There are several types of root resorption that may affect teeth. One aggressive form is called invasive cervical resorption (ICR) and is usually found on radiographic examination by your dentist. Patients commonly do not experience symptoms until very late stages of the disease when treatment options become much more difficult. Treatment usually involves both root canal therapy and a surgical procedure to remove the resorptive lesion and may be able to retain your natural tooth. Endodontists have surgical operating microscopes to help treat this disease and should be consulted for treatment options if resorption is found.