Endodontics R11 Endodontics SDLE MCQ | Part 1 Report a question What’s wrong with this question? You cannot submit an empty report. Please add some details. 0% 12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364 Endodontics R11 Endodontics SDLE MCQ | Part 1 DentQuiz SDLE Mock Exam Instruction To mark a question and come back to it later, click the Bookmark icon. For the best experience, use a computer and switch to full screen button (from the top left corner). You can review and change your answers before clicking Next. Explanations will appear after each question to help you understand the correct answer. Your results will be shown right after you finish the exam. This is a fresh attempt — previous answers or bookmarks won’t be saved. The source of the questions and answers is recent Rafee’ Al-Maqam files. Special thanks to رفيع المقام. Answers are based on colleagues best efforts and may not be 100% accurate. If you believe an answer is incorrect, please click the Report button to let us know. Please fill in your details to continue NameEmailPhone Number 1 / 64 Category: Endodontics 1) What is most effective during RCT? Sodium hypochlorite Hydrogen peroxide Saline EDTA NaOCl is the gold standard for disinfection. 2 / 64 Category: Endodontics 2) What is the splinting time for dentoalveolar fracture? 6 weeks 4 weeks 2 weeks 8 weeks The standard splinting time is 4 weeks. 3 / 64 Category: Endodontics 3) What is the most probable mishap in the upper second molar? Perforation Instrument fracture Overfilling Ledge formation Instrument fracture is common due to the complex anatomy of upper second molars. 4 / 64 Category: Endodontics 4) What is the definition of concussion? Pulp necrosis Fracture of the root Injury to the tooth and ligament without displacement or mobility Tooth displacement Concussion involves injury without displacement or mobility. 5 / 64 Category: Endodontics 5) What is the splinting time for alveolar bone fracture? 8 weeks 1-2 weeks 6-7 weeks 3-4 weeks The recommended splinting time is 3-4 weeks. 6 / 64 Category: Endodontics 6) Which trauma is associated with a “high metallic sound”? Avulsion Intrusion Subluxation Concussion Intrusion produces a high metallic sound upon percussion. 7 / 64 Category: Endodontics 7) A patient has a horizontal fracture between the middle and apical third with an osseous lesion. The tooth does not respond to cold. What is the treatment? RCT for the coronal segment Extract the tooth RCT for both segments Splint the two segments Only the coronal segment requires RCT. 8 / 64 Category: Endodontics 8) What causes NaOCl extrusion during irrigation? Open apex All of the above Small apical size Excessive pressure All factors can contribute to NaOCl extrusion. 9 / 64 Category: Endodontics 9) Where is the second canal located in a lower central incisor? Lingual Facial Distal Mesial The second canal is typically lingual. 10 / 64 Category: Endodontics 10) What type of bacteria are found in a necrotic tooth? Facultative Aerobic Microaerophilic Anaerobic Necrotic teeth are predominantly infected with anaerobic bacteria. 11 / 64 Category: Endodontics 11) Which tooth most commonly shows 8 root configurations? Maxillary second premolar Mandibular second premolar Maxillary first molar Mandibular first molar The maxillary second premolar (upper 5) can have 8 root configurations. 12 / 64 Category: Endodontics 12) A child has a traumatized anterior tooth that appears longer. What is the diagnosis? Avulsion Fracture Intrusion Extrusion The tooth appears longer due to extrusion. 13 / 64 Category: Endodontics 13) A child has an avulsed primary tooth stored in milk and arrives immediately. What is the management? Splint the tooth Wait for parents Reimplant without consent Contraindicated to reimplant Reimplantation is contraindicated for primary teeth. 14 / 64 Category: Endodontics 14) A patient has a traumatized anterior tooth with enamel and dentin affected, but the pulp is vital. What is this case? Complicated crown fracture Uncomplicated crown fracture Concussion Root fracture No pulp exposure makes it an uncomplicated crown fracture. 15 / 64 Category: Endodontics 15) What is the length of the working part of ISO files? 16mm 25mm 20mm 18mm The standard working length of ISO files is 16 mm. 16 / 64 Category: Endodontics 16) What is the appropriate way to remove GP? Use heat Use rotary files Use H-files and Gates Glidden Use ultrasonic vibration H-files and Gates Glidden are effective for GP removal. 17 / 64 Category: Endodontics 17) A file fractured after finishing preparation with a large size. What is the prognosis? Good Questionable Poor Hopeless Good progrnosis 18 / 64 Category: Endodontics 18) An X-ray shows GP beyond the apex. What is the reason? No apical stop Incorrect file size Over-condensation Ledge formation The absence of an apical stop allows GP extrusion. 19 / 64 Category: Endodontics 19) What is the splinting time for a horizontal root fracture between the apical and middle third? 8 weeks 4 weeks 2 weeks 6 weeks The recommended splinting time is 4 weeks. 20 / 64 Category: Endodontics 20) What is the most common cause of ledge formation? Irrigant choice File size Canal curvature Instrumentation technique Improper instrumentation technique is the primary cause of ledges. 21 / 64 Category: Endodontics 21) What is the primary use of root canal sealer? Increase strength of filling Fill the voids Irrigate the canal Disinfect the canal Sealers are used to fill voids between the GP and canal walls. 22 / 64 Category: Endodontics 22) A patient has permanent incisors intruded 3-4 mm. What is the treatment? Surgical extraction RCT Orthodontic extrusion Splint the teeth Orthodontic extrusion is the preferred treatment. 23 / 64 Category: Endodontics 23) A patient has a crown fracture at the gingival margin with large pulp exposure 2 days after trauma. What is the treatment? Apexification RCT Pulpotomy Direct pulp capping RCT is needed for large exposures in mature teeth. 24 / 64 Category: Endodontics 24) What is the prognosis for vertical root fracture (VRF) in a single tooth? Questionable Poor Hopeless Good VRF typically has a hopeless prognosis. 25 / 64 Category: Endodontics 25) A 14-year-old patient has tooth 21 intruded 5 mm. How to treat? Splint the tooth RCT Orthodontic extrusion Surgical extrusion Orthodontic extrusion is preferred for intruded teeth. 26 / 64 Category: Endodontics 26) For a 35 rotary file with 0.04 taper, calculate D9. 0.66mm 0.71mm 0.40mm 0.35mm D9 = (0.04 × 9) + (35/100) = 0.71 mm. 27 / 64 Category: Endodontics 27) What is the main component of GP? Calcium hydroxide Resin Zinc oxide Gutta-percha Zinc oxide is the primary component of GP. 28 / 64 Category: Endodontics 28) During instrumentation, the master apical file did not reach the working length (ledge). What is the management? Widen the canal using ultrasonic scaler Force a larger file Place calcium hydroxide dressing Bypass with a small curved file A small curved file can help bypass the ledge. 29 / 64 Category: Endodontics 29) An endo-treated tooth is short and needs re-RCT. What type of bacteria is likely present? Enterococcus faecalis Porphyromonas gingivalis Streptococcus mutans Lactobacillus E. faecalis is commonly found in retreated canals. 30 / 64 Category: Endodontics 30) What is the management for a mid-root fracture? Extract the coronal segment RCT No treatment needed Splint for 4 weeks Splinting for 4 weeks is the standard treatment. 31 / 64 Category: Endodontics 31) A curved root canal in an upper molar is shown. What mishap is likely to happen? Perforation at the bifurcation Overfilling Ledge formation File separation Curved canals are prone to ledge formation. 32 / 64 Category: Endodontics 32) An upper central incisor was avulsed 2 days ago and kept in a dry plastic bag. What should be done? Reimplant without cleaning Do not reimplant; replace with a prosthesis Splint adjacent teeth Clean and reimplant Reimplantation is contraindicated after 2 hours in dry conditions. 33 / 64 Category: Endodontics 33) A 7-year-old child had trauma a year ago. What improvement would you expect? Lack of radiolucency Tooth eruption Lack of pain Growth of root In young patients, root growth is a positive sign. 34 / 64 Category: Endodontics 34) What is the treatment for an apical root fracture? No treatment needed RCT Extract the apical third Splint the tooth Splinting is the standard treatment for apical root fractures. 35 / 64 Category: Endodontics 35) You lost your working length due to a ledge. What should you do? Stop instrumentation Irrigate with NaOCl Force a larger file Use a pre-curved file (size 8-10) A pre-curved small file can help regain working length. 36 / 64 Category: Endodontics 36) A 12-year-old patient has tooth 11 shorter than 21 after trauma. What is the diagnosis? Intrusion Extrusion Lateral luxation Avulsion The tooth appears shorter due to intrusion. 37 / 64 Category: Endodontics 37) What is the fixation time for intrusion? 2 weeks 4 weeks 6 weeks 8 weeks The recommended fixation time is 4 weeks. 38 / 64 Category: Endodontics 38) A broken instrument is in the middle of the root. A bypass was made, and obturation was performed. What is the prognosis? Good Questionable Hopeless Poor With successful bypass and obturation, the prognosis is good. 39 / 64 Category: Endodontics 39) What is the splinting time for lateral luxation? 4 weeks 2 weeks 6 weeks 8 weeks The standard splinting time is 4 weeks. 40 / 64 Category: Endodontics 40) A patient experienced pain and swelling after irrigation with 5.5% NaOCl. What caused this? Mechanical irritation Allergic reaction Bacterial infection NaOCl extrusion NaOCl extrusion beyond the apex causes severe pain and swelling. 41 / 64 Category: Endodontics 41) What should be done after a NaOCl accident? Stop treatment and give antibiotics LA, I&D, irrigation Reassure and continue treatment Leave the tooth open Immediate management includes LA, I&D, and irrigation. 42 / 64 Category: Endodontics 42) How to manage a ledge? Use ultrasonic vibration Use a small pre-curved manual file Force a larger file Perform apicoectomy A small pre-curved file is the best way to manage a ledge. 43 / 64 Category: Endodontics 43) Enamel and dentin are affected without pulp involvement. What Ellis type is this? Type 4 Type 2 Type 3 Type 1 Ellis Type 2 involves enamel and dentin without pulp exposure. 44 / 64 Category: Endodontics 44) An endo case shows GP beyond the apex. What is the reason? GP pushed during condensation Over-instrumentation Incorrect WL measurement No apical stop (like MAC) Lack of an apical stop allows GP to extrude beyond the apex. 45 / 64 Category: Endodontics 45) For a K-file size 30 with a taper of 0.04, what is its diameter at D9? 0.90mm 0.50mm 0.66mm 0.30mm D0 (tip diameter) = 30/100 = 0.3 mm; D9 = (0.04 × 9) + 0.3 = 0.66 mm. 46 / 64 Category: Endodontics 46) A patient came with a separated instrument. The doctor used ultrasonic to loosen the file. What is the next step? Perform apicoectomy Leave the file in place Remove the separated instrument Obturate the canal After loosening, the next step is to remove the separated instrument. 47 / 64 Category: Endodontics 47) What instruments are used to remove GP? Ultrasonic tips K-files and reamers Rotary files H-files and Gates Glidden H-files and Gates Glidden are the standard tools. 48 / 64 Category: Endodontics 48) What is the shape of the access opening for a central incisor? Rectangular Triangular or trapezoid Oval Round The access opening for central incisors is typically triangular or trapezoid. 49 / 64 Category: Endodontics 49) A file separated in the apical third, and attempts to bypass it failed. What should be done? Obturate to the length of the instrument Leave the tooth open Perform surgical treatment Extract the tooth Obturate to the length of the instrument if bypassing fails. 50 / 64 Category: Endodontics 50) What is the tip diameter for file #20? 0.20mm 20mm 0.30mm 0.02mm The tip diameter for file #20 is 0.20 mm (size/100). 51 / 64 Category: Endodontics 51) Which instrument has a negative rake angle? Rotary file Reamer K-file H-file K-files have a negative rake angle, which makes them less aggressive. 52 / 64 Category: Endodontics 52) What is the access cavity shape for an upper first premolar? Round Rectangular Triangular Oval Most maxillary premolars have an oval access cavity. 53 / 64 Category: Endodontics 53) A patient had an avulsed central tooth replanted after 45 minutes. After one week, the lateral is vital, but the central is non-vital. What should be done? Monitor without treatment Remove splint and perform RCT Leave splint and perform RCT on the central Extract the tooth The central tooth requires RCT, but the splint should remain. 54 / 64 Category: Endodontics 54) What is the access cavity shape for an upper first premolar with 3 canals? Round Oval Rectangular Triangular With 3 canals, the access cavity becomes triangular. 55 / 64 Category: Endodontics 55) A patient has a traumatized anterior tooth with enamel, dentin, and pulp affected. What is this case? Luxation Complicated crown fracture Root fracture Uncomplicated crown fracture Pulp exposure makes it a complicated crown fracture. 56 / 64 Category: Endodontics 56) A patient came for retreatment of a short RCT filling with a periapical lesion. What is the predominant bacteria in the canal? S. mutans E. faecalis P. gingivalis L. acidophilus E. faecalis is the most common bacteria in such cases. 57 / 64 Category: Endodontics 57) A file separated in the middle. What is the prognosis if the dentist was able to retrieve it? Questionable Hopeless Good Poor If the file is retrieved, the prognosis is good. 58 / 64 Category: Endodontics 58) What is the recommended isolation method for RCT on a maxillary anterior tooth in an asthmatic patient? Use cotton rolls Place rubber dam, then change to cotton rolls Start with cotton rolls, then rubber dam Apply rubber dam throughout Rubber dam is essential for isolation, even in asthmatic patients. 59 / 64 Category: Endodontics 59) Why is NaOCl better than CHX for irrigation? It dissolves organic tissue It is less toxic It is cheaper It has longer residual effect NaOCl dissolves organic tissue, enhancing cleaning. 60 / 64 Category: Endodontics 60) A patient has a horizontal radiolucent line in the middle of the root, a yellowish tooth, and a history of trauma. Cold test shows a late response. What is the diagnosis? Internal resorption Periapical abscess Root fracture Crown/root fracture The findings are consistent with a root fracture. 61 / 64 Category: Endodontics 61) The master cone is size 50 and the flare is done for size 60. What will be the GP size? 0.50 taper ISO 0.60 taper 0.55 taper 0.50 taper The master cone determines the GP size, which is 0.50 taper. 62 / 64 Category: Endodontics 62) Which irrigation material has the best antibacterial properties? Sodium hypochlorite EDTA Saline Chlorhexidine NaOCl is the most effective antibacterial irrigant. 63 / 64 Category: Endodontics 63) What is the diameter of Gates Glidden #2? 0.9mm 0.5mm 1.0mm 0.7mm Gates Glidden #2 has a diameter of 0.7 mm. 64 / 64 Category: Endodontics 64) A child has a crown fracture with small pulp exposure and normal apical bone 3 hours after trauma. What is the treatment? Vital pulp therapy Apexification Pulpotomy RCT Vital pulp therapy is indicated for small exposures in young teeth. Your score is The average score is 57% Facebook Twitter 0% Restart quiz Please rate this exam and leave a comment with any notes or suggestions. Anonymous feedback Thank you for your feedback Send feedback
