Which cast bears the patellar tendon and is used for tibia fibula with callus formation?

• A. Thumb Spica Cast
• B. Cylinder Cast
• C. Patellar Tendon Bearing Cast
• D. Cylinder Mold

Answer: (C)

The main idea here is weight-bearing cast design for a healing tibia/fibula fracture. A patellar tendon bearing cast is molded so that most of the body's weight is transmitted through the patellar tendon area just below the kneecap. This distributes load away from the fracture site, supports alignment, and allows controlled weight bearing while the callus forms and healing progresses.

The other casts don’t have that specific load-sharing feature: a thumb spica cast protects the hand and wrist, not the leg; a cylinder cast is a general leg cast without the targeted patellar-tendon loading region; a cylinder mold refers to a molding method rather than a specialized weight-bearing design.