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NEET MDS Endodontics Flashcards
63 question-and-answer cards covering Endodontics as it is examined in NEET MDS. 24 of them are printed below, taken from across the deck — no signup, no paywall on the preview.
24 sample cards from the Endodontics deck
Sampled from the end of the deck, so these are different cards from the ones shown on the syllabus page.
Name the main categories of root canal sealers.
Zinc oxide-eugenol based, calcium hydroxide based, glass ionomer based, resin based (e.g., epoxy resin like AH Plus), silicone based, and bioceramic/calcium silicate based sealers.
What are the advantages of bioceramic (calcium silicate) sealers?
High biocompatibility, dimensional stability, alkaline antibacterial pH, hydrophilicity (sets in moisture), bond/sealing ability, and bioactivity (apatite formation promoting healing).
List the basic sequential steps of conventional root canal treatment.
Diagnosis and anesthesia, isolation (rubber dam), access cavity preparation, working length determination, cleaning and shaping (biomechanical preparation with irrigation), drying, obturation, and coronal restoration.
What is the objective of access cavity preparation?
To achieve straight-line access to all canal orifices, completely remove the pulp chamber roof, and conserve sound tooth structure for an unobstructed instrument path.
Where is the ideal apical termination (working length endpoint) of canal preparation and obturation?
At the apical constriction (the cementodentinal junction), generally about 0.5-1 mm short of the radiographic apex, where the canal is narrowest.
What is the gold-standard obturation technique for adaptation to canal walls?
Warm vertical compaction (Schilder technique) of thermoplasticized gutta-percha, which adapts well to irregularities and lateral canals; lateral cold compaction is a common alternative.
What are the main indications for endodontic retreatment?
Persistent or recurrent periapical disease, inadequate previous obturation, missed canals, coronal leakage/recontamination, or new caries/fracture compromising a previously treated tooth that is restorable.
What materials/obstructions complicate nonsurgical retreatment, and how are they managed?
Gutta-percha (removed with solvents like chloroform plus files/rotary), pastes, separated instruments, posts, and ledges; carrier-based or hard pastes and separated files often require ultrasonics or specialized removal kits."},
What is an apicoectomy and when is it indicated?
Surgical removal of the apical portion of the root (root-end resection) with retrograde filling, indicated when nonsurgical treatment/retreatment is not feasible or has failed, e.g., persistent apical pathology, blocked canals, or large cysts requiring biopsy.
What is the preferred root-end filling (retrofill) material in modern surgical endodontics and why?
MTA (mineral trioxide aggregate) or other calcium silicate cements, due to excellent sealing, biocompatibility, hydrophilic setting, and promotion of periapical healing/hard tissue formation.
Differentiate hemisection from root amputation (radisectomy).
Hemisection: a multirooted (usually mandibular molar) tooth is split and one half (root plus its crown portion) is removed. Root amputation: only a root is removed while the entire crown is retained, typically on maxillary molars.
How is a sodium hypochlorite accident managed intraoperatively?
NaOCl extruded beyond the apex causes sudden severe pain, swelling, bleeding, and possible bruising; manage with copious saline irrigation, analgesics, cold then warm compresses, antibiotics if indicated, and reassurance with follow-up.
What is a separated (fractured) instrument and what factors influence the prognosis?
A file fragment retained in the canal; prognosis depends on the stage of cleaning when it broke, the canal already prepared apically, the position relative to curvature, and whether infection control was achieved before separation.
What is canal transportation and how is it avoided?
Deviation of the prepared canal away from its original axis (e.g., zipping at curves, strip perforation), caused by stiff instruments; avoided by using flexible NiTi files, pre-curving, maintaining patency, and crown-down sequencing.
What is a common postoperative complication after obturation and how is it managed?
Post-obturation flare-up (interappointment or post-treatment pain/swelling from periapical inflammation or extrusion); managed with occlusal reduction, analgesics/NSAIDs, drainage if needed, and antibiotics only with systemic involvement.
What is the material of choice for pulpotomy in primary teeth and a traditional alternative?
MTA (and increasingly Biodentine) is the preferred medicament; formocresol was the long-standing traditional agent, now declining due to toxicity/carcinogenicity concerns. Ferric sulfate is another alternative.
Why is obturation of primary teeth done with resorbable materials?
Because primary roots physiologically resorb before exfoliation, fillers such as zinc oxide-eugenol, calcium hydroxide/iodoform pastes (e.g., Vitapex), or Metapex are used so they resorb with the root and do not deflect the succedaneous tooth.
What is apexogenesis and when is it indicated?
A vital pulp therapy in an immature permanent tooth that preserves the vital radicular pulp (e.g., via pulpotomy) to allow continued normal root development and physiologic apical closure.
What is apexification and the materials used?
Inducing a calcific apical barrier in a non-vital immature permanent tooth: traditionally multi-visit calcium hydroxide, now commonly a single-visit MTA (or Biodentine) apical plug to allow obturation of the open apex.
What is regenerative endodontics (revascularization)?
A biologically based procedure to replace damaged pulp-dentin tissue, including the root structures, in immature necrotic teeth, aiming to restore vitality and continued root development rather than placing an artificial barrier.
What is the triad of tissue engineering applied in regenerative endodontics?
Stem cells (e.g., from the apical papilla, induced via periapical bleeding), scaffolds (blood clot, PRP/PRF), and signaling molecules/growth factors, supported by disinfection and a coronal seal.
Why is a triple antibiotic paste (or calcium hydroxide) used in regenerative protocols, and what is a caution?
It disinfects the canal without aggressive instrumentation that would weaken thin immature walls. Caution: minocycline in triple antibiotic paste causes tooth discoloration, so it may be omitted or substituted (double antibiotic paste).
How do operating microscopes and ultrasonics improve endodontic outcomes?
Magnification and coaxial illumination allow location of calcified/extra canals (e.g., MB2), detection of fractures and perforations, and conservative refined preparation; ultrasonics aid access refinement, irrigant activation, and removal of obstructions.
What is laser-activated (or sonic/ultrasonic) irrigation and its benefit?
Energizing the irrigant to create acoustic streaming/cavitation that enhances penetration into isthmuses, lateral canals, and dentinal tubules, improving smear layer and biofilm removal beyond passive irrigation.
What this deck covers
The Endodontics deck follows the NEET MDS Endodontics syllabus — 9 chapters and 21 topics — so questions land on material that is genuinely examinable rather than trivia around it. That works out to roughly 7.0 cards per chapter.
Answers are written to be recallable, not just readable — averaging about 213 characters, which is long enough to carry the reasoning and short enough to say out loud.
A deck like this earns its keep on the second and third pass. Read the syllabus first so you know the shape of the subject, then use the cards to find the specific facts that have not stuck.
Endodontics flashcards FAQ
How many Endodontics flashcards are in this NEET MDS deck?
63 cards. This page previews 24 of them, sampled evenly across the deck so you can judge the difficulty before installing anything.
Are these NEET MDS flashcards free?
Yes. The preview here is free to read with no signup, and the full 63-card deck is free inside the Examius app.
What do the Endodontics cards cover?
They follow the NEET MDS Endodontics syllabus — 9 chapters and 21 topics — so the questions track what is actually examinable.
How should I use these flashcards?
Read the syllabus first so you know the shape of the subject, then drill the deck. Examius schedules each card with spaced repetition, so cards you keep missing come back sooner and ones you know drift further apart.