Radiography Intraoral & Extraoral
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22 terms
Terms | Definitions |
|---|---|
 Paralleling Technique | Film is placed parallel to the teeth, central ray is at a right angle to teeth & film. |
| Bisecting-Angle Technique | Film is placed close to teeth, central ray is aimed at imaginary line between teeth & film. |
| Full Mouth Examination | (FMX) Series of intraoral x-rays consisting of periapical & bitewing films, usually 16-20 films (sometimes called a complete series). |
| Vertical Angulation | The movement of the tubehead in an up & down motion. |
| Horizontal Angulation | The movement of the tubhead in a side to side motion. |
| Perpendicular | Forming a right angle. |
| Cone Cutting | A clear (unexposed) area on film that results from improper positioning of the central beam. |
| Foreshortened | Too much vertical angulation, teeth appear much smaller than normal. |
| Elongated | Too little vertical angulation, teeth appear much longer than normal. |
| Herringbone Effect | When film is placed backwards in mouth and exposed. |
| Panoramic Radiograph | Extraoral radiograph showing both the maxilla and mandible in full on one film. |
| Cephalometric | Profile x-ray of the skull, used to measure growth and development. |
| Digital Radiography | Filmless imaging system used to store images on computer. |
| Frankfort Plane | Imaginary plane that passes from the top of the ear canal to the bottom of the eye socket. |
| Intensifying Screen | Increases the effect of the radiation which decreases the amount of radiation needed in an extraoral cassette. |
| Grid | Device used to prevent scatter radiation from affecting the film. |
| Sensor | Small detector that is placed intraorally to capture digital image of teeth. |
| Latent Image | The image on the film after exposure but before developing. |
| Bite-wing | Radiograph that shows the crowns in both arches on 1 film (also known as cavity detecting x-rays) |
| Periapical | Radiograph that shows entire length of teeth plus 3-4mm of supporting tissue. |
| Occlusal | Radiograph that shows a wider view of either the maxilla or the mandible. |
| Focal Trough | Imaginary 3-D horseshoe shaped zone used to focus panoramic radiographs. |
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