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% 1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465 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 / 65 Category: Endodontics 1) What is the recommended irrigation solution for an open apex? H2O2 and NaOCl CHX and NaOCl EDTA and NaOCl H2O2 and CHX EDTA and NaOCl are used for their combined ability to clean and disinfect the canal. 2 / 65 Category: Endodontics 2) How to confirm vertical root fracture? Exploratory surgery CBCT Transillumination Percussion test Exploratory surgery provides definitive diagnosis. 3 / 65 Category: Endodontics 3) A pediatric patient with trauma and pinpoint pulp exposure for 3 days. What is the treatment? RCT Indirect pulp capping Direct pulp capping with MTA Pulpotomy Pulpotomy is preferred for traumatized primary teeth. 4 / 65 Category: Endodontics 4) Which dental material has a caustic effect on tissues? MTA Calcium hydroxide Zinc oxide Formocresol Formocresol is known for its caustic properties. 5 / 65 Category: Endodontics 5) Which material is most toxic? Ledermix Ferric sulfate CAH MTA Ferric sulfate is cytotoxic to tissues. 6 / 65 Category: Endodontics 6) What makes MTA radiopaque? Zinc Bismuth Silica Calcium Bismuth oxide in MTA provides radiopacity. 7 / 65 Category: Endodontics 7) What does EDTA stand for? Ethanoldiamine tetraacetic acid 12% Ethylenediamine tetraacetic acid 17% Ethanoldiamine tetraacetic acid 17% Ethylenediamine tetraacetic acid 12% EDTA is a 17% chelating agent used in canal irrigation. 8 / 65 Category: Endodontics 8) Which type of canal is most difficult to treat in endodontics? Fused roots Long, curved, narrow Short, straight, wide Calcified Long, curved, narrow canals are technically challenging. 9 / 65 Category: Endodontics 9) After cleaning an acute abscess, drainage persists. Next step? Extraction Intracanal medicament Antibiotics Immediate obturation Calcium hydroxide medicament controls exudate. 10 / 65 Category: Endodontics 10) During RCT, uncontrolled bleeding and lost WL indicate? Calcified canal Cracked root Instrument separation Perforation Sudden bleeding and WL loss suggest perforation. 11 / 65 Category: Endodontics 11) A patient has fractures in enamel, dentin, and exposed pulp. What is the treatment? Pulpotomy Extraction Indirect pulp cap Direct pulp cap Direct pulp capping is indicated for exposed vital pulp. 12 / 65 Category: Endodontics 12) A patient presents with severe pain in tooth #46, sensitive to cold but negative to percussion. What is the emergency treatment? Remove caries + filling Direct pulp capping Extraction Pulpotomy Pulpotomy is the emergency treatment for irreversible pulpitis. 13 / 65 Category: Endodontics 13) A patient complains of dark tooth after RCT. What is the most probable cause? Leaking restoration Debris in tubules Blood pigments in tubules Bacterial infection Blood pigments in tubules are common after trauma (if mentioned in the question). 14 / 65 Category: Endodontics 14) What is the cause of a pinkish tooth? Internal resorption External resorption Caries Enamel hypoplasia Internal resorption leads to vascular changes causing pink discoloration. 15 / 65 Category: Endodontics 15) A patient has broken instruments in the apical third but is asymptomatic after 3 months. What is the management? Follow-up Non-surgical retreatment Surgical intervention Extraction Asymptomatic cases with broken instruments can be monitored. 16 / 65 Category: Endodontics 16) What causes discoloration in an endo-treated traumatized tooth? Debris in dentinal tubules Blood components in tubules Bacteria in dentinal tubules Residual pulp tissue Blood pigments from trauma seep into dentinal tubules, causing discoloration. 17 / 65 Category: Endodontics 17) A patient has pain in tooth #46 and an impacted adjacent tooth. What is the treatment? Inform about the impacted tooth Monitor Extract the impacted tooth Treat tooth #46 The pain is likely from #46, which requires treatment. 18 / 65 Category: Endodontics 18) What causes a tooth to turn yellow after trauma? Internal resorption External resorption Necrosis Pulp obliteration Trauma can lead to pulp obliteration and discoloration. 19 / 65 Category: Endodontics 19) What is used to track a sinus tract? Saline 15 K-file 20 Paper point 20 GP A gutta-percha (GP) point traces sinus tracts radiographically. 20 / 65 Category: Endodontics 20) A patient has pain post-RCT with no intervention needed. Treatment? NSAID Muscle relaxant Steroid Antibiotic NSAIDs manage post-operative inflammation. 21 / 65 Category: Endodontics 21) What causes an orange-brown color when mixing solutions? H2O2 and EDTA NaOCl and saline CHX and H2O2 CHX and NaOCl CHX and NaOCl react to form an orange-brown precipitate. 22 / 65 Category: Endodontics 22) An endo-treated tooth (#37) causes pain. Likely cause? Overfilling Periapical cyst Cracked root Missing MB2 Missed MB2 canals are a common cause of persistent pain. 23 / 65 Category: Endodontics 23) What is a disadvantage of gutta-percha? Difficult to remove Shrinks over time Poor sealing ability Lack of rigidity Gutta-percha lacks rigidity, making it challenging in some cases. 24 / 65 Category: Endodontics 24) How far should the spreader penetrate in lateral compaction? 3-4 mm Half the canal length Less than 1-2 mm To the apex Spreader should stay 1-2 mm short to avoid apical pressure. 25 / 65 Category: Endodontics 25) Which of the following is NOT a feature of calcium hydroxide sealer? Soluble Antibacterial Induces hard tissue formation Radiopaque Calcium hydroxide sealers are known to be soluble over time. 26 / 65 Category: Endodontics 26) Which dentin component causes pain in exposed DT? Hydroxyapatite Fluid movement Collagen Odontoblastic processes Fluid shifts in dentinal tubules stimulate nerve endings. 27 / 65 Category: Endodontics 27) When should MTA be placed after a perforation? Immediately After cleaning and shaping After 1 week After symptoms resolve Immediate placement prevents complications. 28 / 65 Category: Endodontics 28) Why might a canal disappear during RCT? Canal splitting Calcification File separation Perforation Canals may split into smaller, undetectable branches. 29 / 65 Category: Endodontics 29) A patient has severe nocturnal pain, no cold response, and a sinus tract. Diagnosis? Chronic abscess Irreversible pulpitis Reversible pulpitis Acute abscess Chronic abscess presents with sinus tract and no acute symptoms. 30 / 65 Category: Endodontics 30) A patient returns with pain 2 days after RCT. No intervention is needed. What is the next step? Replace ibuprofen with acetaminophen Combine ibuprofen with acetaminophen Increase ibuprofen dose Prescribe antibiotics Combination therapy is more effective for pain control. 31 / 65 Category: Endodontics 31) What is the best management for a perforation? Immediate repair with MTA No treatment Delayed repair Extraction MTA provides an immediate seal for perforations. 32 / 65 Category: Endodontics 32) A patient has pain in crowned teeth (#26, 27) with perfect RCT and crown. Next step? Remove crowns Cold test CBCT Percussion test CBCT detects hidden cracks or fractures. 33 / 65 Category: Endodontics 33) What is a potential outcome of pulpotomy with ferric sulfate? Coronal resorption Internal resorption External resorption Apical resorption Ferric sulfate may trigger internal resorption. 34 / 65 Category: Endodontics 34) What is the cross-section shape of a Flex-R file? Triangular Rectangular Round Square Flex-R files have a triangular cross-section for flexibility. 35 / 65 Category: Endodontics 35) A patient has transient sensitivity to hot/cold. Next step? Percussion Cold test Heat test EPT Percussion helps rule out periapical involvement. 36 / 65 Category: Endodontics 36) Which tooth consistently has a single canal? Maxillary central Mandibular premolar Mandibular canine Maxillary canine Maxillary central incisors typically have one canal. 37 / 65 Category: Endodontics 37) Which image shows internal resorption? [Image B] [Image A] [Image C] [Image D] Internal resorption appears as irregular radiolucency within the tooth. 38 / 65 Category: Endodontics 38) A calcified canal is encountered during RCT. What should you do? Refer to an endodontist Continue the procedure Use ultrasonic tips Take a CBCT Calcified canals often require specialized expertise. 39 / 65 Category: Endodontics 39) A tooth has pinpoint exposure with no bleeding. What is the treatment? RCT Extraction Direct pulp capping Indirect pulp capping Direct pulp capping is suitable for non-bleeding exposures. 40 / 65 Category: Endodontics 40) A crowned tooth (#46) has normal probing but percussion pain. What should you do? Take a panorama X-ray Extraction Remove the crown to check for cracks Use a comp X-ray Cracks under crowns are a common cause of pain. 41 / 65 Category: Endodontics 41) 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. 42 / 65 Category: Endodontics 42) What measures pulp oxygen levels? EPT Cold test Laser Doppler Pulp oximeter Pulp oximetry assesses pulp vitality via oxygen saturation. 43 / 65 Category: Endodontics 43) Which root rarely has two canals? Distobuccal root of upper 6 Distal root of lower 6 Mesial root of lower 6 Palatal root of upper 6 The distobuccal root of maxillary molars seldom has two canals. 44 / 65 Category: Endodontics 44) How is internal resorption managed? Monitoring Apexification RCT Extraction RCT stops progressive internal resorption. 45 / 65 Category: Endodontics 45) A patient has sensitivity to cold and a crack on the mesial surface. Pain stops upon stimulus removal. What is the pulp condition? Reversible pulpitis Normal pulp Necrotic pulp Irreversible pulpitis Reversible pulpitis is characterized by transient pain. 46 / 65 Category: Endodontics 46) Which material promotes periapical healing? Corticosteroids Calcium hydroxide Zinc phosphate Eugenol Calcium hydroxide aids in healing due to its biocompatibility. 47 / 65 Category: Endodontics 47) What is the primary use of a nerve broach? Measure canal length Clean and shape canals Remove pulp tissue Place medicaments Nerve broaches extirpate pulp from canals. 48 / 65 Category: Endodontics 48) If the master file doesn’t reach the full working length, what should you do? Use a scaler Force the file into the canal Take a new X-ray Use irrigation with saline Irrigation helps remove debris blocking the canal. 49 / 65 Category: Endodontics 49) In the SLOB technique, where is the lingual canal located? Buccal Lingual Distal Mesial SLOB rule: Same Lingual, Opposite Buccal. 50 / 65 Category: Endodontics 50) What is the medicament for a weeping canal? Calcium hydroxide Ledermix Formocresol Saline Calcium hydroxide dries exudate and disinfects. 51 / 65 Category: Endodontics 51) What is the best diagnostic method for detecting a crack in a tooth? Transillumination Biting test X-ray Percussion test Transillumination highlights cracks effectively. 52 / 65 Category: Endodontics 52) Non-vital intracanal bleaching most commonly causes which type of resorption? Periapical External cervical Intraradicular Internal External cervical resorption is a known complication. 53 / 65 Category: Endodontics 53) What type of sealer is AH26? Calcium hydroxide Resin Glass ionomer Zinc oxide AH26 is a resin-based sealer. 54 / 65 Category: Endodontics 54) What is the primary indication for apexification? Internal resorption Root fracture Open apex in immature teeth Periapical abscess Apexification is used to induce apical closure in immature teeth. 55 / 65 Category: Endodontics 55) What causes “sealer puffiness” in an endo-treated tooth with a lateral lesion? Lateral canal Overfilled canal Vertical root fracture Periapical abscess Sealer puffiness often indicates a lateral canal. 56 / 65 Category: Endodontics 56) Which tooth most commonly has root fractures? Maxillary 1st premolar Mandibular 1st molar Mandibular 2nd molar Maxillary 2nd premolar Maxillary 1st premolars are prone to root fractures due to anatomy. 57 / 65 Category: Endodontics 57) An 8-year-old patient has severe pain in tooth #6. What is the treatment? Pulpotomy RCT Apexogenesis Extraction Apexogenesis preserves pulp vitality in immature teeth. 58 / 65 Category: Endodontics 58) What is the purpose of a lentulo spiral? To enlarge canals To dry canals To remove pulp To place sealer in tubules Lentulo spirals deliver sealer into dentinal tubules. 59 / 65 Category: Endodontics 59) Where is MB2 located relative to MB1? Palatal Mesial Buccal Distal MB2 is typically palatal to MB1 in maxillary molars. 60 / 65 Category: Endodontics 60) Why remove the access filling temporarily? To check hemostasis To avoid overfilling To reassess canal anatomy To reduce cost Temporary removal ensures proper hemostasis before final obturation. 61 / 65 Category: Endodontics 61) What is the best sterilization method for gutta-percha? CHX Glutaraldehyde 5.25% NaOCl Full-concentration NaOCl 5.25% NaOCl effectively sterilizes gutta-percha. 62 / 65 Category: Endodontics 62) How many roots does an upper second molar usually have? 4 2 1 3 Maxillary second molars commonly have three roots. 63 / 65 Category: Endodontics 63) A patient has tenderness/mobility after filling fell out post-RCT (no abscess). Treatment? Extraction Periodontal therapy only Non-surgical retreatment + perio Monitoring Retreatment addresses potential missed canals before perio therapy. 64 / 65 Category: Endodontics 64) Which nerve fiber is responsible for sharp pain? Unmyelinated C fibers A-beta fibers B fibers Myelinated A-delta fibers A-delta fibers transmit sharp, localized pain. 65 / 65 Category: Endodontics 65) How can a doctor differentiate between tooth #11 and #21 after avulsion? Crown length is longer Root curvature is different Mesial slope is shorter Distal surface is rounded The distal surface of tooth #21 is typically more rounded. 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