X-rays are one of the most useful and widespread tools in the field of medical science, as they provide important information for both initial diagnosis and planning and evaluation. In case of pregnancy, dental X-ray should be avoided, except in exceptional cases where it becomes necessary. To maximize the benefits and minimize the negative health effects of radiation, basic principles and rules of radiation protection have been established that determine the use of radiation.

In Greece, the body responsible for the radiation protection of the population, workers and the environment is the Hellenic Atomic Energy Commission (EEAE). The current Radiation Protection Regulations (Government Gazette 216, B, 6/3/2001) form the basis of the radiation protection system in the country. These describe the obligations of all professionals dealing with radiation, ensuring their safe use and the least possible radiation exposure. These regulations are fully compatible with the international and European regulatory framework.

Are X-rays dangerous to humans?

No. The radiation used in dental x-rays is a very low dose intended for diagnostic purposes. High doses of radiation are used in medicine, mainly in radiotherapy, for the treatment of cancerous tumors, where the aim is the targeted destruction of cancer cells.

How often is it safe to have dental x-rays?

There is no specific limit for the frequency of dental x-rays, but the frequency depends on the dentist’s judgment. Dental X-rays are only taken when the dentist determines they are necessary to diagnose the patient’s problem, and according to the person’s medical and dental history.

Should children have x-rays less frequently?

There is no specific time frame for repeat x-rays in children. The dentist will assess the need based on the child’s oral health and specific circumstances. It is recommended to discuss any concerns with the dentist and agree on diagnostic tests.

What is the difference between digital x-rays? Is it true that they do not produce any X-radiation?

Both types of x-rays use X-rays, but the dose is significantly reduced in digital x-rays, up to 90% compared to conventional systems. The advantages of digital radiographs include immediate display and the possibility of further processing of the image, as well as the possibility of electronic sending (via e-mail) and archiving.

Do you know how much radiation we receive from our environment?

The radiation dose we receive from x-rays is very small compared to other sources of radiation in the environment.

Every day, we are exposed to X-radiation from various sources, including radon, air travel, and cosmic radiation. The radiation doses for some X-rays are approximately:

– Retrolobular X-ray = 0.25 µSv
– Cephalometric x-ray = 5 µSv
– Panoramic X-ray = 10 µSv
– Dental computed tomography = 84-212 µSv
– Chest x-ray = 40 µSv
– Chest X-ray = 9000 µSv
– Environment (during one year) = 4500 µSv

The microsievert (μSv) is a unit of measurement for radiation dose and is equal to one millionth of ordinary sieverts.
Overall, X-rays make up a small percentage of the total radiation we receive every day.

After an x-ray is performed, is there radiation left in the room?

No, X-rays are produced during the scan, which takes just a few seconds. The percentage that is not absorbed by the imaging system is absorbed by the materials surrounding the space. This is similar to the production of light by an ordinary light bulb: when the circuit is broken, no more light is produced.

Do materials that receive radiation from the lamp become radioactive?

No, neither the irradiated materials nor the lamp can be activated and become radioactive. The energy required to activate materials is hundreds of times greater than what an x-ray machine can produce.

Which means of radiation protection should be used in dental offices?

In dental offices, radiation protection collars and aprons are essential, and must be used by children under 16 (collar) and by pregnant women (apron and collar). Although the use of this equipment by dentists is not mandatory, it is recommended that they are optimally protected during x-rays, as they perform many non-dental x-rays every day. Alternatively, it is recommended that they move away from the x-ray area, which is shielded by the wall material and its permeability to radiation. Plastered brick-brick walls almost neutralize X-ray intensity, and lead (Pb) is the most effective shielding material.

According to the Radiation Protection Regulations that apply to practices that use ionizing radiation, a special operating license is required.


Periapical X-ray shows the entire tooth, from the molar to the tip of the root. This type of X-ray is useful for the dentist as it allows them to identify problems such as tooth decay, gum disease, bone loss and other abnormalities that may be present in the tooth, or periodontium, the periodontal tissue and surrounding bone.

• Implants: Assessment of maxillary and mandibular bone height for implant placement.
• The specialized procedure for locating and determining the exact location of impacted and supernumerary canines involves tracing their relationship to adjacent teeth and anatomic structures such as the incisor, sinus cavity, and inferior alveolar nerve canal. In addition, it includes the investigation of root fractures, cysts, tumors, clefts and maxillofacial abnormalities through clinical examination and other radiographic examinations. In addition, it focuses on apical lesions that are not recognized on the panoramic radiograph. The endodontic technique is an important tool for diagnosing the number and position of the roots of a tooth, with the aim of effective treatment.
• Periodontics: The level of the bone in relation to the teeth is assessed.
• Endodontics (denervation): The periodontal and endodontic condition of the tooth and the number of roots are evaluated. Possible changes in the bone that are not visible to the naked eye are observed. The use of local digital radiographs is essential for the initiation, middle and completion of denervation.

• The radiation sources and equipment operate in the clinic:

NewLifeEvolution-X 3000 Dental X-ray.

Registration Certificate A.P.:A/441/14189/2020/06.11.2020