The Thumb Spica Fracture Brace (TSFB) is designed to replace fiberglass and plaster casting and provide rigid immobilization to the forearm, wrist and thumb. It provides stability and support for injuries to the first metacarpal-phalangeal (MCP) joint, the first carpo-metacarpal (CMC) joint, and the wrist joint. The TSFB is indicated for all injuries to the thumb, such as Bennett's or complex Rolando's fractures, suspected or confirmed navicular (scaphoid) fractures, and for other carpal bone injuries. The thumb extension, which completely immobilizes the first digit can be trimmed to any length to allow varied thumb flexion. The TSFB is also indicated for fractures to the distal radius or distal ulna, Colles fractures, Salter-Harris pediatric wrist and forearm injuries. It can be employed for acute injuries as well as post-operatively.