Root canal therapy concepts and restorative material selection tested on the INBDE.
40 cards · basic cards · AI-written, checked twice. Edit anything.
- How does the pain of reversible pulpitis differ from irreversible pulpitis?
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Reversible pulpitis pain is brief and stops once the stimulus is removed; irreversible pulpitis pain lingers after the stimulus is gone.- What diagnostic test uses a thermal stimulus such as refrigerant spray to assess pulp vitality?
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The cold test.- What is a key limitation of electric pulp testing?
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It only measures nerve response, not blood supply, so it can give unreliable results after trauma.- What does a positive percussion test suggest?
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Inflammation of the periodontal ligament or periapical tissues.- Why is a rubber dam used during root canal therapy?
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To isolate the tooth, prevent contamination, and protect the airway from instruments or irrigants.- What is the most commonly used irrigant in root canal therapy?
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Sodium hypochlorite.- What is the main action of sodium hypochlorite when irrigating a canal?
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It dissolves organic tissue and disinfects the canal.- What is EDTA used for during root canal preparation?
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To remove the smear layer and chelate inorganic dentin debris.- What is a sodium hypochlorite accident?
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Extrusion of irrigant beyond the apex causing sudden pain, swelling, and tissue damage.- What material is most commonly used to fill the root canal space after cleaning and shaping?
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Gutta-percha.- What is the purpose of endodontic sealer?
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To fill microscopic gaps between gutta-percha and canal walls, creating a fluid-tight seal.- What is the difference between apexogenesis and apexification?
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Apexogenesis preserves vital pulp to allow continued root development; apexification induces a hard tissue barrier in a nonvital tooth with an open apex.- Which medicament is classically used to induce apexification?
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Calcium hydroxide.- Why is determining working length important before obturation?
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It ensures instrumentation and filling stop at the correct distance from the apex, avoiding overextension or underfilling.- What device helps clinically determine root canal working length?
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An electronic apex locator.
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