Which cast is used for congenital hip dislocation?

• A. Frog Cast
• B. Internal Rotator Board
• C. Night Splint
• D. Shantz Collar Brace

Answer: (A)

In congenital hip dislocation, the goal is to keep the femoral head seated in the acetabulum to allow proper joint development. The frog cast holds the hips in a flexed and abducted position (the legs are spread with the hips bent), which reduces tension from the adductor muscles and creates a stable alignment so the head can stay within the socket. This positioning is essential for maintaining reduction during healing and encouraging the acetabulum to mold around the femoral head as the child grows.

The other options don’t provide that specific flexed-abducted immobilization needed to stabilize a dislocated hip. An internal rotator board focuses on rotational alignment, a night splint is used for conditions affecting the foot or ankle, and a Shantz collar brace serves different indications unrelated to maintaining hip reduction.