Which of the following describes the three types of immobilization orthotics?

• A. Dynamic, static progressive, serial static
• B. Dynamic, static, serial static
• C. Dynamic, static, elastic
• D. Dynamic, serial, progressive

Answer: (A)

Immobilization orthotics are categorized by how they control movement and how they promote ROM gains over time. The three described fit this idea by covering the main approaches to progression while the joint is immobilized: a dynamic device uses elastic components to provide a moving bias, allowing controlled motion while worn; a static progressive device holds the joint in a fixed position but is adjustable to apply a gentle, gradual stretch so ROM can increase without active movement; and serial static devices employ a series of fixed-position orthoses, each worn to a new ROM target before moving to the next stage. This combination—motion with the device (dynamic), adjustable static holds (static progressive), and staged fixed positions (serial static)—captures the three types of immobilization orthotics.