When it comes to determining how often to change your orthotics, there are many factors to take into consideration. The first is the material that the devices are made from. Some orthotics are fabricated from a firm plastic material that’s very durable. Because this material is durable and wears very little, the device generally last four to five years. Other materials, such as cork, leather, and foams are softer materials and will deform over time thus having a much shorter lifespan. The lifespan of these materials ranges from one to three years, depending on how it is constructed and your activity level.
The types of activities you’re involved in are also key factors in the lifespan of your orthotics. A marathon runner is much harder on their feet than a weekend warrior and will require a more frequent change of orthotics. Our feet are dynamic and must change with every step and manage forces. This constant change will cause the foot to change with time and those who are more active, such as a marathon runner will notice quicker and more dramatic changes. This will require a change in orthotics sooner, due to the change in mechanics.
Another key factor involved in determining when your orthotics should be replaced is surgeries. A major joint replacement, such as a knee, hip, foot reconstruction and some back surgeries, will alter the mechanics of the lower extremity significantly enough to warrant a new pair of orthotics. Pregnancies can also cause changes in your feet and mechanics especially if it’s your first pregnancy. This will occasionally require a reevaluation for new orthotics.
There are a lot of factors to consider when determining when to change your orthotics. It’s best to see your podiatrist once a year to have your orthotics evaluated, and if you experience pain while wearing your orthotics you should see them sooner.