Which of the following best describes a static progressive orthotic?

• A. Base, outrigger, static components for force application (fishing line, strap, etc)
• B. A hinged device that allows movement
• C. A dynamic orthosis with elastic straps
• D. A rigid cast applied to immobilize completely

Answer: (A)

A static progressive orthosis works by applying a fixed, gradual stretch to a joint using a solid base with an outrigger and nonelastic components (like fishing line or straps) to pull at a set angle. The joint stays in a held position during use, and the tension can be adjusted over time to increase range as tissues loosen. This distinguishes it from hinged devices that allow movement, and from dynamic orthoses that rely on elastic components to create ongoing movement or resistance. It’s also not just a rigid cast, which would immobilize the joint completely.