1000+ Mcqs –Operative & Endodontics Questions And Answers 2023/2024

1000+ MCQS –OPERATIVE & ENDODONTICS QUESTIONS AND ANSWERS 2023/2024 1. For lower premolars, the purpose of inclining the handpiece lingually is to, A. Avoid buccal pulp horn B. Avoid lingual pulp horn C. Remove unsupported enamel D. Conserve lingual dentine 2. For an amalgam Restoration of weakened cusp you should, A. reduce cusp by 2mm on a flat base for more resistance B. reduce cusp by 2mm following the outline of the cusp C. 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 acid B. Dry the cavity thoroughly before doing anything C. Acid itch cavity then dry thoroughly 4. Which of the following statement about the defective margins of 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 wall B. Parallel to the long axis of tooth 8. The best way to clean cavity before the placement of GIC is, A. H2O2 B. Phosphoric Acid C. Polyacrylic acid 9. The most mineralised part of dentine is, A. Peritubular dentine 11. Internal resorption is, A. Radiolucency over unaltered canal 1. A 2.B 3.A 4.A 5.A 8.C 9.A B. Usually in a response to trauma C. Radiopacity over unaltered canal 13. The percentage of total dentine surface dentinal tubules make in 0.5mm away from pulp is, A. 20% B. 50% 14. The junction between primary and secondary dentine is, A. A reversal line B. Sharp curvature C. A resting line D. A reduction in the number of tubules 16. What is the sequence from superficial to the deepest in dentine caries? A. Zone of bacterial penetration, demineralisation, sclerosis, reparative dentine B. Zone of bacterial penetration, reparative dentine, demineralisation, sclerosis. C. Zone of bacterial penetration, sclerosis, reparative dentine, demineralisation. 18. In which direction does the palatal root of the upper first molar usually curve towards? A. buccal B. Lingual C. Mesial D. Distal 19. What is the common appearance of vertical tooth fracture? A. Perio abscess like appearance B. Displacement of fragments 20. Which of the following would be ONE possible indication for indirect pulp capping? A. Where any further excavation of dentine would result in pulp exposure. B. Removal of caries has exposed the pulp C. When carious lesion has just penetrated DEJ 21. Following trauma to tooth, the next day there was no response to pulp tests you should? A. Review again later 11. B 13.B 14.B 16.A 18.A 19.A 20.A B. Start endodontic treatment C. Extraction of tooth 22. What is the main purpose of performing pulp test on a recently traumatised tooth? A. Obtain baseline response B. Obtain accurate indication about pulp vitality 23. What is the main function of EDTA in endodontics? A. Decalcification of dentine B. Cleaning debris from root canal 85. the pulp horn most likely to be exposed in the preparation of large cavity in permanent molar tooth is, A. Mesio-Lingual in upper first molars B. Mesio-Buccal in upper first molars C. Disto-buccal in lower first molars D. Mesio-Lingual in lower first molars E. Mesio- Buccal in lower first molar 93. For dental caries to progress in dentine, A. The dentine must contain soluble collagen B. Enamel must contain glycoproteins C. Diet must contain simple carbohydrate D. Diet must contain polysaccharides E. Pulp must contain complement 119. The BEST treatment for alveolar abscess: A. Endontic treatment or extraction B. Incision and drainage alone C. Extraction D. Endodontic 123. A cusp