X-rays are an important diagnostic tool for both doctors and dentists. A dental X-ray can reveal length and location of tooth roots, and can help to locate pockets of infection in the jaw or pinpoint tooth decay between teeth while it is still at an early stage.
Dental X-rays use a very small amount of radiation, but any exposure to radiation above the natural background level should be carefully considered, because all radiation can cause chromosome damage which could potentially lead to cancer. Dental X-rays are considered to be a worthwhile tool because the cancer risk from them is very tiny compared to the potential benefit of improved dental health. Your dentist should always cover your body with a lead shielded apron or blanket. This should include a neckpiece which comes up to cover your thyroid gland, which sits on the front of your larynx.
How often you need dental X-rays depends, in part, on how well you take care of your teeth. If you want to limit the number of X-rays your dentist does, your need to avoid soda and sweets, and brush and floss regularly, paying extra attention to the back teeth.
and what are the future advancement that can be done?