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NEET MDS Quiz - Practice Test
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Practice Test

endodontics - 3 Questions

1
Endodontics
In class III Ellis fracture 
 1. Only enamel is involved
 2. Enamel and dentin are involved
 3. Enamel,dentin and pulp are involved
 4. Non-vital pulp

πŸ“ Explanation:

Class III: Enamel-Dentin-Pulp Fracture

  • Description: Involves enamel, dentin, and exposes the pulp.
  • Endodontic Consideration: This type of fracture typically requires endodontic treatment (root canal therapy) to manage the exposed pulp and prevent infection. The prognosis depends on the extent of the fracture and the vitality of the pulp.

2
Endodontics
Vertical condensation of gutta-percha 
 1. Used for both lateral and vertical canals
 2. Mainly used with step back
 3. Retrieval is more difficult & associated with root fractures
 4. All of the above

πŸ“ Explanation:

Vertical condensation of gutta-percha is more difficult to retrieve and is associated with root fractures. This is because: 1) The thermoplasticized gutta-percha bonds more intimately with canal walls, 2) Heat application during condensation makes removal challenging, 3) Excessive force during condensation can cause vertical root fractures, 4) Dense packing requires aggressive instrumentation for removal, 5) The technique requires greater operator skill and carries higher risk of complications. While it can provide excellent seal, the difficulty of retreatment and risk of root fracture are significant disadvantages.

3
Endodontics
A 12-year-old child comes to your office with a history of long-term use of tetracycline. The anterior teeth are a mild yellowith brown. What method would you use to remove the stain? 
 1. Hydrochloric acid pumice microabrasions
 2. At home bleaching method
 3. Superoxol with or without heat
 4. Composite resin veneers

πŸ“ Explanation:

For mild tetracycline staining in a 12-year-old child, at-home bleaching is the most conservative and effective first-line treatment. It uses lower concentrations (10-15% carbamide peroxide) which are safer for young patients, provides gradual treatment that reduces sensitivity. Hydrochloric acid microabrasion is too aggressive for mild stains, Superoxol (30% H2O2) is too strong for vital teeth in children, and composite veneers are too invasive for mild discoloration.

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