Root resorption most commonly occurs in your twenties and is more common in women. The typical causes of teeth roots dissolving away during adulthood include: Tooth impaction Teeth grinding Infection in the tooth nerve Infection in the gums Orthodontic treatment However, sometimes teeth roots can become resorbed for unknown reasons. Treatment options will vary depending on your situation, so you should schedule an appointment with your dentist to find out what will work best for you. For more information on root resorption, read our blog article "Root Resorption & Short Teeth Roots."