X-rays also can show the exact location of impacted and unerupted teeth. They can pinpoint the location of cavities and other signs of disease that may not be possible to detect through a visual examination. Your radiographic schedule is based on your dentist's assessment of your individual needs, including whether you're a new patient or a follow-up patient, adult or child. In most cases, new patients require a full set of mouth X-rays to evaluate oral health status, including anyunderlying signs of gum disease, and for future comparison. Follow-up patients may require X-rays to monitor their gum condition or the presence of tooth decay.