Principles and techniques of dental radiography

A dental radiography can be performed by various techniques.

Radiography is to produce of X – rays of the and oral structures for the detection of diseases, according to “Dental X – Ray :. Principles and Techniques”. Attendees (those who complete a year of diploma or a two – year associate degree) must be certified to take X – rays in some states. Dental hygienists, who can complete an associate degree or four – year programs for a degree in this field, must be licensed in all states to practice dental hygiene and dental x – rays, according to the Madison NJ Dentist. These professionals must master several techniques to succeed in this field.


Dental radiography can be performed using a traditional film or digital devices. When working with a traditional film, machines intraoral dental X-rays are used to those films placed inside the mouth, while extraoral machines are used for films outside the mouth. Dental radiographs can use a film holder for holding an intraoral film inside the mouth. It can also use a beam alignment device to help position the cone intraoral X-ray machine, also called the position indication device, in relation to the tooth and the film.

When a traditional film is used, X-rays interact with the film layer called the film emulsion containing silver halide crystals absorb radiation. The crystals produce a latent image of a tooth and its surrounding structures, which becomes a visible image once the film is chemically processed. Furthermore, digital radiography involves using an intraoral sensor instead of a film to capture an image of a tooth. Once the X-rays hit the sensor, the electronic charge produced on the sensor is converted into digital form and then the image is visible on a computer. When performing a digital radiography, dental radiographers can still use the traditional X-ray machine dental intraoral.

Film Types

Three types of intraoral film there, periapical, bite-wing, and occlusal. The periapical film is used to view an entire tooth, including the root and the crown of the tooth and the bone supporting the tooth. Meanwhile, the film bite wing is used to view the crowns of the upper and lower teeth in a single film. This type of film is especially important for detecting cavities or other conditions between teeth. Occlusal film is used to examine large areas of the upper or lower jaw.

A panoramic radiograph, which is a type of extraoral film, offers a wide view of the upper and lower jaws in a single film. A cephalometric film, other extraoral film, is used to examine the bone and soft tissues of the face.



Dental radiographers can expose X-ray films using two techniques, parallel technique and technique of bisection. The parallel technique involves placing a film in the mouth intraoral parallel to the longitudinal axis of the tooth, the imaginary line dividing a tooth longitudinally into two equal halves. The central ray of an X-ray beam then is directed perpendicularly to the film and the longitudinal axis of the tooth.

Furthermore, the bisection technique involves placing a film along the surface of the tongue side of a tooth and displays the angle between the film plane and the longitudinal axis of the tooth. The dental technician then you should see the line dividing this angle by half. Then you must direct the perpendicular central ray of an X-ray beam to this line to successfully capture the image of the tooth.

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