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?
- 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?
- The cold test.
- What is a key limitation of electric pulp testing?
- It only measures nerve response, not blood supply, so it can give unreliable results after trauma.
- What does a positive percussion test suggest?
- Inflammation of the periodontal ligament or periapical tissues.
- Why is a rubber dam used during root canal therapy?
- 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?
- Sodium hypochlorite.
- What is the main action of sodium hypochlorite when irrigating a canal?
- It dissolves organic tissue and disinfects the canal.
- What is EDTA used for during root canal preparation?
- To remove the smear layer and chelate inorganic dentin debris.
- What is a sodium hypochlorite accident?
- 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?
- Gutta-percha.
- What is the purpose of endodontic sealer?
- To fill microscopic gaps between gutta-percha and canal walls, creating a fluid-tight seal.
- What is the difference between apexogenesis and apexification?
- 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?
- Calcium hydroxide.
- Why is determining working length important before obturation?
- 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?
- An electronic apex locator.