Which of the following materials is commonly used in the construction of orthosis?

The construction of orthoses frequently utilizes plastic materials due to their advantageous properties such as lightweight, moldability, and durability. Plastics can be easily shaped to accommodate the specific contours and functional requirements of the patient's body, providing tailored support and comfort. Additionally, they are resistant to moisture and can withstand various environmental factors, making them suitable for daily wear.

Other materials like wood, rubber, and glass do have their uses in different contexts, but they lack the optimal combination of lightweight flexibility and structural integrity that plastics provide in orthotic applications. Wood, for example, is heavier and less moldable, while glass is not practical due to its fragility and weight. Rubber can be used for cushioning and specific biomechanical applications but does not typically form the structural basis of orthoses. Therefore, plastic remains the preferred choice in the industry for constructing effective and functional orthotic devices.