DPM Orthotic Device Prescription 2

Question 1

Which posting technique in a root neutral cast orthosis corrects for a forefoot varus deformity?

Accepted Answer

Forefoot varus intrinsic post

Answer

A forefoot varus intrinsic post is used to accommodate or correct a forefoot varus deformity by raising the medial forefoot.

Question 2

A patient presents with a cavus foot and lateral ankle instability. Which orthotic modification best addresses both issues?

Accepted Answer

Lateral heel skive with lateral flange

Answer

A lateral heel skive shifts the subtalar joint axis medially, reducing supination, while a lateral flange provides lateral ankle support.

Question 3

What is the primary purpose of a metatarsal bar placed proximal to the metatarsal heads on an orthotic device?

Accepted Answer

Offload pressure from the metatarsal heads

Answer

A metatarsal bar redistributes plantar pressure proximally, relieving pressure at the metatarsal heads.

Question 4

In Root biomechanical theory, which condition is described as the subtalar joint being inverted from its neutral position when the forefoot is perpendicular to the bisection of the calcaneus?

Accepted Answer

Forefoot varus

Answer

Forefoot varus is defined as an inverted forefoot relative to the rearfoot when the subtalar joint is in neutral position.

Question 5

A dancer with a flexible flatfoot needs an orthosis that allows toe-off freedom. Which shell material is most appropriate?

Accepted Answer

3mm Subortholen

Answer

Subortholen (polypropylene variant) in thinner gauges provides adequate control while remaining flexible enough for dynamic dance movements.

(DPM) Doctor of Podiatric Medicine Practice Test

(DPM) Doctor of Podiatric Medicine Practice Test

DPM Orthotic Device Prescription 2