TOPIC: BASICS OF X-RAY 🌟 IMPORTANT POINTS TO REMEMBER 🔹Hard rays: X-rays having shorter wavelengths have great penetrating power and are called hard rays. 🔹Soft rays: X-rays having longer wavelengths possess less energy and less penetrating power. These are called Grenz rays. 🔹Thermionic emission: It can be defined as the phenomenon of emission of electrons […]
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 […]
TOPIC: PRINCIPLE OF PROJECTION 🌟 IMPORTANT POINTS TO REMEMBER 🔹Image sharpness: It is the degree with which how well a boundary between two differing radiodensities is delineated. 🔹Image resolution: It is the degree with which how well a radiograph records separate objects that are close together.
IMAGE CHARACTERISTICS 🌟IMPORTANT POINTS TO REMEMBER 🔹Density: It is also called photographic density. It is the term used for describing the degree of film blackening and is measured by densitometer. In diagnostic radiology, the range of optical density is 0.3–2. 🔹Radiolucent areas: The white areas on the radiographic film🔹Radiopaque areas: The black areas on the […]
TOPIC: OCCLUSAL RADIOGRAPHY 🌟 IMPORTANT POINTS TO REMEMBER 🔹It is also called as called ‘sandwich radiography’. Occlusal radiographs are made using an extreme bisecting angle technique in which the primary beam is directed perpendicular to the imaginary bisector of angle formed between long axis of the tooth and long axis of the film. 🔹Mandibular cross-sectional view: […]
TOPIC: PATIENT MANAGEMENT IN DENTAL RADIOLOGY 🌟 IMPORTANT POINTS TO REMEMBER 🔺Dental radiographers must understand the importance of dental radiographs and their use in the management of the patients. 🔺He or she can be a dental assistant, dental hygienist or dental auxiliary. 🔺Proper dental radiograph is helpful to the dentist for detecting the pathology […]
TOPIC: BITEWING RADIOGRAPHY 🌟IMPORTANT POINTS TO REMEMBER 🔹Position of bite: The tab or bite platform should be positioned in the middle of the film packet and parallel to the upper and lower edges of the film packet. 🔹Position of film packet: The film packet should be positioned with its long axis horizontally for horizontal bitewing […]
PARALLEL LINE ANGLE TECHNIQUE 🌟 IMPORTANT POINTS TO REMEMBER 🔹Parallel line angle technique is also called Fitzgerald technique, long cone technique and extended cone technique. 🔹The central ray of the X-ray beam should be perpendicular to the film and the long axis of the tooth. The film should be placed in the mouth parallel to […]
TOPIC: BISECTING LINE ANGLE TECHNIQUE 🌟 IMPORTANT POINTS TO REMEMBER 🔹Bisecting line angle technique is also called short cone technique. 🔹Cieszynski rule: This rule states that two triangles are equal when they share one common side and have two equal angles. The central ray of the X-ray beam and the imaginary bisector result in formation […]
INTRAORAL RADIOGRAPHY: GENERAL CONSIDERATIONS 🌟 IMPORTANT POINTS TO REMEMBER 🔹Types of intraoral radiography: Periapical Radiography, Bitewing Radiography, Occlusal Radiography 🔹Head position: The chair should be raised high enough so that the occlusal surfaces of the maxillary arch can be visible while taking maxillary views. 🔹Occlusal plane: This should be parallel to the floor.
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