OCC Casting Materials & Techniques 4

Question 1

Which layer is applied FIRST when constructing a traditional cast?

Accepted Answer

Stockinette

Answer

Stockinette is applied first directly over the skin, followed by cast padding, and then the casting material (plaster or fiberglass).

Question 2

What is the approximate full weight-bearing time after application of a standard plaster long leg cast for a stable fracture?

Accepted Answer

At 48–72 hours once the cast is fully dry

Answer

Plaster reaches adequate strength for limited weight-bearing within 24–48 hours as it fully dries and crystallizes, though physician guidance determines timing.

Question 3

Which of the following is TRUE regarding cast padding application?

Accepted Answer

Each successive layer should overlap the previous by 25–50%

Answer

Cast padding is applied in overlapping layers of 25–50% to ensure uniform thickness and prevent gaps that could cause pressure points.

Question 4

A sugar-tong splint for a distal radius fracture controls which primary motion?

Accepted Answer

Forearm pronation and supination

Answer

The sugar-tong splint wraps around the elbow in a U-shape, effectively controlling forearm pronation and supination while allowing some elbow flexion.

Question 5

What is the minimum recommended number of plaster layers for a walking cast intended to bear body weight?

Accepted Answer

6–8 layers

Answer

Weight-bearing plaster casts typically require 6–8 layers (more over stress areas) to provide adequate structural strength for ambulation.

(OCC) Orthopedic Casting Certification Practice Test

(OCC) Orthopedic Casting Certification Practice Test

OCC Casting Materials & Techniques 4