What structures are seen on a bitewing radiograph? Show Only crowns, some alveolar bone, and small portion of the root What type of image shows the upper and lower teeth and occlusion? What does an intraoral full-mouth survey (FMX) contain? Periapical images What can be detected on a bitewing radiograph? Interproximal decay What structures are seen on a periapical radiograph? Entire tooth from occlusal surface or incisal edge to about 2 to 3 mm beyond the apex (to show periapical bone) What can be diagnosed on a periapical radiographs? Pathological conditions of the tooth, roots, and bone For the average adult, a full mouth series consists of how many images? What region is where the number of images varies for the full mouth survey? What are the two basic techniques for obtaining periapical images? Paralleling technique Which imaging technique is recommended by The American Academy of Oral and Maxillofacial Radiology and the American Association of Dental Schools? Why is the paralleling technique recommended? It provides the most accurate image with the least amount of radiation exposure to the patient What are 3 situations in which the bisecting technique might be used? Shallow mouth What are the five basic rules for the paralleling technique? Placement What rule is to place the image receptor so that it will cover the correct teeth to be examined? Image receptor placement (paralleling technique) What rule is that the image receptor must be positioned parallel to the long axis of the tooth? Image receptor position (Paralleling technique) The image receptor, in the appropriate holder, must be placed how? Away from the teeth and tour the middle of the mouth What rule is the central ray of the x-ray beam must be directed perpendicular to the image receptor and the long axis of the tooth? Vertical angulation (paralleling technique) What rule is the central ray of the x-ray beam must pass through the contact areas between the teeth? Horizontal angulation (Paralleling technique) What rule is the x-ray beam must be centered on the image receptor to ensure that all areas are exposed? Central ray (paralleling technique) What is the ideal exposure sequence? Start with the anterior teeth With film placement, which side of the film will face the teeth? White side Which films are placed vertically with x-ray film? Which films are placed horizontally with x-ray film? Where is that identification dot on the film placed for an x-ray film? Placed in the slot of the film holder What technique is based on a Geometric principal of equally dividing a triangle? Bisecting (bisection of the angle) What is the major disadvantage of the bisecting technique? The image is dimensionally distorted What practice is not recommended when using a bisecting technique? Asking patients to hold film with fingers to stabilize the film in the mouth Why do we not ask patients to hold the film to stabilize it? Exposes the patiences hand and finger to a unnecessary radiation Which anatomical landmark is used for incisors? Which anatomical landmark is used for the canines? Which anatomical landmarks is used for premolars? Which anatomical landmark is used for molars? What vertical angulation is used with the paralleling technique? The central ray is directed perpendicular to the image receptor and the long axis of the tooth What vertical angulation is used with the bisecting technique? The center ray is directed perpendicular to the imaginary bisector What vertical angulation is used with the bitewing technique? The central ray is directed at a +10 degrees to the occlusal plane What way is the PID pointing with positive vertical angulation? What way is the PID pointing with the negative vertical angulation? What causes foreshortened radiographic images? Results from excessive (too much) vertical angulation What causes elongated radiographic images? A result from insufficient (not enough) vertical angulation How far beyond occlusal or incisal edge should the image receptor extend? By about 1/8 inch (2-3 mm) What size image receptor is used for the bisecting technique? #2 What technique is used to examine large areas of the upper or lower jaw? What film size is used with the occlusal technique? Size # 4 for adults Which radiographing mounting method is recommended by the ADA? In the labial mounting method, the films are placed how? With the raised dots facing up (convex) In the labial mounting method, how are the radiographs viewed? As if the viewer is looking directly at the patient In the lingual mounting method, the films are placed how? With the raised dots facing down (concave) In the lingual mounting method, how are the radiographs viewed? As if the viewer is inside the patient's mouth and is looking out Who are patients without teeth? What must be reduced because of the smaller size of a pediatric patient? Exposure factors: mA, kVp, time What size film is used for the primary dentition? What size film is used for a mixed dentition? When exposing a radiographic image on an endodontic patient, how much bone should be visible beyond the apex of the tooth? At least 2 mm What film holder can be used to aid in position in the film during a portion of the root canal procedure? If a patient senses nervousness, what may result and cause a gag reflex? Which field placement is most likely to cause a gag reflex? Maxillary molar film placement What are diagnostic quality radiographs? Properly placed, exposed, and processed What are the characteristics of x-rays? Which x-ray beam factors influence density in the radiographic image? Which x-ray beam factor influences contrast? What is the purpose of the PID? Which type of PID reduces radiation exposure the most? What is the purpose of the aluminum filter? To remove the low energy, long wavelength, and least penetrating x-rays from the x-ray beam What is the purpose of the lead collimator? To restrict the size and shape of the x-ray beam In the x-ray tube, what is the source of electrons? Tungsten filament in the cathode Where are x-rays produced? What are four critical organs that are sensitive to dental radiation? Skin What is an intraoral technique of exposing periapical images in which the teeth and image receptor are parallel to each other? What is an intro oral technique of exposing periapical images in which the film in the teeth create an angle that is bisected by the beam? Bisection of the angle technique Dental images with the proper landmarks and optimum density, contrast, definition, and detail have good what? What is used to describe a space between two adjacent services? What is a type of image used for the interproximal examination? What is the bone that supports and encases the roots of the teeth? What is the coronal portion of alveolar bone found between teeth? What is an area of a tooth that touches in adjacent tooth a the same arch? An object is what if it is moving or lying in the same plane and is always seperated by the same distance? What means to cut across or through? What is something that intersects or forms a right angle? A 90° angle formed by two lines perpendicular to each other is what? What is an imaginary line that divides the tooth longitudinally into two equal halves? What is the central portion of the primary beam of radiation? What technique is used for exposing dental images? Parallel and bisecting angle Why is an exposure sequence important? So areas of the mouth are not missed or retaken When you're exposing images, in which area of the mouth should you begin? Which exposure should be the first for the posterior regions? Why's it not recommended to have the patient hold the image receptor during exposure? The patient receives unnecessary radiation What kind of film holder can be used in the bisecting angle technique? What error occurs when the horizontal angulation is incorrect? What can occur when the vertical angulation is incorrect? Elongation In the bisecting angle technique, how is the image receptor placed in relation to the teeth? What is the purpose of bitewing images? To view the interproximal surfaces What vertical angulation should be used for bitewing images? What film size is used in the occlusal technique for an adult? When are occlusal radiographs indicated? To show a wide view of the arch For partially edentulous patients, how can you modify the technique for using a bite block? When you're exposing films for a pediatric patient, what analogy can use to describe the tube head? What changes must be made in the exposure factors when dental images from a pediatric patient are exposed? Exposure factors must be reduced What film size is recommended for a pediatric patient with all primary dentition? Where would you begin making exposures for a patient with a severe gag reflex? What is a good diagnostic quality image for endodontics? One that allows you to see 5 mm beyond the apex Why is it important for the dental assistant to recognize normal anatomic landmarks? For mounting of x-ray films Why is it important to avoid retakes? To avoid unnecessary radiation exposure What technique is recommended for the most accurate image with the least radiation?Paralleling technique provides less image distortion, and reduces excess radiation to the patient.
What technique is used for exposing radiographs?Answer and Explanation: The technique used for exposing dental images is done as a parallel or bisecting angle image. A parallel technique is when a film is placed parallel to the teeth and the x-ray is positioned perpendicular to the teeth.
What is bisecting technique?The bisecting angle technique is accomplished by placing the receptor as close to the tooth as possible. The central ray of the x-ray beam should be directed perpendicular to an imaginary line that bisects or divides the angle formed by the long axis of the tooth and the plane of the image receptor.
What are the basic rules of the bitewing technique?State the basic rules of the bite-wing technique. -Horizontal angulation: when a bite-wing tab is used, the central ray of x-ray beam must be directed to the contact areas between teeth. -Receptor expose: the x-ray beam must be centered on the receptor to ensure that all areas of the receptor are exposed.
|
What technique provides the most accurate image with the least amount of radiation exposure?
zusammenhängende Posts
Urheberrechte © © 2024 nguoilontuoi Inc.
