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