TOPIC: X-RAY FILMS, INTENSIFYING SCREEN AND CASSETTE

🌟 IMPORTANT POINTS TO REMEMBER

🔹Direct action or non-screen film: It is also called wrapped or packet film which is sensitive primarily to X-ray photons.

🔹Indirect action or screen film: It is used in combination with an intensifying screen in a cassette.

🔹Periapical films: Films are available in size 0 (for children), size 1 (for anterior teeth in adults) and size 2 (for posterior teeth in adults).

🔹Occlusal films: These films are larger than periapical films used to take occlusal projections for detection of the lesions.

🔹Bitewing films: These films are used for the detection of proximal caries and alveolar bone loss.

🔹Extraoral films: These are used for taking all extraoral radiographs and used in combination with the intensifying screen.

🔹Duplicating film: These are single emulsion films.

🔹Slow-speed film: This type of film contains the small size of grains of silver halide.

🔹Fast-speed films: These films have larger grain sizes, and a coating of emulsion is present on both sides of the film. Due to this, these films require less exposure time as compared to other films.

🔹Hyperspeed G: This is the 800-speed film that reduces patient exposure.