1. . A patient with a large squamous cell carcinoma of the lateral border of the tongue is scheduled for a radical neck dissection. Prophylactic extractions of hopeless teeth must be done to prevent which of the following?ostepradionecrosisPeriodontal diseaseRampant cariesNone of the aboveQuestion 1 of 20 2. dead bone appear on a radiograph assalt and pepper appearancecotton wool appearanceradiolucentradio opaqueQuestion 2 of 20 3. the x ray beam is filtered toremove short wavelength x rayssoften the x rayrestrict the beam sizeremove long wavelength x raysQuestion 3 of 20 4. characteristic 'tram line' calcifications in the skull radiographs is observed insturge weber syndromemaccune albright syndromepaget's diseasecleidocranial dystosesQuestion 4 of 20 5. The radiation generated at the anode of the x-ray tube is calledReverse radiationScattered radiationPotential radiationPrimary radiationQuestion 5 of 20 6. the most common cause of light radiographs isusing low kilovoltageplacing the shielded side of the film toward the tube during exposureover developing the filmsusing an exhausted developerQuestion 6 of 20 7. Hurter Driffield Index is used to measureNiTi instrumentDental cariesStainless steelradiographQuestion 7 of 20 8. What is the role of potassium bromide and benzotriazole in developerActivatorPreservativeInitiatorRestrainerQuestion 8 of 20 9. consistent radiographs requirefixed KVp and mAlong cone technique automatic processingproper developingQuestion 9 of 20 10. Radiographic view for displaced root fragment in maxillary sinus , best view is:Occipitomenton at 30 degreeIOPALateral oblique viewMRIQuestion 10 of 20 11. Foreshorting where the teeth appear too short is caused by:Beam not aimed at the center of the filmToo little vertical angulationIncorrect horizontal angulationToo much vertical angulationQuestion 11 of 20 12. Elongation (the most common error) can be caused byAll of the aboveThe film is not parallel to the long axisThe occlusal plane is not parallel to the floorToo little vertical angulationQuestion 12 of 20 13. Radiotherapy is not used inSquamous cell carcinomaMucoepidermoid carcinomaSpindle cell carcinomaPaget diseaseQuestion 13 of 20 14. sialogram of a normal salivary gland appears asleafless treessialolithiasissialgectasialeafy treesQuestion 14 of 20 15. Which of these structures hinders in imaging the root of maxillary molarsMaxillary sinusOrbital process of zygomapalatine boneZygoma and zygomatic process of maxillaQuestion 15 of 20 16. A periapical image shows overlapped contacts. This error is caused byVertical angulation is insufficientBeam not centered over receptorIncorrect horizontal angulationVertical angulation is excessiveQuestion 16 of 20 17. campbell lines are seen in which radiographic projectionoccipitomentontransorbitaltranscranialtranspharyngealQuestion 17 of 20 18. Which of the following is not a fibrotic effect of radiationVelopharyngeal incompetenceXerostomiaDysphagiaTrismusQuestion 18 of 20 19. First radiographic sign of osteomyelitisBlurring of trabeculaeLoss of vascularitySubperiosteal bone depositionWidening of PDLQuestion 19 of 20 20. The image of the coronoid process of the mandible often appears in periapical x-rays ofThe incisor region of the maxillaThe incisor region of the mandibleThe molar region of the mandibleThe molar region of the maxillaQuestion 20 of 20 Loading...
