What is a key factor when considering materials for an upper extremity orthosis?

When selecting materials for an upper extremity orthosis, the balance between rigidity and flexibility is crucial. This balance is essential because the orthosis must provide adequate support while still allowing for a certain range of motion. A well-designed orthosis helps to stabilize and protect the affected area without compromising the patient's ability to perform necessary movements.

Rigid materials can offer substantial support, especially in cases of severe injury or instability, while flexible materials are important for allowing mobility and comfort during activities of daily living. The ideal material should prevent excessive movement that could worsen the condition while still enabling functional tasks, thereby promoting healing and recovery. Achieving the right combination ensures that the orthosis serves its primary purpose effectively, contributing to the overall success of the treatment plan.

While cost, aesthetic appeal, and weight of the materials are also important considerations in the overall selection process, they do not directly address the critical functional requirement of providing both support and mobility, which is the main focus when creating an orthosis for upper extremity use.