How do temperature and humidity affect orthotic materials?

Temperature and humidity play significant roles in how orthotic materials behave, making the alteration of stiffness and comfort a critical consideration for orthotic fitters. Many materials used in orthotic devices, such as thermoplastics, are sensitive to temperature changes. When exposed to higher temperatures, these materials can become softer and more malleable, allowing for better adjustments to fit a patient's anatomy. Conversely, lower temperatures can cause the materials to harden, which may reduce their ability to conform to the user's body shape, thus affecting overall comfort and efficacy.

Humidity also influences these materials. High levels can cause certain polymers to absorb moisture, which can change their mechanical properties, potentially leading to decreased performance or comfort. A correctly fitted orthotic device should take these environmental factors into account to ensure that it maintains flexibility and support under varying conditions. Therefore, recognizing how temperature and humidity impact stiffness and comfort is essential for providing effective orthotic care and improving patient outcomes.