Dental x-rays are used to create detailed images of a patient's teeth and mouth. X-rays are often used to monitor tooth growth and development. X-rays reveal tiny pits of decay in the teeth that may not be evident during a visual examination. X-rays can also be used to detect decay under existing fillings or other dental restorations, as well as damage to such restorations and the following:

Abnormalities such as cysts, infections and both benign and malignant tumors
Bone abnormalities associated with diseases
Infection, death of the nerve or other problems associated with the teeth and bones
Injuries to the teeth or jaw (e.g., fractures)
Periodontal (gum) disease                                                                                                                   impacted teeth
Extra teeth

dental x-ray to help prepare and place dental restorations such as crowns, fillings, dental implants, and  dentures.