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1000 MCQ Bank Questions | Dental Anatomy | Human Tooth

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1 1. For lower premolars, the purpose of inclining the handpiece lingually is to A. B. C. D. Avoid buccal pulp horn Avoid lingual pulp horn Remove unsupported enamel Conserve lingual dentine 2. For an amalgam Restoration of weakened cusp you should A. B. C. Reduce cusp by 2mm on a flat base for more resistance Reduce cusp by 2mm following the outline of the cusp Reduce 2mm for retention form 3. Before filling a class V abrasion cavity with GIC you should A. B. C. Clean with pumice, rubber cup,
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   1 1. For lower premolars, the purpose of inclining the handpiecelingually is to A. Avoid buccal pulp hornB. Avoid lingual pulp hornC. Remove unsupported enamelD. Conserve lingual dentine 2. For an amalgam Restoration of weakened cusp you should A. Reduce cusp by 2mm on a flat base for more resistanceB. Reduce cusp by 2mm following the outline of the cuspC. Reduce 2mm for retention form 3. Before filling a class V abrasion cavity with GIC you should A. Clean with pumice, rubber cup, water and weak acidB. Dry the cavity thoroughly before doing anythingC. Acid itch cavity then dry thoroughly 4. Which of the following statement about the defective marginsof amalgam   restoration is true? A. The larger the breakdown, the greater the chance of decay. 5. The retention Pin in an amalgam restoration should be placed A. Parallel to the outer wallB. Parallel to the long axis of tooth 6. The most common cause of failure of the IDN “Inferior DentalNerve” block is A. Injecting too lowB. Injecting too high 7. Which one of the following are not used in water fluoridation A. SnF2B. 1.23% APFC. H2SiF2D. CaSiF2E. 8% Stannous fluoride 8. The best way to clean cavity before the placement of GIC is A. H2O2B. Phosphoric AcidC. Polyacrylic acid   2 9. The most mineralised part of dentine is A. Peritubular dentine 10. A 45 year old patient awoke with swollen face, puffinessaround the eyes, and oedema of the upper lip with redness anddryness. When he went to bed he had the swelling, pain ordental complaints. Examination shows several deep silicaterestorations in the anterior teeth but examination is negativefor caries, thermal tests, percussion, palpation, pain, andperiapical area of rarefaction. The patient’s temperature isnormal. The day before he had a series of gastrointestinal x-rays at the local hospital and was given a clean bill of health.The condition is A. Acute periapical abscessB. Angioneurotic oedemaC. Infectious mononucleosisD. Acute maxillary sinusitisE. Acute apical periodontitis 11. Internal resorption is A. Radiolucency over unaltered canalB. Usually in a response to traumaC. Radiopacity over unaltered canal 12. On replantation of an avulsed tooth could see A. Surface resorption, external resorptionB. Internal resorptionC. Inflammatory resorptionD. Replacement resorptionE. A, C and DF. All of the above 13. The percentage of total dentine surface dentinal tubules makein 0.5mm away   from pulp is A. 20%   B. 50% 14. The junction between primary and secondary dentine is A. A reversal lineB. Sharp curvatureC. A resting lineD. A reduction in the number of tubules   3 15. What is the correct sequence of events A. Differentiation of odontoblast, elongation of enamel epithelium,dentine formation then enamel formation.B. Differentiation of odontoblast, dentine formation then enamelformation, elongation of enamel epithelium.C. Elongation of enamel epithelium, differentiation of odontoblast,dentine formation then enamel formation. 16. What is the sequence from superficial to the deepest indentine caries A. Zone of bacterial penetration, demineralisation, sclerosis, reparativedentineB. Zone of bacterial penetration, reparative dentine, demineralisation,sclerosis.C. Zone of bacterial penetration, sclerosis, reparative dentine,demineralisation. 17. The nerve supply of the pulp is composed of which type of nerve fibres A. Afferent & sympathetic 18. In which direction does the palatal root of the upper firstmolar usually curve   towards A. Facial / buccal/B. LingualC. MesialD. Distal 19. What is the common appearance of vertical tooth fracture A. Perio abscess like appearanceB. Displacement of fragments 20. Which of the following would be ONE possible indication forindirect pulp   capping A. Where any further excavation of dentine would result in pulp exposure.B. Removal of caries has exposed the pulpC. When carious lesion has just penetrated DEJ 21. Following trauma to tooth, the next day there was noresponse to pulp tests you   should A. Review again later   4B. Start endodontic treatmentC. Extraction of tooth 22. What is the main purpose of performing pulp test on arecently traumatised tooth A. Obtain baseline responseB. Obtain accurate indication about pulp vitality 23. What is the main function of EDTA in endodontics A. Decalcification of dentineB. Cleaning debris from root canal 24. Which is NOT TRUE in relation to the prescription of 5mg or10mg of diazepam for   sedation A. Patient commonly complain of post operative headacheB. An acceptable level of anxiolytic action is obtained when the drug isgiven one hour preoperativelyC. There is a profound amnesic action and no side affectsD. Active metabolites can give a level of sedation up to 8 hours postoperativelyE. As Benzodiazepine the action can be reversed with Flumazepil 25. Which of the following is TRUE in regards to high risk patient A. 0.1ml of blood from Hepatitis B carrier is less infective than 0.1ml of blood from HIV patientB. 0.1ml of blood from Hepatitis B carrier is more infective than 0.1ml of blood from HIV patientC. Level of virus are similar in the blood and saliva of HIV patientD. Level of virus in the saliva is not significant for Hepatitis B patientE. The presence of Hepatitis B core Antigen in the blood means thatactive disease is not present 26. Your employer in an attempt to update office sterilizationprocedures; what would   you recommend as the BEST methodto verify that sterilization has occurred** A. Use spore test dailyB. Use indicator strips in each load and color change tape on eachpackageC. Use indicator strips daily and spore test weeklyD. Use color change tape daily and spore test monthlyE. Use color change tape in each load and spore tests weekly 27. A 65 year old woman arrived for dental therapy. The answeredquestionnaire   shows that she is suffering from severe cirrhosis.
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