| Question |
Answer |
| 1. List all components of exposure technique. |
film position, alignment of vertical and horizontal angle and centering beam |
| 2. What is considered the apical area for diagnostic purposes? |
apex plus 3 - 4 mm of surrounding bone |
| 3. What is the term for having to redo the radiograph? |
retake or remake |
| 4. Which technique error causes overlapping of contacts? |
incorrect horizontal angle |
| 5. Which technique error causes foreshortening of the image on a radiograph? |
too much vertical angle |
| 6. Which technique error causes elongation of the image on a radiograph? |
too little vertical angle |
| 7. Which technique error causes a cone cut on the radiograph? |
beam not centered with film |
| 8. What can cause a film image to be light? |
too little exposure (time or mA or kVp or a combination), too little development, cold chemicals |
| 9. What can cause a film image to be dark? |
too much exposure (time or mA or kVp or a combination), too much development, hot chemicals |
| 10. What will be the result on the radiograph if the film was placed backwards in the mouth? |
light image with faint detail of lead foil embossed pattern |
| 11. What is the most likely cause for a dark, slightly curved mark on the radiograph? |
fingernail pressure |
| 12. What is the appearance of a radiograph that has been contaminated with fixer prior to processing? |
white blotches |
| 13. If the film has been handled with fingers contaminated with fluoride gel prior to processing, what will be the result on the radiograph? |
dark spots or dark fingerprint image |
| 14. What could cause a crimping artifact? |
hemostat pressure marks |
| 15. List all of the factors influencing film density. |
mA, kVp, exposure time, PID length, film speed, tissue density, processing technique |
| 16. What is the correction for a foreshortened image? |
decrease the vertical angle |
| 17. What is the correction for an elongated image? |
increase the vertical angle |
| 18. What is the correction for overlapping of contacts? |
redirect the horizontal angle throught the contact |
| 19. Which teeth should be present on a premolar periapical radiograph? |
distal of canine (1/3 to 1/2); premolars - usually the first molar is also included, but not required |
| 20. Which teeth should be present on a molar periapical radiograph? |
third molar area and second molar; first molar (may not show the mesial of first molar) |
| 21. The distal of the canine is missing from a premolar periapical. If the canine is present in the mouth and can be seen on the bitewing, is this an error? |
yes - it is a film placement error |
| 22. The third molars have been extracted. Do the third molar areas need to be present on the molar periapicals? |
yes - 3rd molar areas need to present on all molar radiographs |
| 23. How much bone structure must surround the apex of the tooth for a diagnostically acceptable radiograph? |
3 - 4 mm |
MedTemCP5 Word+Pics
