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NEET MDS Quiz - Practice Test
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Practice Test

Endodontics - 3 Questions

1
Endodontics

In walking bleach procedure which of the following technique are used 
1. Sodium perborate
2. HCI
3. Carbamide peroxide
4. EDTA

📝 Explanation:

In the walking bleach procedure, sodium perborate is the primary technique used. The walking bleach method involves: 1) Mixing sodium perborate with water or 3% hydrogen peroxide to form a paste, 2) Placing this mixture in the pulp chamber of endodontically treated teeth, 3) Sealing the access cavity with temporary restoration, 4) Patient returns after 3-7 days for evaluation and possible reapplication. Sodium perborate releases oxygen slowly, providing sustained bleaching action. HCl is used in microabrasion, not walking bleach.

2
Endodontics
In periapical surgery, which of the following flap designs limits access to the operative site and often heals with scar formation 
 1. Envelope
 2. Rectangular
 3. Triangular
 4. None of the above

📝 Explanation:

Envelope flaps limit access to the operative site and often heal with scar formation due to inadequate blood supply at the incision line. Triangular and rectangular flaps provide better access and healing.

3
Endodontics
After obturation of a traumatised central incisor, horizontal line of material is noted in the apical third root extending mesially and distally to the periodontal space. The common cause
1) Horizontal root fracture
2) Accessory canal
3) Internal resorption
4) External resorption

📝 Explanation:

A horizontal root fracture creates a pathway that allows the filling material to escape the confines of the canal space and appear as a distinct line on a radiograph.

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