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Across 2. When determining vertical angulation, if the position-indicating device (PID) is positioned above the occlusal plane and the central ray is directed ___________. , the vertical angulation is termed postitive. 5. With size /1 film, a total of ___ anterior film placements are used in the bisecting technique. 6. To achieve parallelism between the film and the tooth, the ___________ distance must be increased to keep the film parallel with the long axis of the tooth. 8. When vertical posterior bite-wing exposures are indicated, size two film is placed with the long portion of the film in a _________ direction. 9. When the bisecting technique is used, the central ray is directed at 90 degrees to the: 10. All crowns and roots of the first, second, and third molars, including the apices, alveloar crests, contact areas, surrounding bone, and tuberosity region, must be seen on the _______________ radiograph. 11. An unexposed film appears: 12. The central ray of the x-ray beam is directed _________ to the film and the long axis of the tooth regarding the principles of the paralleling technique. 14. For the premolar bite-wing exposure, the front edge of the film should be aligned with the midline of the_____________. 19. Elongation of images results from ____________ vertical angulation. 21. According to the basic principles of the paralleling technique, the film is placed in the mouth_________ to the long axis of the tooth being radiographed. 22. The __________ intraoral radiographic examination is used to examine the entire tooth (crown and root) and supporting bone. 23. _____ is defined as the absence of pathogens, or disease-causing micorogranisms. 24. Elongated images refer to images of the teeth that appear ____ ______.

Down 1. The rule of isometry states that two triangles are equal if they 3. The primary disadvantage of the bisecting technique when contrasted with the paralleling technique is: 4. Which size film is used only for bite-wingsÉ 7. For the premolar bitewing exposure, the PID is positioned far enough forward to cover both maxillary and mandibular. 13. A technique that examines the crowns of both maxillary and mandibular teeth on a single film. 15. Reusable film holders must be __________ after each use. 16. Foreshortening of images results from ________ vertical angulation. 17. With the _________ technique, the vertical angulation is determined by the imaginary bisector; the central ray is directed perpendicular to the imaginary bisector. 18. Foreshortened images refer to images of the teeth that appear _________. 20. A thin radiolucent line appears on the film with a film ____________.