X-rays
X-rays allow your dentist to see between and inside your teeth, the tips of your roots and the bones under your gums that are not visible to the naked eye. Used as part of routine examinations to rule out dental disease, X-rays also help your dentist diagnose specific or isolated dental problems.
X-rays are used to check for cavities and assess their extent. And since some X-rays allow you to see the roots of your teeth, they are useful for detecting the presence of cysts, abscesses and other masses according to the Academy of General Dentistry (AGD). In addition, X-rays can identify missing or congenitally affected teeth (such as wisdom teeth) and the extent of bone loss due to disease.