Which cast is used for fractures of the radius and ulna with callus formation?

• A. Long Arm Circular Cast
• B. Munster/Fuenster Cast
• C. Short Arm Circular Cast
• D. Abduction Splint/Airplane Cast

Answer: (B)

For fractures of the radius and ulna that are forming callus, the goal is to stabilize the forearm bones while keeping the elbow free to move. The Munster (Münster) cast is designed for this scenario: it immobilizes the forearm to hold the radius and ulna in position during healing, but it leaves the elbow joint unfixed so the elbow can move. This helps prevent elbow stiffness during the healing process and accommodates swelling that often accompanies fracture recovery. The other casts either immobilize the elbow too much (long arm type), don’t sufficiently stabilize the forearm (short arm type), or are intended for different injuries (such as shoulder girdle injuries).