Endodontics Endodontics SDLE MCQ | Part 2 Facebook X LinkedIn Messenger Messenger WhatsApp Telegram Print Report a question What's wrong with this question? You cannot submit an empty report. Please add some details. 0% 1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950 Endodontics Endodontics SDLE MCQ | Part 2 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 / 50 Category: Endodontics 1) Where should the obturation stop in the root canal? Anatomical apex Major apical constriction Minor apical constriction Radiographic apex Obturation should stop at the minor apical constriction for optimal sealing. 2 / 50 Category: Endodontics 2) A patient has irreversible pulpitis in tooth #37 and an impacted #38 with a large cyst. What is the first step? Treat #37 and inform the patient No treatment Inform the patient about the cyst Extract #38 Treat the symptomatic tooth first, then address the cyst. 3 / 50 Category: Endodontics 3) Which instrument has an active cutting tip? K file Barbed broach H file Reamer The K file has an active cutting tip, making it effective for canal preparation. 4 / 50 Category: Endodontics 4) What is the likely outcome of intrusion of a primary incisor? Devitalization No effect Possible palatal displacement of permanent Hypoplasia Intrusion of primary incisors can affect the position of permanent successors. 5 / 50 Category: Endodontics 5) A pediatric patient has deep caries with intermittent pain provoked by sweets. What is the diagnosis? Pulp necrosis Pulp polyp Reversible pulpitis Irreversible pulpitis Intermittent pain suggests reversible pulpitis. 6 / 50 Category: Endodontics 6) A 13-year-old with an avulsed tooth kept in milk. What is the best management? Extraoral RCT Reimplant immediately Splint it directly Keep it in milk Milk is a suitable medium for preserving the tooth before reimplantation. 7 / 50 Category: Endodontics 7) Which temporary filling material provides the best sealing ability after RCT? Glass ionomer Fermit Cavit IRM Glass ionomer provides excellent sealing ability. 8 / 50 Category: Endodontics 8) What type of resorption is caused by non-vital bleaching? Replacement External cervical Surface Internal Non-vital bleaching can lead to external cervical resorption. 9 / 50 Category: Endodontics 9) Pain increases with hot food and decreases with cold. What is the likely diagnosis? Periodontitis Symptomatic irreversible pulpitis Necrosis Reversible pulpitis This is a classic symptom of irreversible pulpitis. 10 / 50 Category: Endodontics 10) A patient feels discomfort in a lower bridge (44-46). Tooth #44 has a tear-drop radiolucency. What is the diagnosis? Vertical root fracture Periapical abscess Failed endo Normal Tear-drop radiolucency suggests vertical root fracture. 11 / 50 Category: Endodontics 11) A molar tooth has a deep restoration and one canal is obliterated. What is the likely cause? Calcification Internal resorption Fracture External resorption Calcification is a common response to deep restorations. 12 / 50 Category: Endodontics 12) A patient has implants in the anterior lower jaw. The adjacent natural tooth is mobile (grade 3) with a very short root and no pain on endo tests. What is the treatment? Endo and follow up Perio and follow up Perio then endo Endo immediately and adjunctive Perio Mobility and short roots suggest periodontal issues; endo is not indicated without symptoms. 13 / 50 Category: Endodontics 13) What is the best instrument to locate the orifice in endo? Explorer Ultrasonic Reamer File An explorer is used to locate canal orifices. 14 / 50 Category: Endodontics 14) An X-ray shows short roots with bone replacement. What is the diagnosis? Internal resorption Surface resorption Cervical resorption External replacement resorption External replacement resorption involves bone replacing the root structure. 15 / 50 Category: Endodontics 15) An unclear X-ray is taken with a mesial shift. Which structure is mesial? Mesiolingual Buccal Distal Mesiobuccal The SLOB rule (Same Lingual, Opposite Buccal) applies. 16 / 50 Category: Endodontics 16) A tooth was avulsed and kept in milk for 3 hours. What is the management? Immerse in 2% sodium fluoride for 20 minutes and splint No treatment Extract the tooth Immediately splint with rigid splint Sodium fluoride helps reduce resorption, and splinting stabilizes the tooth. 17 / 50 Category: Endodontics 17) What is the effect of intrusion of primary central incisors on the permanent successor? No effect Hypoplasia Devitalization Palatal orientation of crown Intrusion of primary teeth can cause palatal displacement of permanent successors. 18 / 50 Category: Endodontics 18) What is D9 of a rotary file with size 10 and taper 0.02? 0.28 0.32 0.3 0.34 D9 = 0.10 (size) + (0.02 × 9) = 0.28. 19 / 50 Category: Endodontics 19) Calculate D9 of a file with size 30 and taper 0.04. 0.3 0.72 0.66 0.36 D9 = 0.30 (size) + (0.04 × 9) = 0.66. 20 / 50 Category: Endodontics 20) What type of trauma causes a central incisor to appear longer than adjacent teeth? Extrusion Intrusion Avulsion Lateral luxation Extrusion causes the tooth to appear longer due to displacement. 21 / 50 Category: Endodontics 21) A molar has radiolucency below the furcation, deep probing depth, and is necrotic. What is the diagnosis? Primary perio secondary endo Perio only Primary endo secondary perio Endo only Necrotic pulp with deep probing suggests endodontic involvement. 22 / 50 Category: Endodontics 22) Why is the smear layer removed during endo? To improve antimicrobial activity To allow sealer penetration None To reduce sealer setting time Removing the smear layer ensures better sealer adhesion. 23 / 50 Category: Endodontics 23) What is the most common cause of a broken file during RCT? Poor file quality Inadequate access cavity Curved canals Excessive force Inadequate access cavity increases the risk of file separation. 24 / 50 Category: Endodontics 24) A patient has pain on biting on teeth #44 and #45. Large amalgam restorations are present. What is the best diagnostic test? Palpation PA Percussion Examination and transillumination Pain on biting suggests percussion testing. 25 / 50 Category: Endodontics 25) How to check for crown and root fracture? Seating jig Tooth slooth Percussion X-ray Tooth slooth is a diagnostic tool for identifying crown and root fractures. 26 / 50 Category: Endodontics 26) How long should calcium hydroxide be placed in the canal for optimal antimicrobial effect? 1 Month 1 Hour 1 Week 1 Day Calcium hydroxide requires at least 1 week to exert its antimicrobial effect. 27 / 50 Category: Endodontics 27) A tooth had RCT, failed, and was re-treated. An apical abscess is present. What is the prognosis? Fair Good Poor Questionable Persistent apical abscess indicates a poor prognosis. 28 / 50 Category: Endodontics 28) How long should a cervical tooth fracture be splinted? 6 months 12 months 4 months 8 months Cervical fractures typically require 4 months of splinting. 29 / 50 Category: Endodontics 29) Which rotary file system uses reciprocation movement? H-file ProTaper WaveOne K-file WaveOne uses a reciprocating motion for canal preparation. 30 / 50 Category: Endodontics 30) How far should root canal preparation extend? Beyond the radiographic apex 0.5 to 1 mm before the radiographic apex At the radiographic apex 1 to 2 mm before the radiographic apex Preparation should stop 0.5 to 1 mm before the radiographic apex. 31 / 50 Category: Endodontics 31) A 9-year-old child has a double horizontal root fracture. What is the management? Extract both segments Observe and follow up Splint the tooth Extract the coronal segment Management depends on whether the tooth is primary or permanent. 32 / 50 Category: Endodontics 32) A patient has an endo-perio lesion with deep pockets. What is the management? Start endo and follow up Start endo then perio Start perio Extraction Endo should be addressed first in endo-perio lesions. 33 / 50 Category: Endodontics 33) A tooth has two broken files beyond the apex. What is the prognosis? Poor Fair Good Questionable Broken files beyond the apex have a poor prognosis. 34 / 50 Category: Endodontics 34) A tooth with deep caries and normal pulp is sensitive to percussion but not tender. Upon caries removal, pulp exposure occurs. What is the diagnosis? Asymptomatic irreversible pulpitis with symptomatic apical tissue Asymptomatic irreversible pulpitis with normal apical tissue Necrotic pulp Reversible pulpitis Pulp exposure with normal apical tissue indicates asymptomatic irreversible pulpitis. 35 / 50 Category: Endodontics 35) A patient has discomfort while biting and a gap between gutta-percha and a metal post. What is the management? Perform endo surgery Redo RCT Prescribe analgesics Reassure the patient A gap indicates a failed RCT, so redoing the RCT is necessary. 36 / 50 Category: Endodontics 36) How long should calcium hydroxide be placed in the canal for antimicrobial effect? 24 hours 3 days 2 weeks 4 weeks Calcium hydroxide requires 2 weeks for optimal antimicrobial effect. 37 / 50 Category: Endodontics 37) What is the maximum size of an endo voxel? 0.02mm 0.4mm 0.04mm 0.2mm The maximum size of an endo voxel is 0.2mm. 38 / 50 Category: Endodontics 38) What is the composition of PCA? EDTA, urea peroxide, glycol None EDTA, NaOCl, glycol EDTA, CaOH, glycol PCA contains EDTA, urea peroxide, and glycol. 39 / 50 Category: Endodontics 39) A patient presents with trauma and pulp exposure 1 day ago. What is the treatment? Direct pulp capping Pulpotomy RCT Partial pulpotomy Pulpotomy is indicated for recent pulp exposure in vital teeth. 40 / 50 Category: Endodontics 40) A 75-year-old patient presents with a broken MO restoration. Probing depth is normal, cold test shows no response, EPT is positive, and percussion/palpation is normal. What is the diagnosis? Necrotic pulp Symptomatic irreversible pulpitis Asymptomatic irreversible pulpitis Normal pulp and apical tissue Positive EPT and normal percussion/palpation indicate normal pulp. 41 / 50 Category: Endodontics 41) Which tooth is most difficult to anesthetize in symptomatic irreversible pulpitis? Lower molar Lower premolar Upper molar Upper premolar Lower molars are challenging due to dense bone and nerve anatomy. 42 / 50 Category: Endodontics 42) A patient has a horizontal root fracture between the middle and apical thirds. The fracture line is radiopaque, and there is no response to cold test. What is the treatment? Extraction RCT for all roots Pulpotomy RCT for coronal part only Only the coronal part requires RCT in horizontal root fractures. 43 / 50 Category: Endodontics 43) Why is the smear layer removed during endo? None To allow bactericidal properties To reduce sealer setting time To improve sealer adhesion Removing the smear layer improves sealer penetration. 44 / 50 Category: Endodontics 44) What is the consequence of direct pulp capping in a primary tooth? External resorption Pulp obliteration Internal resorption Pulp necrosis Direct pulp capping in primary teeth can lead to internal resorption. 45 / 50 Category: Endodontics 45) A necrotic tooth without swelling requires what treatment? Antibiotics Start endo Extraction Follow up Necrotic teeth without swelling should be treated with RCT. 46 / 50 Category: Endodontics 46) A calcified canal is difficult to locate. What is the best test? X-ray Methylene blue Bubble test CBCT The bubble test helps locate calcified canals. 47 / 50 Category: Endodontics 47) A tooth with a history of trauma 20 years ago has 1/3 of the crown remaining. What is the prognosis? Poor Good Questionable Fair Severe crown loss indicates a poor prognosis. 48 / 50 Category: Endodontics 48) During RCT, an apex locator makes a sound when inserted. What is happening? Normal Apical perforation File separation Coronal perforation A sound from the apex locator suggests coronal perforation. 49 / 50 Category: Endodontics 49) A sound tooth has pain on percussion and no response to cold test. What is the diagnosis? Periodontal combined Perio primary with endo secondary Endo primary with perio secondary True combined Pain on percussion and no cold response suggest periodontal issues. 50 / 50 Category: Endodontics 50) How many canals does an upper first premolar typically have? 2 3 4 1 Upper first premolars usually have two canals. 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