TOPIC: PRINCIPLE OF RADIOGRAPHIC INTERPRETATION 🌟IMPORTANT POINTS TO REMEMBER 🔹Radiographic interpretation is based on the visualisation and analysis of opacities on a radiograph. 🔹The difference between those X-rays absorbed by the body part and those that penetrate it is known as differential absorption. 🔹The greater the tissue absorption, the fewer X-ray photons reach the film, […]
TOPIC: SPECIALIZED INTRAORAL TECHNIQUES 🌟 IMPORTANT POINTS TO REMEMBER 🔹Mandibular third molar radiography: It can be done by surgical needle holder technique, two-radiograph technique, using film holder and modified X-ray cone position technique. 🔹Gagging is also called retching which refers to the strong involuntary effort to vomit. It can be caused by psychogenic stimuli and tactile […]
TOPIC: NORMAL RADIOGRAPHIC ANATOMY 🌟 IMPORTANT POINTS TO REMEMBER 🔹Enamel: It is the most radiopaque normal structure in human body which consists of 92% of minerals. 🔹Dentine: It is less radiopaque as compared to enamel, which contains 65% of mineral content. The line of demarcation between enamel and dentine is sharp and well-demarcated. In bicuspid […]
TOPIC: UNITS OF MEASUREMENT AND DOSIMETRY 🌟IMPORTANT POINTS TO REMEMBER 🔹Fundamental units: Fundamental units are units which are independent of each other and have their own standard (base). 🔹Derived units: Derived units are units which are not having their own standard (base) and are obtained from fundamental units. 🔹SI unit: In 1960, the new system […]
TOPIC: INFECTION CONTROL IN DENTAL RADIOLOGY 🌟 IMPORTANT POINTS TO REMEMBER 🔸Infections of concern in dental radiography are infective hepatitis, HIV and AIDS, and herpes simplex infection. 🔸Personal protection should be carried out by covering of wound, protective clothing, gloves, mask and eyewear and hand-washing. 🔸Critical surface: This is a surface that penetrates the tissue and […]
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: […]
Enter your email address to receive our Free Newsletter for key Exam and Resource Updates