot orthosis to a patient
All edges should be rounded and smooth
When the foot orthosis does not extend to the distal (anterior) tips of the toes, the distal anterior edge must
Be tapered to provide a thin comfortable surface
The advantage of fabricating the foot orthosis from a thermoplastic material is
It can be easily reshaped
The main disadvantage of using a foam box impression of patients foot is
Difficulty in holding corrective forces
One technique for treating a heel spur with a foot orthosis is
To place rigid material around the spur and soft material under the spur
By placing a rubber, tear shaped metatarsal pad on the plantar surface of the foot prior to wrapping with plaster bandage
Cast modifications for elevating the metatarsal heads is minimized
Which of the following is generally true?
Accommodate rigid deformities and correct flexible deformities
Which of the following motions and deformities are related?
Pronation, valgus, eversion
Generally, the trim line with respect to the navicular bony prominence should be?
Proximal or distal to Alex of navicular
To evaluate a foot orthosis for impingement on the distal margins of the malleoli
Invert and evert the subtalar joint.
For an arch support type of foot orthosis to be successful, it must
Intimately fit the plantar surface of the foot
