If you are a new patient your dentist will probably suggest having x-rays (unless you have had some taken very recently).
Your teeth may look perfectly health but an x-ray will help the dentist to see whether there is any decay under the enamel, possible infections in the roots as well as any bone loss around your teeth.
X-rays allow the dentist to see between the teeth and under the edges of existing fillings. Any problems can be detected and treated at an early stage.
X-rays are an important part of your health record and must be kept with your personal dental file.