Endodontics R11 Endodontics SDLE MCQ | Part 2 Report a question What’s wrong with this question? You cannot submit an empty report. Please add some details. 0% 123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263 Endodontics R11 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 / 63 Category: Endodontics 1) An endo-treated tooth (#37) causes pain. Likely cause? Periapical cyst Missing MB2 Overfilling Cracked root Missed MB2 canals are a common cause of persistent pain. 2 / 63 Category: Endodontics 2) Which nerve fiber is responsible for sharp pain? A-beta fibers Unmyelinated C fibers Myelinated A-delta fibers B fibers A-delta fibers transmit sharp, localized pain. 3 / 63 Category: Endodontics 3) What measures pulp oxygen levels? Cold test Laser Doppler Pulp oximeter EPT Pulp oximetry assesses pulp vitality via oxygen saturation. 4 / 63 Category: Endodontics 4) A patient has pain post-RCT with no intervention needed. Treatment? Muscle relaxant NSAID Steroid Antibiotic NSAIDs manage post-operative inflammation. 5 / 63 Category: Endodontics 5) What is the best sterilization method for gutta-percha? Glutaraldehyde Full-concentration NaOCl 5.25% NaOCl CHX 5.25% NaOCl effectively sterilizes gutta-percha. 6 / 63 Category: Endodontics 6) What is the best management for a perforation? Immediate repair with MTA Extraction No treatment Delayed repair MTA provides an immediate seal for perforations. 7 / 63 Category: Endodontics 7) A child with trauma has a tooth with a pink spot after 3 days. Treatment? Apexification Monitoring Pulpectomy Pulpotomy Pink spots often indicate internal resorption requiring pulpectomy. 8 / 63 Category: Endodontics 8) What is the medicament for a weeping canal? Formocresol Calcium hydroxide Ledermix Saline Calcium hydroxide dries exudate and disinfects. 9 / 63 Category: Endodontics 9) What makes MTA radiopaque? Silica Calcium Zinc Bismuth Bismuth oxide in MTA provides radiopacity. 10 / 63 Category: Endodontics 10) What is the cause of a pinkish tooth? Enamel hypoplasia Internal resorption External resorption Caries Internal resorption leads to vascular changes causing pink discoloration. 11 / 63 Category: Endodontics 11) Which material is most toxic? Ledermix MTA Ferric sulfate CAH Ferric sulfate is cytotoxic to tissues. 12 / 63 Category: Endodontics 12) Which type of canal is most difficult to treat in endodontics? Long, curved, narrow Fused roots Calcified Short, straight, wide Long, curved, narrow canals are technically challenging. 13 / 63 Category: Endodontics 13) During RCT, uncontrolled bleeding and lost WL indicate? Instrument separation Calcified canal Perforation Cracked root Sudden bleeding and WL loss suggest perforation. 14 / 63 Category: Endodontics 14) Which tooth consistently has a single canal? Maxillary canine Mandibular canine Mandibular premolar Maxillary central Maxillary central incisors typically have one canal. 15 / 63 Category: Endodontics 15) Which material promotes periapical healing? Corticosteroids Eugenol Calcium hydroxide Zinc phosphate Calcium hydroxide aids in healing due to its biocompatibility. 16 / 63 Category: Endodontics 16) A patient complains of dark tooth after RCT. What is the most probable cause? Debris in tubules Bacterial infection Leaking restoration Blood pigments in tubules Blood pigments in tubules are common after trauma (if mentioned in the question). 17 / 63 Category: Endodontics 17) What is the recommended irrigation solution for an open apex? H2O2 and CHX EDTA and NaOCl H2O2 and NaOCl CHX and NaOCl EDTA and NaOCl are used for their combined ability to clean and disinfect the canal. 18 / 63 Category: Endodontics 18) A crowned tooth (#46) has normal probing but percussion pain. What should you do? Use a comp X-ray Extraction Remove the crown to check for cracks Take a panorama X-ray Cracks under crowns are a common cause of pain. 19 / 63 Category: Endodontics 19) When should MTA be placed after a perforation? After 1 week After cleaning and shaping After symptoms resolve Immediately Immediate placement prevents complications. 20 / 63 Category: Endodontics 20) What is a potential outcome of pulpotomy with ferric sulfate? External resorption Internal resorption Coronal resorption Apical resorption Ferric sulfate may trigger internal resorption. 21 / 63 Category: Endodontics 21) Where is MB2 located relative to MB1? Palatal Distal Mesial Buccal MB2 is typically palatal to MB1 in maxillary molars. 22 / 63 Category: Endodontics 22) How far should the spreader penetrate in lateral compaction? To the apex Half the canal length 3-4 mm Less than 1-2 mm Spreader should stay 1-2 mm short to avoid apical pressure. 23 / 63 Category: Endodontics 23) A tooth has pinpoint exposure with no bleeding. What is the treatment? Indirect pulp capping Direct pulp capping Extraction RCT Direct pulp capping is suitable for non-bleeding exposures. 24 / 63 Category: Endodontics 24) Which dental material has a caustic effect on tissues? Formocresol Zinc oxide MTA Calcium hydroxide Formocresol is known for its caustic properties. 25 / 63 Category: Endodontics 25) A calcified canal is encountered during RCT. What should you do? Refer to an endodontist Use ultrasonic tips Continue the procedure Take a CBCT Calcified canals often require specialized expertise. 26 / 63 Category: Endodontics 26) A patient presents with severe pain in tooth #46, sensitive to cold but negative to percussion. What is the emergency treatment? Pulpotomy Remove caries + filling Extraction Direct pulp capping Pulpotomy is the emergency treatment for irreversible pulpitis. 27 / 63 Category: Endodontics 27) What is the best diagnostic method for detecting a crack in a tooth? Transillumination Percussion test Biting test X-ray Transillumination highlights cracks effectively. 28 / 63 Category: Endodontics 28) What is the primary use of a nerve broach? Clean and shape canals Place medicaments Remove pulp tissue Measure canal length Nerve broaches extirpate pulp from canals. 29 / 63 Category: Endodontics 29) A pediatric patient with trauma and pinpoint pulp exposure for 3 days. What is the treatment? RCT Pulpotomy Direct pulp capping with MTA Indirect pulp capping Pulpotomy is preferred for traumatized primary teeth. 30 / 63 Category: Endodontics 30) How is internal resorption managed? Extraction Monitoring RCT Apexification RCT stops progressive internal resorption. 31 / 63 Category: Endodontics 31) What causes “sealer puffiness” in an endo-treated tooth with a lateral lesion? Lateral canal Vertical root fracture Periapical abscess Overfilled canal Sealer puffiness often indicates a lateral canal. 32 / 63 Category: Endodontics 32) Why might a canal disappear during RCT? Perforation Canal splitting Calcification File separation Canals may split into smaller, undetectable branches. 33 / 63 Category: Endodontics 33) What is the cross-section shape of a Flex-R file? Round Rectangular Triangular Square Flex-R files have a triangular cross-section for flexibility. 34 / 63 Category: Endodontics 34) A patient has fractures in enamel, dentin, and exposed pulp. What is the treatment? Pulpotomy Indirect pulp cap Direct pulp cap Extraction Direct pulp capping is indicated for exposed vital pulp. 35 / 63 Category: Endodontics 35) What is the primary indication for apexification? Open apex in immature teeth Periapical abscess Internal resorption Root fracture Apexification is used to induce apical closure in immature teeth. 36 / 63 Category: Endodontics 36) Why remove the access filling temporarily? To reassess canal anatomy To reduce cost To check hemostasis To avoid overfilling Temporary removal ensures proper hemostasis before final obturation. 37 / 63 Category: Endodontics 37) What is the purpose of a lentulo spiral? To dry canals To place sealer in tubules To enlarge canals To remove pulp Lentulo spirals deliver sealer into dentinal tubules. 38 / 63 Category: Endodontics 38) What does EDTA stand for? Ethylenediamine tetraacetic acid 12% Ethylenediamine tetraacetic acid 17% Ethanoldiamine tetraacetic acid 12% Ethanoldiamine tetraacetic acid 17% EDTA is a 17% chelating agent used in canal irrigation. 39 / 63 Category: Endodontics 39) What causes discoloration in an endo-treated traumatized tooth? Bacteria in dentinal tubules Debris in dentinal tubules Residual pulp tissue Blood components in tubules Blood pigments from trauma seep into dentinal tubules, causing discoloration. 40 / 63 Category: Endodontics 40) How many roots does an upper second molar usually have? 2 4 1 3 Maxillary second molars commonly have three roots. 41 / 63 Category: Endodontics 41) A patient has sensitivity to cold and a crack on the mesial surface. Pain stops upon stimulus removal. What is the pulp condition? Normal pulp Necrotic pulp Irreversible pulpitis Reversible pulpitis Reversible pulpitis is characterized by transient pain. 42 / 63 Category: Endodontics 42) A patient has pain in crowned teeth (#26, 27) with perfect RCT and crown. Next step? Cold test Remove crowns Percussion test CBCT CBCT detects hidden cracks or fractures. 43 / 63 Category: Endodontics 43) A patient returns with pain 2 days after RCT. No intervention is needed. What is the next step? Replace ibuprofen with acetaminophen Increase ibuprofen dose Prescribe antibiotics Combine ibuprofen with acetaminophen Combination therapy is more effective for pain control. 44 / 63 Category: Endodontics 44) Which root rarely has two canals? Palatal root of upper 6 Mesial root of lower 6 Distobuccal root of upper 6 Distal root of lower 6 The distobuccal root of maxillary molars seldom has two canals. 45 / 63 Category: Endodontics 45) Non-vital intracanal bleaching most commonly causes which type of resorption? Intraradicular Periapical External cervical Internal External cervical resorption is a known complication. 46 / 63 Category: Endodontics 46) What is a disadvantage of gutta-percha? Shrinks over time Lack of rigidity Poor sealing ability Difficult to remove Gutta-percha lacks rigidity, making it challenging in some cases. 47 / 63 Category: Endodontics 47) Which of the following is NOT a feature of calcium hydroxide sealer? Radiopaque Induces hard tissue formation Antibacterial Soluble Calcium hydroxide sealers are known to be soluble over time. 48 / 63 Category: Endodontics 48) In the SLOB technique, where is the lingual canal located? Mesial Distal Buccal Lingual SLOB rule: Same Lingual, Opposite Buccal. 49 / 63 Category: Endodontics 49) An 8-year-old patient has severe pain in tooth #6. What is the treatment? Pulpotomy RCT Extraction Apexogenesis Apexogenesis preserves pulp vitality in immature teeth. 50 / 63 Category: Endodontics 50) If the master file doesn’t reach the full working length, what should you do? Take a new X-ray Use a scaler Force the file into the canal Use irrigation with saline Irrigation helps remove debris blocking the canal. 51 / 63 Category: Endodontics 51) How to confirm vertical root fracture? CBCT Percussion test Exploratory surgery Transillumination Exploratory surgery provides definitive diagnosis. 52 / 63 Category: Endodontics 52) What type of sealer is AH26? Zinc oxide Resin Calcium hydroxide Glass ionomer AH26 is a resin-based sealer. 53 / 63 Category: Endodontics 53) A patient has pain in tooth #46 and an impacted adjacent tooth. What is the treatment? Extract the impacted tooth Inform about the impacted tooth Treat tooth #46 Monitor The pain is likely from #46, which requires treatment. 54 / 63 Category: Endodontics 54) What causes an orange-brown color when mixing solutions? CHX and H2O2 CHX and NaOCl NaOCl and saline H2O2 and EDTA CHX and NaOCl react to form an orange-brown precipitate. 55 / 63 Category: Endodontics 55) A patient has broken instruments in the apical third but is asymptomatic after 3 months. What is the management? Non-surgical retreatment Surgical intervention Extraction Follow-up Asymptomatic cases with broken instruments can be monitored. 56 / 63 Category: Endodontics 56) After cleaning an acute abscess, drainage persists. Next step? Antibiotics Immediate obturation Intracanal medicament Extraction Calcium hydroxide medicament controls exudate. 57 / 63 Category: Endodontics 57) Which dentin component causes pain in exposed DT? Collagen Fluid movement Odontoblastic processes Hydroxyapatite Fluid shifts in dentinal tubules stimulate nerve endings. 58 / 63 Category: Endodontics 58) What causes a tooth to turn yellow after trauma? Pulp obliteration Internal resorption Necrosis External resorption Trauma can lead to pulp obliteration and discoloration. 59 / 63 Category: Endodontics 59) A patient has transient sensitivity to hot/cold. Next step? Cold test Percussion EPT Heat test Percussion helps rule out periapical involvement. 60 / 63 Category: Endodontics 60) A patient has tenderness/mobility after filling fell out post-RCT (no abscess). Treatment? Non-surgical retreatment + perio Periodontal therapy only Extraction Monitoring Retreatment addresses potential missed canals before perio therapy. 61 / 63 Category: Endodontics 61) How can a doctor differentiate between tooth #11 and #21 after avulsion? Mesial slope is shorter Crown length is longer Root curvature is different Distal surface is rounded The distal surface of tooth #21 is typically more rounded. 62 / 63 Category: Endodontics 62) Which tooth most commonly has root fractures? Maxillary 1st premolar Maxillary 2nd premolar Mandibular 2nd molar Mandibular 1st molar Maxillary 1st premolars are prone to root fractures due to anatomy. 63 / 63 Category: Endodontics 63) What is used to track a sinus tract? Saline 20 GP 20 Paper point 15 K-file A gutta-percha (GP) point traces sinus tracts radiographically. Your score is The average score is 61% Facebook Twitter 0% Restart quiz Please rate this exam and leave a comment with any notes or suggestions. 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