In Angles classification, what class has a molar relationship where the buccal groove of the mandibular first permanent molar is mesial To the Mesiobuccal cusp of the maxillary first permanent molar by at least the width of a premolar? A. Class I B. Class II division I C. Class II division II D. Class III - ✔✔D. Class III Malocclusion occurs in all of the following except one. Which one is the exception? A. Open bite B. Midline shift C. Dental crowding D. Crossbite - ✔✔C. Dental crowding A blood pressure reading of 138/83 is classified as: A. normal B. elevated C. Stage I hypertension D. Stage II hypertension - ✔✔C. Stage I hypertension prophylactic antibiotic pre-medication is given to all of the following except one. Which one is the exception? A. Mitral valve prolapse B. artificial heart valve C. history of infective endocarditis D. Cardiac transplant - ✔✔A. Mitral valve prolapse Rubber cup polishing is contraindicated in patients with all of the following except one. Which one is the exception? A. Xerostomia B. Newly erupted teeth C. Mild gingivitis D. Exposed roots surfaces - ✔✔B. Newly erupted teeth Nitrous oxide tanks are A. Blue B. Green C. White D. Black - ✔✔A. blue Which of the following tooth stains is NOT caused by poor oral hygiene? A. Green B. Orange C. Brown D. Black like stain - ✔✔D. Black line stain The opaque structure surrounding a tooth's root is: A. Lamina dura B. Periodontal ligament C. dentinal tubules D. enamel pearls - ✔✔A. Lamina dura The amount of radiation an occupationally exposed person may receive in one week is: A. 50mSv B. 1 mSv C. 5 mSv D. 10 mSv - ✔✔B. 1 mSv Which anatomic landmark could be viewed on a periapical image of the maxillary molars? A. Zygomatic process B. Inverted "Y" C. Inverted nasal conchae D. Hamulus - ✔✔C. Inverted nasal conchae The molybdenum cup is found at which electrode inside the tube head? A. Positive anode B. Positive cathode C. Negative anode D. Negative cathode - ✔✔D. Negative cathode Which of the following results in a decrease in the number of photons? A. Milli amperage increased B. Exposure time increased C. Kilovoltage peak increased D. Aluminum filter increased - ✔✔D. Aluminum filter increased A patient takes medication b.i.d. p.o. What is the meaning of this abbreviation? A. 3 times a day, following meals B. As needed, at bedtime C. Every 3 hours - ✔✔(Their answer was wrong) Which physiotherapy aid is the best choice for a patient with exposed roots surfaces? A. Wedge stimulator B. Tufted floss C. Floss threaded D. Oral irrigator - ✔✔A. Wedge stimulator Each of the following is true for steam sterilization except one. Which one is the exception? A. Corrodes carbon steel B. is acceptable for some plastics, cotton roll, and gauze C. spore test is bacillus atrophaes D.dulls instruments - ✔✔C. spore test is bacillus atrophaes Air polishing can be completed for each of the following procedures except one. Which one is the exception? A. remove stain B. detoxify roots C. prepare tooth for sealants D. Clean composite restorations - ✔✔D. Clean composite restorations Each of the following is a case of endogenous staining except one. Which one is the exception? A.pulpal necrosis B. Chlorhexidine C. tetracycline ingested during tooth eruption D. Internal resorption - ✔✔B. Chlorhexidine Which area specific gracy curet debrides the mesial, facial, and lingual surfaces of posterior teeth A. 7/8 B. 11/12 C. 13/14 D. 17/18 - ✔✔B. 11/12